==================================================================
BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:373 [inline]
BUG: KASAN: slab-use-after-free in gfs2_discard fs/gfs2/aops.c:593 [inline]
BUG: KASAN: slab-use-after-free in gfs2_invalidate_folio+0x72d/0x840 fs/gfs2/aops.c:631
Read of size 8 at addr ffff888058792168 by task syz-executor/26409
CPU: 1 UID: 0 PID: 26409 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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
list_empty include/linux/list.h:373 [inline]
gfs2_discard fs/gfs2/aops.c:593 [inline]
gfs2_invalidate_folio+0x72d/0x840 fs/gfs2/aops.c:631
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2f6/0x490 mm/truncate.c:160
truncate_inode_pages_range+0x24e/0xe50 mm/truncate.c:379
gfs2_evict_inode+0x71c/0x1a30 fs/gfs2/super.c:1439
evict+0x3e6/0x920 fs/inode.c:810
iput_final fs/inode.c:1914 [inline]
iput.part.0+0x6a9/0xb00 fs/inode.c:1966
iput+0x35/0x40 fs/inode.c:1929
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1763 [inline]
gfs2_kill_sb+0x2da/0x420 fs/gfs2/ops_fstype.c:1789
deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
deactivate_super fs/super.c:507 [inline]
deactivate_super+0xde/0x100 fs/super.c:503
cleanup_mnt+0x225/0x450 fs/namespace.c:1318
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111
x64_sys_call+0x14fa/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c458eec9
Code: Unable to access opcode bytes at 0x7f82c458ee9f.
RSP: 002b:00007ffe1d8dd568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f82c4611da2 RCX: 00007f82c458eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007ffe1d8db307 R09: 00007ffe1d8de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d8de7c0
R13: 00007f82c4611d7d R14: 00000000002d591c R15: 00007ffe1d8de800
Allocated by task 26907:
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:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_data+0x4b2/0x7f0 fs/gfs2/trans.c:209
gfs2_trans_add_databufs+0x12e/0x1b0 fs/gfs2/trans.c:246
gfs2_iomap_put_folio+0x3d8/0x490 fs/gfs2/bmap.c:995
__iomap_put_folio.isra.0+0x64/0x140 fs/iomap/buffered-io.c:776
iomap_write_iter fs/iomap/buffered-io.c:1020 [inline]
iomap_file_buffered_write+0x633/0xac0 fs/iomap/buffered-io.c:1071
gfs2_file_buffered_write+0x405/0xad0 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x9d8/0x11a0 fs/gfs2/file.c:1166
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 26907:
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:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4797
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_jdata_writepages+0x12a/0x170 fs/gfs2/aops.c:374
do_writepages+0x27a/0x600 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:419
gfs2_fsync+0x1ef/0x380 fs/gfs2/file.c:752
vfs_fsync_range+0x139/0x220 fs/sync.c:187
generic_write_sync include/linux/fs.h:3036 [inline]
gfs2_file_write_iter+0xc18/0x11a0 fs/gfs2/file.c:1168
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888058792150
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff888058792150, ffff8880587921a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58792
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405ee640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13594, tgid 13593 (syz.1.1945), ts 902654675755, free_ts 902633969557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab mm/slub.c:2660 [inline]
new_slab+0x247/0x330 mm/slub.c:2714
___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
update_statfs+0x10b/0x4a0 fs/gfs2/super.c:251
gfs2_statfs_sync+0x450/0x560 fs/gfs2/super.c:296
gfs2_make_fs_ro+0x1c7/0x370 fs/gfs2/super.c:548
gfs2_reconfigure+0x8b9/0xf10 fs/gfs2/ops_fstype.c:1597
reconfigure_super+0x450/0xb60 fs/super.c:1077
do_remount fs/namespace.c:3264 [inline]
path_mount+0x1808/0x2060 fs/namespace.c:4057
do_mount fs/namespace.c:4078 [inline]
__do_sys_mount fs/namespace.c:4278 [inline]
__se_sys_mount fs/namespace.c:4255 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4255
page last free pid 6072 tgid 6072 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888058792000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
ffff888058792080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888058792100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
^
ffff888058792180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
ffff888058792200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x1ba/0x200 lib/list_debug.c:49
Read of size 8 at addr ffff888058792170 by task syz-executor/26409
CPU: 1 UID: 0 PID: 26409 Comm: syz-executor Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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
__list_del_entry_valid_or_report+0x1ba/0x200 lib/list_debug.c:49
__list_del_entry_valid include/linux/list.h:124 [inline]
__list_del_entry include/linux/list.h:215 [inline]
list_del_init include/linux/list.h:287 [inline]
gfs2_remove_from_journal+0x2ae/0x8d0 fs/gfs2/meta_io.c:355
gfs2_discard fs/gfs2/aops.c:597 [inline]
gfs2_invalidate_folio+0x333/0x840 fs/gfs2/aops.c:631
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2f6/0x490 mm/truncate.c:160
truncate_inode_pages_range+0x24e/0xe50 mm/truncate.c:379
gfs2_evict_inode+0x71c/0x1a30 fs/gfs2/super.c:1439
evict+0x3e6/0x920 fs/inode.c:810
iput_final fs/inode.c:1914 [inline]
iput.part.0+0x6a9/0xb00 fs/inode.c:1966
iput+0x35/0x40 fs/inode.c:1929
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1763 [inline]
gfs2_kill_sb+0x2da/0x420 fs/gfs2/ops_fstype.c:1789
deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
deactivate_super fs/super.c:507 [inline]
deactivate_super+0xde/0x100 fs/super.c:503
cleanup_mnt+0x225/0x450 fs/namespace.c:1318
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111
x64_sys_call+0x14fa/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c458eec9
Code: Unable to access opcode bytes at 0x7f82c458ee9f.
RSP: 002b:00007ffe1d8dd568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f82c4611da2 RCX: 00007f82c458eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007ffe1d8db307 R09: 00007ffe1d8de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d8de7c0
R13: 00007f82c4611d7d R14: 00000000002d591c R15: 00007ffe1d8de800
Allocated by task 26907:
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:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_data+0x4b2/0x7f0 fs/gfs2/trans.c:209
gfs2_trans_add_databufs+0x12e/0x1b0 fs/gfs2/trans.c:246
gfs2_iomap_put_folio+0x3d8/0x490 fs/gfs2/bmap.c:995
__iomap_put_folio.isra.0+0x64/0x140 fs/iomap/buffered-io.c:776
iomap_write_iter fs/iomap/buffered-io.c:1020 [inline]
iomap_file_buffered_write+0x633/0xac0 fs/iomap/buffered-io.c:1071
gfs2_file_buffered_write+0x405/0xad0 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x9d8/0x11a0 fs/gfs2/file.c:1166
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 26907:
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:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4797
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_jdata_writepages+0x12a/0x170 fs/gfs2/aops.c:374
do_writepages+0x27a/0x600 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:419
gfs2_fsync+0x1ef/0x380 fs/gfs2/file.c:752
vfs_fsync_range+0x139/0x220 fs/sync.c:187
generic_write_sync include/linux/fs.h:3036 [inline]
gfs2_file_write_iter+0xc18/0x11a0 fs/gfs2/file.c:1168
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888058792150
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 32 bytes inside of
freed 80-byte region [ffff888058792150, ffff8880587921a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58792
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405ee640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13594, tgid 13593 (syz.1.1945), ts 902654675755, free_ts 902633969557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab mm/slub.c:2660 [inline]
new_slab+0x247/0x330 mm/slub.c:2714
___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
update_statfs+0x10b/0x4a0 fs/gfs2/super.c:251
gfs2_statfs_sync+0x450/0x560 fs/gfs2/super.c:296
gfs2_make_fs_ro+0x1c7/0x370 fs/gfs2/super.c:548
gfs2_reconfigure+0x8b9/0xf10 fs/gfs2/ops_fstype.c:1597
reconfigure_super+0x450/0xb60 fs/super.c:1077
do_remount fs/namespace.c:3264 [inline]
path_mount+0x1808/0x2060 fs/namespace.c:4057
do_mount fs/namespace.c:4078 [inline]
__do_sys_mount fs/namespace.c:4278 [inline]
__se_sys_mount fs/namespace.c:4255 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4255
page last free pid 6072 tgid 6072 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888058792000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
ffff888058792080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888058792100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
^
ffff888058792180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
ffff888058792200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x1c7/0x200 lib/list_debug.c:50
Read of size 8 at addr ffff888058792168 by task syz-executor/26409
CPU: 1 UID: 0 PID: 26409 Comm: syz-executor Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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
__list_del_entry_valid_or_report+0x1c7/0x200 lib/list_debug.c:50
__list_del_entry_valid include/linux/list.h:124 [inline]
__list_del_entry include/linux/list.h:215 [inline]
list_del_init include/linux/list.h:287 [inline]
gfs2_remove_from_journal+0x2ae/0x8d0 fs/gfs2/meta_io.c:355
gfs2_discard fs/gfs2/aops.c:597 [inline]
gfs2_invalidate_folio+0x333/0x840 fs/gfs2/aops.c:631
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2f6/0x490 mm/truncate.c:160
truncate_inode_pages_range+0x24e/0xe50 mm/truncate.c:379
gfs2_evict_inode+0x71c/0x1a30 fs/gfs2/super.c:1439
evict+0x3e6/0x920 fs/inode.c:810
iput_final fs/inode.c:1914 [inline]
iput.part.0+0x6a9/0xb00 fs/inode.c:1966
iput+0x35/0x40 fs/inode.c:1929
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1763 [inline]
gfs2_kill_sb+0x2da/0x420 fs/gfs2/ops_fstype.c:1789
deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
deactivate_super fs/super.c:507 [inline]
deactivate_super+0xde/0x100 fs/super.c:503
cleanup_mnt+0x225/0x450 fs/namespace.c:1318
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111
x64_sys_call+0x14fa/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c458eec9
Code: Unable to access opcode bytes at 0x7f82c458ee9f.
RSP: 002b:00007ffe1d8dd568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f82c4611da2 RCX: 00007f82c458eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007ffe1d8db307 R09: 00007ffe1d8de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d8de7c0
R13: 00007f82c4611d7d R14: 00000000002d591c R15: 00007ffe1d8de800
Allocated by task 26907:
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:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_data+0x4b2/0x7f0 fs/gfs2/trans.c:209
gfs2_trans_add_databufs+0x12e/0x1b0 fs/gfs2/trans.c:246
gfs2_iomap_put_folio+0x3d8/0x490 fs/gfs2/bmap.c:995
__iomap_put_folio.isra.0+0x64/0x140 fs/iomap/buffered-io.c:776
iomap_write_iter fs/iomap/buffered-io.c:1020 [inline]
iomap_file_buffered_write+0x633/0xac0 fs/iomap/buffered-io.c:1071
gfs2_file_buffered_write+0x405/0xad0 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x9d8/0x11a0 fs/gfs2/file.c:1166
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 26907:
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:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4797
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_jdata_writepages+0x12a/0x170 fs/gfs2/aops.c:374
do_writepages+0x27a/0x600 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:419
gfs2_fsync+0x1ef/0x380 fs/gfs2/file.c:752
vfs_fsync_range+0x139/0x220 fs/sync.c:187
generic_write_sync include/linux/fs.h:3036 [inline]
gfs2_file_write_iter+0xc18/0x11a0 fs/gfs2/file.c:1168
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888058792150
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff888058792150, ffff8880587921a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58792
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405ee640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13594, tgid 13593 (syz.1.1945), ts 902654675755, free_ts 902633969557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab mm/slub.c:2660 [inline]
new_slab+0x247/0x330 mm/slub.c:2714
___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
update_statfs+0x10b/0x4a0 fs/gfs2/super.c:251
gfs2_statfs_sync+0x450/0x560 fs/gfs2/super.c:296
gfs2_make_fs_ro+0x1c7/0x370 fs/gfs2/super.c:548
gfs2_reconfigure+0x8b9/0xf10 fs/gfs2/ops_fstype.c:1597
reconfigure_super+0x450/0xb60 fs/super.c:1077
do_remount fs/namespace.c:3264 [inline]
path_mount+0x1808/0x2060 fs/namespace.c:4057
do_mount fs/namespace.c:4078 [inline]
__do_sys_mount fs/namespace.c:4278 [inline]
__se_sys_mount fs/namespace.c:4255 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4255
page last free pid 6072 tgid 6072 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888058792000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
ffff888058792080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888058792100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
^
ffff888058792180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
ffff888058792200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x1d4/0x200 lib/list_debug.c:62
Read of size 8 at addr ffff888058792168 by task syz-executor/26409
CPU: 1 UID: 0 PID: 26409 Comm: syz-executor Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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
__list_del_entry_valid_or_report+0x1d4/0x200 lib/list_debug.c:62
__list_del_entry_valid include/linux/list.h:124 [inline]
__list_del_entry include/linux/list.h:215 [inline]
list_del_init include/linux/list.h:287 [inline]
gfs2_remove_from_journal+0x2ae/0x8d0 fs/gfs2/meta_io.c:355
gfs2_discard fs/gfs2/aops.c:597 [inline]
gfs2_invalidate_folio+0x333/0x840 fs/gfs2/aops.c:631
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2f6/0x490 mm/truncate.c:160
truncate_inode_pages_range+0x24e/0xe50 mm/truncate.c:379
gfs2_evict_inode+0x71c/0x1a30 fs/gfs2/super.c:1439
evict+0x3e6/0x920 fs/inode.c:810
iput_final fs/inode.c:1914 [inline]
iput.part.0+0x6a9/0xb00 fs/inode.c:1966
iput+0x35/0x40 fs/inode.c:1929
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1763 [inline]
gfs2_kill_sb+0x2da/0x420 fs/gfs2/ops_fstype.c:1789
deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
deactivate_super fs/super.c:507 [inline]
deactivate_super+0xde/0x100 fs/super.c:503
cleanup_mnt+0x225/0x450 fs/namespace.c:1318
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111
x64_sys_call+0x14fa/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c458eec9
Code: Unable to access opcode bytes at 0x7f82c458ee9f.
RSP: 002b:00007ffe1d8dd568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f82c4611da2 RCX: 00007f82c458eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007ffe1d8db307 R09: 00007ffe1d8de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d8de7c0
R13: 00007f82c4611d7d R14: 00000000002d591c R15: 00007ffe1d8de800
Allocated by task 26907:
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:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_data+0x4b2/0x7f0 fs/gfs2/trans.c:209
gfs2_trans_add_databufs+0x12e/0x1b0 fs/gfs2/trans.c:246
gfs2_iomap_put_folio+0x3d8/0x490 fs/gfs2/bmap.c:995
__iomap_put_folio.isra.0+0x64/0x140 fs/iomap/buffered-io.c:776
iomap_write_iter fs/iomap/buffered-io.c:1020 [inline]
iomap_file_buffered_write+0x633/0xac0 fs/iomap/buffered-io.c:1071
gfs2_file_buffered_write+0x405/0xad0 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x9d8/0x11a0 fs/gfs2/file.c:1166
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 26907:
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:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4797
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_jdata_writepages+0x12a/0x170 fs/gfs2/aops.c:374
do_writepages+0x27a/0x600 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:419
gfs2_fsync+0x1ef/0x380 fs/gfs2/file.c:752
vfs_fsync_range+0x139/0x220 fs/sync.c:187
generic_write_sync include/linux/fs.h:3036 [inline]
gfs2_file_write_iter+0xc18/0x11a0 fs/gfs2/file.c:1168
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888058792150
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff888058792150, ffff8880587921a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58792
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405ee640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13594, tgid 13593 (syz.1.1945), ts 902654675755, free_ts 902633969557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab mm/slub.c:2660 [inline]
new_slab+0x247/0x330 mm/slub.c:2714
___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
update_statfs+0x10b/0x4a0 fs/gfs2/super.c:251
gfs2_statfs_sync+0x450/0x560 fs/gfs2/super.c:296
gfs2_make_fs_ro+0x1c7/0x370 fs/gfs2/super.c:548
gfs2_reconfigure+0x8b9/0xf10 fs/gfs2/ops_fstype.c:1597
reconfigure_super+0x450/0xb60 fs/super.c:1077
do_remount fs/namespace.c:3264 [inline]
path_mount+0x1808/0x2060 fs/namespace.c:4057
do_mount fs/namespace.c:4078 [inline]
__do_sys_mount fs/namespace.c:4278 [inline]
__se_sys_mount fs/namespace.c:4255 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4255
page last free pid 6072 tgid 6072 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888058792000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
ffff888058792080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888058792100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
^
ffff888058792180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
ffff888058792200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x1e1/0x200 lib/list_debug.c:65
Read of size 8 at addr ffff888058792170 by task syz-executor/26409
CPU: 1 UID: 0 PID: 26409 Comm: syz-executor Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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
__list_del_entry_valid_or_report+0x1e1/0x200 lib/list_debug.c:65
__list_del_entry_valid include/linux/list.h:124 [inline]
__list_del_entry include/linux/list.h:215 [inline]
list_del_init include/linux/list.h:287 [inline]
gfs2_remove_from_journal+0x2ae/0x8d0 fs/gfs2/meta_io.c:355
gfs2_discard fs/gfs2/aops.c:597 [inline]
gfs2_invalidate_folio+0x333/0x840 fs/gfs2/aops.c:631
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2f6/0x490 mm/truncate.c:160
truncate_inode_pages_range+0x24e/0xe50 mm/truncate.c:379
gfs2_evict_inode+0x71c/0x1a30 fs/gfs2/super.c:1439
evict+0x3e6/0x920 fs/inode.c:810
iput_final fs/inode.c:1914 [inline]
iput.part.0+0x6a9/0xb00 fs/inode.c:1966
iput+0x35/0x40 fs/inode.c:1929
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1763 [inline]
gfs2_kill_sb+0x2da/0x420 fs/gfs2/ops_fstype.c:1789
deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
deactivate_super fs/super.c:507 [inline]
deactivate_super+0xde/0x100 fs/super.c:503
cleanup_mnt+0x225/0x450 fs/namespace.c:1318
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111
x64_sys_call+0x14fa/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c458eec9
Code: Unable to access opcode bytes at 0x7f82c458ee9f.
RSP: 002b:00007ffe1d8dd568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f82c4611da2 RCX: 00007f82c458eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007ffe1d8db307 R09: 00007ffe1d8de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d8de7c0
R13: 00007f82c4611d7d R14: 00000000002d591c R15: 00007ffe1d8de800
Allocated by task 26907:
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:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_data+0x4b2/0x7f0 fs/gfs2/trans.c:209
gfs2_trans_add_databufs+0x12e/0x1b0 fs/gfs2/trans.c:246
gfs2_iomap_put_folio+0x3d8/0x490 fs/gfs2/bmap.c:995
__iomap_put_folio.isra.0+0x64/0x140 fs/iomap/buffered-io.c:776
iomap_write_iter fs/iomap/buffered-io.c:1020 [inline]
iomap_file_buffered_write+0x633/0xac0 fs/iomap/buffered-io.c:1071
gfs2_file_buffered_write+0x405/0xad0 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x9d8/0x11a0 fs/gfs2/file.c:1166
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 26907:
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:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4797
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_jdata_writepages+0x12a/0x170 fs/gfs2/aops.c:374
do_writepages+0x27a/0x600 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:419
gfs2_fsync+0x1ef/0x380 fs/gfs2/file.c:752
vfs_fsync_range+0x139/0x220 fs/sync.c:187
generic_write_sync include/linux/fs.h:3036 [inline]
gfs2_file_write_iter+0xc18/0x11a0 fs/gfs2/file.c:1168
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888058792150
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 32 bytes inside of
freed 80-byte region [ffff888058792150, ffff8880587921a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58792
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405ee640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13594, tgid 13593 (syz.1.1945), ts 902654675755, free_ts 902633969557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab mm/slub.c:2660 [inline]
new_slab+0x247/0x330 mm/slub.c:2714
___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
update_statfs+0x10b/0x4a0 fs/gfs2/super.c:251
gfs2_statfs_sync+0x450/0x560 fs/gfs2/super.c:296
gfs2_make_fs_ro+0x1c7/0x370 fs/gfs2/super.c:548
gfs2_reconfigure+0x8b9/0xf10 fs/gfs2/ops_fstype.c:1597
reconfigure_super+0x450/0xb60 fs/super.c:1077
do_remount fs/namespace.c:3264 [inline]
path_mount+0x1808/0x2060 fs/namespace.c:4057
do_mount fs/namespace.c:4078 [inline]
__do_sys_mount fs/namespace.c:4278 [inline]
__se_sys_mount fs/namespace.c:4255 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4255
page last free pid 6072 tgid 6072 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888058792000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
ffff888058792080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888058792100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
^
ffff888058792180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
ffff888058792200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry include/linux/list.h:218 [inline]
BUG: KASAN: slab-use-after-free in list_del_init include/linux/list.h:287 [inline]
BUG: KASAN: slab-use-after-free in gfs2_remove_from_journal+0x861/0x8d0 fs/gfs2/meta_io.c:355
Read of size 8 at addr ffff888058792168 by task syz-executor/26409
CPU: 1 UID: 0 PID: 26409 Comm: syz-executor Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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
__list_del_entry include/linux/list.h:218 [inline]
list_del_init include/linux/list.h:287 [inline]
gfs2_remove_from_journal+0x861/0x8d0 fs/gfs2/meta_io.c:355
gfs2_discard fs/gfs2/aops.c:597 [inline]
gfs2_invalidate_folio+0x333/0x840 fs/gfs2/aops.c:631
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2f6/0x490 mm/truncate.c:160
truncate_inode_pages_range+0x24e/0xe50 mm/truncate.c:379
gfs2_evict_inode+0x71c/0x1a30 fs/gfs2/super.c:1439
evict+0x3e6/0x920 fs/inode.c:810
iput_final fs/inode.c:1914 [inline]
iput.part.0+0x6a9/0xb00 fs/inode.c:1966
iput+0x35/0x40 fs/inode.c:1929
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1763 [inline]
gfs2_kill_sb+0x2da/0x420 fs/gfs2/ops_fstype.c:1789
deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
deactivate_super fs/super.c:507 [inline]
deactivate_super+0xde/0x100 fs/super.c:503
cleanup_mnt+0x225/0x450 fs/namespace.c:1318
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111
x64_sys_call+0x14fa/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c458eec9
Code: Unable to access opcode bytes at 0x7f82c458ee9f.
RSP: 002b:00007ffe1d8dd568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f82c4611da2 RCX: 00007f82c458eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007ffe1d8db307 R09: 00007ffe1d8de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d8de7c0
R13: 00007f82c4611d7d R14: 00000000002d591c R15: 00007ffe1d8de800
Allocated by task 26907:
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:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_data+0x4b2/0x7f0 fs/gfs2/trans.c:209
gfs2_trans_add_databufs+0x12e/0x1b0 fs/gfs2/trans.c:246
gfs2_iomap_put_folio+0x3d8/0x490 fs/gfs2/bmap.c:995
__iomap_put_folio.isra.0+0x64/0x140 fs/iomap/buffered-io.c:776
iomap_write_iter fs/iomap/buffered-io.c:1020 [inline]
iomap_file_buffered_write+0x633/0xac0 fs/iomap/buffered-io.c:1071
gfs2_file_buffered_write+0x405/0xad0 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x9d8/0x11a0 fs/gfs2/file.c:1166
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 26907:
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:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4797
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_jdata_writepages+0x12a/0x170 fs/gfs2/aops.c:374
do_writepages+0x27a/0x600 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:419
gfs2_fsync+0x1ef/0x380 fs/gfs2/file.c:752
vfs_fsync_range+0x139/0x220 fs/sync.c:187
generic_write_sync include/linux/fs.h:3036 [inline]
gfs2_file_write_iter+0xc18/0x11a0 fs/gfs2/file.c:1168
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888058792150
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff888058792150, ffff8880587921a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58792
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405ee640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13594, tgid 13593 (syz.1.1945), ts 902654675755, free_ts 902633969557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab mm/slub.c:2660 [inline]
new_slab+0x247/0x330 mm/slub.c:2714
___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
update_statfs+0x10b/0x4a0 fs/gfs2/super.c:251
gfs2_statfs_sync+0x450/0x560 fs/gfs2/super.c:296
gfs2_make_fs_ro+0x1c7/0x370 fs/gfs2/super.c:548
gfs2_reconfigure+0x8b9/0xf10 fs/gfs2/ops_fstype.c:1597
reconfigure_super+0x450/0xb60 fs/super.c:1077
do_remount fs/namespace.c:3264 [inline]
path_mount+0x1808/0x2060 fs/namespace.c:4057
do_mount fs/namespace.c:4078 [inline]
__do_sys_mount fs/namespace.c:4278 [inline]
__se_sys_mount fs/namespace.c:4255 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4255
page last free pid 6072 tgid 6072 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888058792000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
ffff888058792080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888058792100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
^
ffff888058792180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
ffff888058792200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry include/linux/list.h:218 [inline]
BUG: KASAN: slab-use-after-free in list_del_init include/linux/list.h:287 [inline]
BUG: KASAN: slab-use-after-free in gfs2_remove_from_journal+0x84a/0x8d0 fs/gfs2/meta_io.c:355
Read of size 8 at addr ffff888058792170 by task syz-executor/26409
CPU: 1 UID: 0 PID: 26409 Comm: syz-executor Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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
__list_del_entry include/linux/list.h:218 [inline]
list_del_init include/linux/list.h:287 [inline]
gfs2_remove_from_journal+0x84a/0x8d0 fs/gfs2/meta_io.c:355
gfs2_discard fs/gfs2/aops.c:597 [inline]
gfs2_invalidate_folio+0x333/0x840 fs/gfs2/aops.c:631
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2f6/0x490 mm/truncate.c:160
truncate_inode_pages_range+0x24e/0xe50 mm/truncate.c:379
gfs2_evict_inode+0x71c/0x1a30 fs/gfs2/super.c:1439
evict+0x3e6/0x920 fs/inode.c:810
iput_final fs/inode.c:1914 [inline]
iput.part.0+0x6a9/0xb00 fs/inode.c:1966
iput+0x35/0x40 fs/inode.c:1929
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1763 [inline]
gfs2_kill_sb+0x2da/0x420 fs/gfs2/ops_fstype.c:1789
deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
deactivate_super fs/super.c:507 [inline]
deactivate_super+0xde/0x100 fs/super.c:503
cleanup_mnt+0x225/0x450 fs/namespace.c:1318
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111
x64_sys_call+0x14fa/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c458eec9
Code: Unable to access opcode bytes at 0x7f82c458ee9f.
RSP: 002b:00007ffe1d8dd568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f82c4611da2 RCX: 00007f82c458eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007ffe1d8db307 R09: 00007ffe1d8de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d8de7c0
R13: 00007f82c4611d7d R14: 00000000002d591c R15: 00007ffe1d8de800
Allocated by task 26907:
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:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_data+0x4b2/0x7f0 fs/gfs2/trans.c:209
gfs2_trans_add_databufs+0x12e/0x1b0 fs/gfs2/trans.c:246
gfs2_iomap_put_folio+0x3d8/0x490 fs/gfs2/bmap.c:995
__iomap_put_folio.isra.0+0x64/0x140 fs/iomap/buffered-io.c:776
iomap_write_iter fs/iomap/buffered-io.c:1020 [inline]
iomap_file_buffered_write+0x633/0xac0 fs/iomap/buffered-io.c:1071
gfs2_file_buffered_write+0x405/0xad0 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x9d8/0x11a0 fs/gfs2/file.c:1166
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 26907:
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:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4797
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_jdata_writepages+0x12a/0x170 fs/gfs2/aops.c:374
do_writepages+0x27a/0x600 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:419
gfs2_fsync+0x1ef/0x380 fs/gfs2/file.c:752
vfs_fsync_range+0x139/0x220 fs/sync.c:187
generic_write_sync include/linux/fs.h:3036 [inline]
gfs2_file_write_iter+0xc18/0x11a0 fs/gfs2/file.c:1168
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888058792150
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 32 bytes inside of
freed 80-byte region [ffff888058792150, ffff8880587921a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58792
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405ee640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13594, tgid 13593 (syz.1.1945), ts 902654675755, free_ts 902633969557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab mm/slub.c:2660 [inline]
new_slab+0x247/0x330 mm/slub.c:2714
___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
update_statfs+0x10b/0x4a0 fs/gfs2/super.c:251
gfs2_statfs_sync+0x450/0x560 fs/gfs2/super.c:296
gfs2_make_fs_ro+0x1c7/0x370 fs/gfs2/super.c:548
gfs2_reconfigure+0x8b9/0xf10 fs/gfs2/ops_fstype.c:1597
reconfigure_super+0x450/0xb60 fs/super.c:1077
do_remount fs/namespace.c:3264 [inline]
path_mount+0x1808/0x2060 fs/namespace.c:4057
do_mount fs/namespace.c:4078 [inline]
__do_sys_mount fs/namespace.c:4278 [inline]
__se_sys_mount fs/namespace.c:4255 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4255
page last free pid 6072 tgid 6072 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888058792000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
ffff888058792080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888058792100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
^
ffff888058792180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
ffff888058792200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del include/linux/list.h:195 [inline]
BUG: KASAN: slab-use-after-free in __list_del_entry include/linux/list.h:218 [inline]
BUG: KASAN: slab-use-after-free in list_del_init include/linux/list.h:287 [inline]
BUG: KASAN: slab-use-after-free in gfs2_remove_from_journal+0x824/0x8d0 fs/gfs2/meta_io.c:355
Write of size 8 at addr ffff888058792170 by task syz-executor/26409
CPU: 1 UID: 0 PID: 26409 Comm: syz-executor Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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
__list_del include/linux/list.h:195 [inline]
__list_del_entry include/linux/list.h:218 [inline]
list_del_init include/linux/list.h:287 [inline]
gfs2_remove_from_journal+0x824/0x8d0 fs/gfs2/meta_io.c:355
gfs2_discard fs/gfs2/aops.c:597 [inline]
gfs2_invalidate_folio+0x333/0x840 fs/gfs2/aops.c:631
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x2f6/0x490 mm/truncate.c:160
truncate_inode_pages_range+0x24e/0xe50 mm/truncate.c:379
gfs2_evict_inode+0x71c/0x1a30 fs/gfs2/super.c:1439
evict+0x3e6/0x920 fs/inode.c:810
iput_final fs/inode.c:1914 [inline]
iput.part.0+0x6a9/0xb00 fs/inode.c:1966
iput+0x35/0x40 fs/inode.c:1929
gfs2_evict_inodes fs/gfs2/ops_fstype.c:1763 [inline]
gfs2_kill_sb+0x2da/0x420 fs/gfs2/ops_fstype.c:1789
deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
deactivate_super fs/super.c:507 [inline]
deactivate_super+0xde/0x100 fs/super.c:503
cleanup_mnt+0x225/0x450 fs/namespace.c:1318
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111
x64_sys_call+0x14fa/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c458eec9
Code: Unable to access opcode bytes at 0x7f82c458ee9f.
RSP: 002b:00007ffe1d8dd568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f82c4611da2 RCX: 00007f82c458eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007ffe1d8db307 R09: 00007ffe1d8de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d8de7c0
R13: 00007f82c4611d7d R14: 00000000002d591c R15: 00007ffe1d8de800
Allocated by task 26907:
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:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_data+0x4b2/0x7f0 fs/gfs2/trans.c:209
gfs2_trans_add_databufs+0x12e/0x1b0 fs/gfs2/trans.c:246
gfs2_iomap_put_folio+0x3d8/0x490 fs/gfs2/bmap.c:995
__iomap_put_folio.isra.0+0x64/0x140 fs/iomap/buffered-io.c:776
iomap_write_iter fs/iomap/buffered-io.c:1020 [inline]
iomap_file_buffered_write+0x633/0xac0 fs/iomap/buffered-io.c:1071
gfs2_file_buffered_write+0x405/0xad0 fs/gfs2/file.c:1061
gfs2_file_write_iter+0x9d8/0x11a0 fs/gfs2/file.c:1166
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 26907:
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:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4797
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_jdata_writepages+0x12a/0x170 fs/gfs2/aops.c:374
do_writepages+0x27a/0x600 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:419
gfs2_fsync+0x1ef/0x380 fs/gfs2/file.c:752
vfs_fsync_range+0x139/0x220 fs/sync.c:187
generic_write_sync include/linux/fs.h:3036 [inline]
gfs2_file_write_iter+0xc18/0x11a0 fs/gfs2/file.c:1168
aio_write+0x3b9/0x910 fs/aio.c:1634
__io_submit_one fs/aio.c:2006 [inline]
io_submit_one+0x1243/0x1df0 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit fs/aio.c:2082 [inline]
__x64_sys_io_submit+0x1a9/0x350 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888058792150
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 32 bytes inside of
freed 80-byte region [ffff888058792150, ffff8880587921a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58792
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405ee640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13594, tgid 13593 (syz.1.1945), ts 902654675755, free_ts 902633969557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab mm/slub.c:2660 [inline]
new_slab+0x247/0x330 mm/slub.c:2714
___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4247
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
update_statfs+0x10b/0x4a0 fs/gfs2/super.c:251
gfs2_statfs_sync+0x450/0x560 fs/gfs2/super.c:296
gfs2_make_fs_ro+0x1c7/0x370 fs/gfs2/super.c:548
gfs2_reconfigure+0x8b9/0xf10 fs/gfs2/ops_fstype.c:1597
reconfigure_super+0x450/0xb60 fs/super.c:1077
do_remount fs/namespace.c:3264 [inline]
path_mount+0x1808/0x2060 fs/namespace.c:4057
do_mount fs/namespace.c:4078 [inline]
__do_sys_mount fs/namespace.c:4278 [inline]
__se_sys_mount fs/namespace.c:4255 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4255
page last free pid 6072 tgid 6072 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff888058792000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
ffff888058792080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888058792100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
^
ffff888058792180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
ffff888058792200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================