==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:336 [inline]
BUG: KASAN: slab-use-after-free in move_to_new_folio+0x132/0x760 mm/migrate.c:983
Read of size 8 at addr ffff88807ba82e08 by task syz.6.1628/10265
CPU: 0 UID: 0 PID: 10265 Comm: syz.6.1628 Not tainted 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
mapping_inaccessible include/linux/pagemap.h:336 [inline]
move_to_new_folio+0x132/0x760 mm/migrate.c:983
migrate_folio_move mm/migrate.c:1301 [inline]
migrate_folios_move mm/migrate.c:1653 [inline]
migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1900
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1930
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2039
compact_zone+0x2023/0x4760 mm/compaction.c:2683
compact_node+0x1a4/0x2d0 mm/compaction.c:2952
compact_nodes mm/compaction.c:2974 [inline]
sysctl_compaction_handler mm/compaction.c:3025 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:3012
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa18118e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1820ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa1813b5fa0 RCX: 00007fa18118e9a9
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007fa181210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa1813b5fa0 R15: 00007ffe38333a88
Allocated by task 8795:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4745
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
rcu_do_batch kernel/rcu/tree.c:2576 [inline]
rcu_core+0x79c/0x14e0 kernel/rcu/tree.c:2832
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3094
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2183
__queue_work+0x97e/0x10f0 kernel/workqueue.c:2341
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561
queue_delayed_work include/linux/workqueue.h:677 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88807ba82a40
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 968 bytes inside of
freed 1224-byte region [ffff88807ba82a40, ffff88807ba82f08)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807ba824f8 pfn:0x7ba80
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
raw: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
head: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001eea001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8485, tgid 8484 (syz.2.1006), ts 256914562029, free_ts 253660529634
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab mm/slub.c:2619 [inline]
new_slab+0x23b/0x330 mm/slub.c:2673
___slab_alloc+0xd9c/0x1940 mm/slub.c:3859
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 8421 tgid 8421 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__folio_put+0x329/0x450 mm/swap.c:112
vhost_vq_free_iovecs drivers/vhost/vhost.c:454 [inline]
vhost_dev_free_iovecs drivers/vhost/vhost.c:491 [inline]
vhost_dev_cleanup+0x7bf/0x1030 drivers/vhost/vhost.c:1040
vhost_vsock_dev_release+0x2d6/0x400 drivers/vhost/vsock.c:754
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88807ba82d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807ba82e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ba82e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82f00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
BUG: KASAN: slab-use-after-free in arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:336 [inline]
BUG: KASAN: slab-use-after-free in move_to_new_folio+0x6d0/0x760 mm/migrate.c:983
Read of size 8 at addr ffff88807ba82e08 by task syz.6.1628/10265
CPU: 1 UID: 0 PID: 10265 Comm: syz.6.1628 Tainted: G B 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
mapping_inaccessible include/linux/pagemap.h:336 [inline]
move_to_new_folio+0x6d0/0x760 mm/migrate.c:983
migrate_folio_move mm/migrate.c:1301 [inline]
migrate_folios_move mm/migrate.c:1653 [inline]
migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1900
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1930
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2039
compact_zone+0x2023/0x4760 mm/compaction.c:2683
compact_node+0x1a4/0x2d0 mm/compaction.c:2952
compact_nodes mm/compaction.c:2974 [inline]
sysctl_compaction_handler mm/compaction.c:3025 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:3012
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa18118e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1820ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa1813b5fa0 RCX: 00007fa18118e9a9
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007fa181210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa1813b5fa0 R15: 00007ffe38333a88
Allocated by task 8795:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4745
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
rcu_do_batch kernel/rcu/tree.c:2576 [inline]
rcu_core+0x79c/0x14e0 kernel/rcu/tree.c:2832
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3094
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2183
__queue_work+0x97e/0x10f0 kernel/workqueue.c:2341
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561
queue_delayed_work include/linux/workqueue.h:677 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88807ba82a40
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 968 bytes inside of
freed 1224-byte region [ffff88807ba82a40, ffff88807ba82f08)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807ba824f8 pfn:0x7ba80
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
raw: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
head: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001eea001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8485, tgid 8484 (syz.2.1006), ts 256914562029, free_ts 253660529634
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab mm/slub.c:2619 [inline]
new_slab+0x23b/0x330 mm/slub.c:2673
___slab_alloc+0xd9c/0x1940 mm/slub.c:3859
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 8421 tgid 8421 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__folio_put+0x329/0x450 mm/swap.c:112
vhost_vq_free_iovecs drivers/vhost/vhost.c:454 [inline]
vhost_dev_free_iovecs drivers/vhost/vhost.c:491 [inline]
vhost_dev_cleanup+0x7bf/0x1030 drivers/vhost/vhost.c:1040
vhost_vsock_dev_release+0x2d6/0x400 drivers/vhost/vsock.c:754
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88807ba82d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807ba82e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ba82e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82f00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in move_to_new_folio+0x5e9/0x760 mm/migrate.c:985
Read of size 8 at addr ffff88807ba82e00 by task syz.6.1628/10265
CPU: 1 UID: 0 PID: 10265 Comm: syz.6.1628 Tainted: G B 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
move_to_new_folio+0x5e9/0x760 mm/migrate.c:985
migrate_folio_move mm/migrate.c:1301 [inline]
migrate_folios_move mm/migrate.c:1653 [inline]
migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1900
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1930
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2039
compact_zone+0x2023/0x4760 mm/compaction.c:2683
compact_node+0x1a4/0x2d0 mm/compaction.c:2952
compact_nodes mm/compaction.c:2974 [inline]
sysctl_compaction_handler mm/compaction.c:3025 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:3012
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa18118e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1820ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa1813b5fa0 RCX: 00007fa18118e9a9
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007fa181210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa1813b5fa0 R15: 00007ffe38333a88
Allocated by task 8795:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4745
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
rcu_do_batch kernel/rcu/tree.c:2576 [inline]
rcu_core+0x79c/0x14e0 kernel/rcu/tree.c:2832
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3094
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2183
__queue_work+0x97e/0x10f0 kernel/workqueue.c:2341
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561
queue_delayed_work include/linux/workqueue.h:677 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88807ba82a40
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 960 bytes inside of
freed 1224-byte region [ffff88807ba82a40, ffff88807ba82f08)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807ba824f8 pfn:0x7ba80
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
raw: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
head: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001eea001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8485, tgid 8484 (syz.2.1006), ts 256914562029, free_ts 253660529634
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab mm/slub.c:2619 [inline]
new_slab+0x23b/0x330 mm/slub.c:2673
___slab_alloc+0xd9c/0x1940 mm/slub.c:3859
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 8421 tgid 8421 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__folio_put+0x329/0x450 mm/swap.c:112
vhost_vq_free_iovecs drivers/vhost/vhost.c:454 [inline]
vhost_dev_free_iovecs drivers/vhost/vhost.c:491 [inline]
vhost_dev_cleanup+0x7bf/0x1030 drivers/vhost/vhost.c:1040
vhost_vsock_dev_release+0x2d6/0x400 drivers/vhost/vsock.c:754
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88807ba82d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807ba82e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ba82e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82f00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x26f/0x2b0 kernel/locking/spinlock_debug.c:115
Read of size 4 at addr ffff88807ba82e1c by task syz.6.1628/10265
CPU: 0 UID: 0 PID: 10265 Comm: syz.6.1628 Tainted: G B 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
do_raw_spin_lock+0x26f/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:351 [inline]
__buffer_migrate_folio+0x40b/0x6d0 mm/migrate.c:842
move_to_new_folio+0x1e7/0x760 mm/migrate.c:993
migrate_folio_move mm/migrate.c:1301 [inline]
migrate_folios_move mm/migrate.c:1653 [inline]
migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1900
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1930
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2039
compact_zone+0x2023/0x4760 mm/compaction.c:2683
compact_node+0x1a4/0x2d0 mm/compaction.c:2952
compact_nodes mm/compaction.c:2974 [inline]
sysctl_compaction_handler mm/compaction.c:3025 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:3012
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa18118e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1820ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa1813b5fa0 RCX: 00007fa18118e9a9
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007fa181210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa1813b5fa0 R15: 00007ffe38333a88
Allocated by task 8795:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4745
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
rcu_do_batch kernel/rcu/tree.c:2576 [inline]
rcu_core+0x79c/0x14e0 kernel/rcu/tree.c:2832
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3094
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2183
__queue_work+0x97e/0x10f0 kernel/workqueue.c:2341
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561
queue_delayed_work include/linux/workqueue.h:677 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88807ba82a40
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 988 bytes inside of
freed 1224-byte region [ffff88807ba82a40, ffff88807ba82f08)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807ba824f8 pfn:0x7ba80
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
raw: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
head: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001eea001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8485, tgid 8484 (syz.2.1006), ts 256914562029, free_ts 253660529634
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab mm/slub.c:2619 [inline]
new_slab+0x23b/0x330 mm/slub.c:2673
___slab_alloc+0xd9c/0x1940 mm/slub.c:3859
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 8421 tgid 8421 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__folio_put+0x329/0x450 mm/swap.c:112
vhost_vq_free_iovecs drivers/vhost/vhost.c:454 [inline]
vhost_dev_free_iovecs drivers/vhost/vhost.c:491 [inline]
vhost_dev_cleanup+0x7bf/0x1030 drivers/vhost/vhost.c:1040
vhost_vsock_dev_release+0x2d6/0x400 drivers/vhost/vsock.c:754
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88807ba82d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807ba82e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ba82e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82f00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:87 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x27f/0x2b0 kernel/locking/spinlock_debug.c:115
Read of size 8 at addr ffff88807ba82e28 by task syz.6.1628/10265
CPU: 0 UID: 0 PID: 10265 Comm: syz.6.1628 Tainted: G B 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
debug_spin_lock_before kernel/locking/spinlock_debug.c:87 [inline]
do_raw_spin_lock+0x27f/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:351 [inline]
__buffer_migrate_folio+0x40b/0x6d0 mm/migrate.c:842
move_to_new_folio+0x1e7/0x760 mm/migrate.c:993
migrate_folio_move mm/migrate.c:1301 [inline]
migrate_folios_move mm/migrate.c:1653 [inline]
migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1900
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1930
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2039
compact_zone+0x2023/0x4760 mm/compaction.c:2683
compact_node+0x1a4/0x2d0 mm/compaction.c:2952
compact_nodes mm/compaction.c:2974 [inline]
sysctl_compaction_handler mm/compaction.c:3025 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:3012
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa18118e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1820ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa1813b5fa0 RCX: 00007fa18118e9a9
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007fa181210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa1813b5fa0 R15: 00007ffe38333a88
Allocated by task 8795:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4745
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
rcu_do_batch kernel/rcu/tree.c:2576 [inline]
rcu_core+0x79c/0x14e0 kernel/rcu/tree.c:2832
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3094
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2183
__queue_work+0x97e/0x10f0 kernel/workqueue.c:2341
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561
queue_delayed_work include/linux/workqueue.h:677 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88807ba82a40
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 1000 bytes inside of
freed 1224-byte region [ffff88807ba82a40, ffff88807ba82f08)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807ba824f8 pfn:0x7ba80
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
raw: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
head: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001eea001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8485, tgid 8484 (syz.2.1006), ts 256914562029, free_ts 253660529634
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab mm/slub.c:2619 [inline]
new_slab+0x23b/0x330 mm/slub.c:2673
___slab_alloc+0xd9c/0x1940 mm/slub.c:3859
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 8421 tgid 8421 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__folio_put+0x329/0x450 mm/swap.c:112
vhost_vq_free_iovecs drivers/vhost/vhost.c:454 [inline]
vhost_dev_free_iovecs drivers/vhost/vhost.c:491 [inline]
vhost_dev_cleanup+0x7bf/0x1030 drivers/vhost/vhost.c:1040
vhost_vsock_dev_release+0x2d6/0x400 drivers/vhost/vsock.c:754
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88807ba82d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807ba82e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ba82e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82f00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:88 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x265/0x2b0 kernel/locking/spinlock_debug.c:115
Read of size 4 at addr ffff88807ba82e20 by task syz.6.1628/10265
CPU: 0 UID: 0 PID: 10265 Comm: syz.6.1628 Tainted: G B 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
debug_spin_lock_before kernel/locking/spinlock_debug.c:88 [inline]
do_raw_spin_lock+0x265/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:351 [inline]
__buffer_migrate_folio+0x40b/0x6d0 mm/migrate.c:842
move_to_new_folio+0x1e7/0x760 mm/migrate.c:993
migrate_folio_move mm/migrate.c:1301 [inline]
migrate_folios_move mm/migrate.c:1653 [inline]
migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1900
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1930
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2039
compact_zone+0x2023/0x4760 mm/compaction.c:2683
compact_node+0x1a4/0x2d0 mm/compaction.c:2952
compact_nodes mm/compaction.c:2974 [inline]
sysctl_compaction_handler mm/compaction.c:3025 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:3012
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa18118e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1820ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa1813b5fa0 RCX: 00007fa18118e9a9
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007fa181210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa1813b5fa0 R15: 00007ffe38333a88
Allocated by task 8795:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4745
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
rcu_do_batch kernel/rcu/tree.c:2576 [inline]
rcu_core+0x79c/0x14e0 kernel/rcu/tree.c:2832
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3094
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2183
__queue_work+0x97e/0x10f0 kernel/workqueue.c:2341
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561
queue_delayed_work include/linux/workqueue.h:677 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88807ba82a40
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 992 bytes inside of
freed 1224-byte region [ffff88807ba82a40, ffff88807ba82f08)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807ba824f8 pfn:0x7ba80
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
raw: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
head: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001eea001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8485, tgid 8484 (syz.2.1006), ts 256914562029, free_ts 253660529634
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab mm/slub.c:2619 [inline]
new_slab+0x23b/0x330 mm/slub.c:2673
___slab_alloc+0xd9c/0x1940 mm/slub.c:3859
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 8421 tgid 8421 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__folio_put+0x329/0x450 mm/swap.c:112
vhost_vq_free_iovecs drivers/vhost/vhost.c:454 [inline]
vhost_dev_free_iovecs drivers/vhost/vhost.c:491 [inline]
vhost_dev_cleanup+0x7bf/0x1030 drivers/vhost/vhost.c:1040
vhost_vsock_dev_release+0x2d6/0x400 drivers/vhost/vsock.c:754
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88807ba82d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807ba82e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ba82e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82f00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
BUG: KASAN: slab-use-after-free in queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x11d/0x2b0 kernel/locking/spinlock_debug.c:116
Write of size 4 at addr ffff88807ba82e18 by task syz.6.1628/10265
CPU: 0 UID: 0 PID: 10265 Comm: syz.6.1628 Tainted: G B 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
do_raw_spin_lock+0x11d/0x2b0 kernel/locking/spinlock_debug.c:116
spin_lock include/linux/spinlock.h:351 [inline]
__buffer_migrate_folio+0x40b/0x6d0 mm/migrate.c:842
move_to_new_folio+0x1e7/0x760 mm/migrate.c:993
migrate_folio_move mm/migrate.c:1301 [inline]
migrate_folios_move mm/migrate.c:1653 [inline]
migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1900
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1930
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2039
compact_zone+0x2023/0x4760 mm/compaction.c:2683
compact_node+0x1a4/0x2d0 mm/compaction.c:2952
compact_nodes mm/compaction.c:2974 [inline]
sysctl_compaction_handler mm/compaction.c:3025 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:3012
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa18118e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1820ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa1813b5fa0 RCX: 00007fa18118e9a9
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007fa181210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa1813b5fa0 R15: 00007ffe38333a88
Allocated by task 8795:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4745
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
rcu_do_batch kernel/rcu/tree.c:2576 [inline]
rcu_core+0x79c/0x14e0 kernel/rcu/tree.c:2832
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3094
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2183
__queue_work+0x97e/0x10f0 kernel/workqueue.c:2341
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561
queue_delayed_work include/linux/workqueue.h:677 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88807ba82a40
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 984 bytes inside of
freed 1224-byte region [ffff88807ba82a40, ffff88807ba82f08)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807ba824f8 pfn:0x7ba80
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
raw: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888020f38140 dead000000000122 0000000000000000
head: ffff88807ba824f8 00000000800c0002 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001eea001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8485, tgid 8484 (syz.2.1006), ts 256914562029, free_ts 253660529634
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab mm/slub.c:2619 [inline]
new_slab+0x23b/0x330 mm/slub.c:2673
___slab_alloc+0xd9c/0x1940 mm/slub.c:3859
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4204
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 8421 tgid 8421 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__folio_put+0x329/0x450 mm/swap.c:112
vhost_vq_free_iovecs drivers/vhost/vhost.c:454 [inline]
vhost_dev_free_iovecs drivers/vhost/vhost.c:491 [inline]
vhost_dev_cleanup+0x7bf/0x1030 drivers/vhost/vhost.c:1040
vhost_vsock_dev_release+0x2d6/0x400 drivers/vhost/vsock.c:754
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88807ba82d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807ba82e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ba82e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba82f00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================