==================================================================
BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:381 [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 ffff88805e39d1d8 by task syz-executor/6387
CPU: 1 UID: 0 PID: 6387 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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:381 [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:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xde/0x100 fs/super.c:502
cleanup_mnt+0x225/0x450 fs/namespace.c:1327
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+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c1ab901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd6b76d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1c1ac11d7d RCX: 00007f1c1ab901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6b76d320
RBP: 00007ffd6b76d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6b76e3b0
R13: 00007f1c1ac11d7d R14: 000000000005b67e R15: 00007ffd6b76e3f0
Allocated by task 9066:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5272
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
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9085:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_logd+0x298/0x13e0 fs/gfs2/log.c:1323
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88805e39d1c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff88805e39d1c0, ffff88805e39d210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e39d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88814328e000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000240024 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 9066, tgid 9065 (syz.6.732), ts 373759963738, free_ts 373740721107
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5272
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x8ab/0xae0 fs/gfs2/file.c:311
vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
ioctl_setflags+0x1c1/0x210 fs/file_attr.c:336
do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 9084 tgid 9083 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_complete_munmap_vmas+0x1ca/0x970 mm/vma.c:1277
do_vmi_align_munmap+0x446/0x7e0 mm/vma.c:1536
do_vmi_munmap+0x204/0x3e0 mm/vma.c:1584
__vm_munmap+0x196/0x380 mm/vma.c:3156
__do_sys_munmap mm/mmap.c:1080 [inline]
__se_sys_munmap mm/mmap.c:1077 [inline]
__x64_sys_munmap+0x59/0x80 mm/mmap.c:1077
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88805e39d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff88805e39d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff88805e39d180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88805e39d200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff88805e39d280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================
==================================================================
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 ffff88805e39d1e0 by task syz-executor/6387
CPU: 1 UID: 0 PID: 6387 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 10/02/2025
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:132 [inline]
__list_del_entry include/linux/list.h:223 [inline]
list_del_init include/linux/list.h:295 [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:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xde/0x100 fs/super.c:502
cleanup_mnt+0x225/0x450 fs/namespace.c:1327
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+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c1ab901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd6b76d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1c1ac11d7d RCX: 00007f1c1ab901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6b76d320
RBP: 00007ffd6b76d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6b76e3b0
R13: 00007f1c1ac11d7d R14: 000000000005b67e R15: 00007ffd6b76e3f0
Allocated by task 9066:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5272
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
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9085:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_logd+0x298/0x13e0 fs/gfs2/log.c:1323
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88805e39d1c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 32 bytes inside of
freed 80-byte region [ffff88805e39d1c0, ffff88805e39d210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e39d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88814328e000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000240024 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 9066, tgid 9065 (syz.6.732), ts 373759963738, free_ts 373740721107
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5272
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x8ab/0xae0 fs/gfs2/file.c:311
vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
ioctl_setflags+0x1c1/0x210 fs/file_attr.c:336
do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 9084 tgid 9083 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_complete_munmap_vmas+0x1ca/0x970 mm/vma.c:1277
do_vmi_align_munmap+0x446/0x7e0 mm/vma.c:1536
do_vmi_munmap+0x204/0x3e0 mm/vma.c:1584
__vm_munmap+0x196/0x380 mm/vma.c:3156
__do_sys_munmap mm/mmap.c:1080 [inline]
__se_sys_munmap mm/mmap.c:1077 [inline]
__x64_sys_munmap+0x59/0x80 mm/mmap.c:1077
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88805e39d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff88805e39d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff88805e39d180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88805e39d200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff88805e39d280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================
==================================================================
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 ffff88805e39d1d8 by task syz-executor/6387
CPU: 1 UID: 0 PID: 6387 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 10/02/2025
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:132 [inline]
__list_del_entry include/linux/list.h:223 [inline]
list_del_init include/linux/list.h:295 [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:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xde/0x100 fs/super.c:502
cleanup_mnt+0x225/0x450 fs/namespace.c:1327
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+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c1ab901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd6b76d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1c1ac11d7d RCX: 00007f1c1ab901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6b76d320
RBP: 00007ffd6b76d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6b76e3b0
R13: 00007f1c1ac11d7d R14: 000000000005b67e R15: 00007ffd6b76e3f0
Allocated by task 9066:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5272
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
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9085:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_logd+0x298/0x13e0 fs/gfs2/log.c:1323
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88805e39d1c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff88805e39d1c0, ffff88805e39d210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e39d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88814328e000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000240024 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 9066, tgid 9065 (syz.6.732), ts 373759963738, free_ts 373740721107
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5272
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x8ab/0xae0 fs/gfs2/file.c:311
vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
ioctl_setflags+0x1c1/0x210 fs/file_attr.c:336
do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 9084 tgid 9083 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_complete_munmap_vmas+0x1ca/0x970 mm/vma.c:1277
do_vmi_align_munmap+0x446/0x7e0 mm/vma.c:1536
do_vmi_munmap+0x204/0x3e0 mm/vma.c:1584
__vm_munmap+0x196/0x380 mm/vma.c:3156
__do_sys_munmap mm/mmap.c:1080 [inline]
__se_sys_munmap mm/mmap.c:1077 [inline]
__x64_sys_munmap+0x59/0x80 mm/mmap.c:1077
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88805e39d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff88805e39d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff88805e39d180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88805e39d200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff88805e39d280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================
==================================================================
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 ffff88805e39d1d8 by task syz-executor/6387
CPU: 1 UID: 0 PID: 6387 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 10/02/2025
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:132 [inline]
__list_del_entry include/linux/list.h:223 [inline]
list_del_init include/linux/list.h:295 [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:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xde/0x100 fs/super.c:502
cleanup_mnt+0x225/0x450 fs/namespace.c:1327
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+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c1ab901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd6b76d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1c1ac11d7d RCX: 00007f1c1ab901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6b76d320
RBP: 00007ffd6b76d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6b76e3b0
R13: 00007f1c1ac11d7d R14: 000000000005b67e R15: 00007ffd6b76e3f0
Allocated by task 9066:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5272
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
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9085:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_logd+0x298/0x13e0 fs/gfs2/log.c:1323
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88805e39d1c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff88805e39d1c0, ffff88805e39d210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e39d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88814328e000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000240024 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 9066, tgid 9065 (syz.6.732), ts 373759963738, free_ts 373740721107
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5272
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x8ab/0xae0 fs/gfs2/file.c:311
vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
ioctl_setflags+0x1c1/0x210 fs/file_attr.c:336
do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 9084 tgid 9083 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_complete_munmap_vmas+0x1ca/0x970 mm/vma.c:1277
do_vmi_align_munmap+0x446/0x7e0 mm/vma.c:1536
do_vmi_munmap+0x204/0x3e0 mm/vma.c:1584
__vm_munmap+0x196/0x380 mm/vma.c:3156
__do_sys_munmap mm/mmap.c:1080 [inline]
__se_sys_munmap mm/mmap.c:1077 [inline]
__x64_sys_munmap+0x59/0x80 mm/mmap.c:1077
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88805e39d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff88805e39d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff88805e39d180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88805e39d200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff88805e39d280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================
==================================================================
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 ffff88805e39d1e0 by task syz-executor/6387
CPU: 1 UID: 0 PID: 6387 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 10/02/2025
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:132 [inline]
__list_del_entry include/linux/list.h:223 [inline]
list_del_init include/linux/list.h:295 [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:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xde/0x100 fs/super.c:502
cleanup_mnt+0x225/0x450 fs/namespace.c:1327
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+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c1ab901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd6b76d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1c1ac11d7d RCX: 00007f1c1ab901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6b76d320
RBP: 00007ffd6b76d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6b76e3b0
R13: 00007f1c1ac11d7d R14: 000000000005b67e R15: 00007ffd6b76e3f0
Allocated by task 9066:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5272
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
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9085:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_logd+0x298/0x13e0 fs/gfs2/log.c:1323
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88805e39d1c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 32 bytes inside of
freed 80-byte region [ffff88805e39d1c0, ffff88805e39d210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e39d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88814328e000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000240024 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 9066, tgid 9065 (syz.6.732), ts 373759963738, free_ts 373740721107
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5272
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x8ab/0xae0 fs/gfs2/file.c:311
vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
ioctl_setflags+0x1c1/0x210 fs/file_attr.c:336
do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 9084 tgid 9083 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_complete_munmap_vmas+0x1ca/0x970 mm/vma.c:1277
do_vmi_align_munmap+0x446/0x7e0 mm/vma.c:1536
do_vmi_munmap+0x204/0x3e0 mm/vma.c:1584
__vm_munmap+0x196/0x380 mm/vma.c:3156
__do_sys_munmap mm/mmap.c:1080 [inline]
__se_sys_munmap mm/mmap.c:1077 [inline]
__x64_sys_munmap+0x59/0x80 mm/mmap.c:1077
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88805e39d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff88805e39d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff88805e39d180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88805e39d200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff88805e39d280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry include/linux/list.h:226 [inline]
BUG: KASAN: slab-use-after-free in list_del_init include/linux/list.h:295 [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 ffff88805e39d1d8 by task syz-executor/6387
CPU: 1 UID: 0 PID: 6387 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 10/02/2025
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:226 [inline]
list_del_init include/linux/list.h:295 [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:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xde/0x100 fs/super.c:502
cleanup_mnt+0x225/0x450 fs/namespace.c:1327
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+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c1ab901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd6b76d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1c1ac11d7d RCX: 00007f1c1ab901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6b76d320
RBP: 00007ffd6b76d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6b76e3b0
R13: 00007f1c1ac11d7d R14: 000000000005b67e R15: 00007ffd6b76e3f0
Allocated by task 9066:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5272
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
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9085:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_logd+0x298/0x13e0 fs/gfs2/log.c:1323
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88805e39d1c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
freed 80-byte region [ffff88805e39d1c0, ffff88805e39d210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e39d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88814328e000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000240024 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 9066, tgid 9065 (syz.6.732), ts 373759963738, free_ts 373740721107
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5272
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x8ab/0xae0 fs/gfs2/file.c:311
vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
ioctl_setflags+0x1c1/0x210 fs/file_attr.c:336
do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 9084 tgid 9083 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_complete_munmap_vmas+0x1ca/0x970 mm/vma.c:1277
do_vmi_align_munmap+0x446/0x7e0 mm/vma.c:1536
do_vmi_munmap+0x204/0x3e0 mm/vma.c:1584
__vm_munmap+0x196/0x380 mm/vma.c:3156
__do_sys_munmap mm/mmap.c:1080 [inline]
__se_sys_munmap mm/mmap.c:1077 [inline]
__x64_sys_munmap+0x59/0x80 mm/mmap.c:1077
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88805e39d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff88805e39d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff88805e39d180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88805e39d200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff88805e39d280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry include/linux/list.h:226 [inline]
BUG: KASAN: slab-use-after-free in list_del_init include/linux/list.h:295 [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 ffff88805e39d1e0 by task syz-executor/6387
CPU: 1 UID: 0 PID: 6387 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 10/02/2025
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:226 [inline]
list_del_init include/linux/list.h:295 [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:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xde/0x100 fs/super.c:502
cleanup_mnt+0x225/0x450 fs/namespace.c:1327
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+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c1ab901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd6b76d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1c1ac11d7d RCX: 00007f1c1ab901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6b76d320
RBP: 00007ffd6b76d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6b76e3b0
R13: 00007f1c1ac11d7d R14: 000000000005b67e R15: 00007ffd6b76e3f0
Allocated by task 9066:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5272
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
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9085:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_logd+0x298/0x13e0 fs/gfs2/log.c:1323
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88805e39d1c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 32 bytes inside of
freed 80-byte region [ffff88805e39d1c0, ffff88805e39d210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e39d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88814328e000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000240024 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 9066, tgid 9065 (syz.6.732), ts 373759963738, free_ts 373740721107
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5272
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x8ab/0xae0 fs/gfs2/file.c:311
vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
ioctl_setflags+0x1c1/0x210 fs/file_attr.c:336
do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 9084 tgid 9083 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_complete_munmap_vmas+0x1ca/0x970 mm/vma.c:1277
do_vmi_align_munmap+0x446/0x7e0 mm/vma.c:1536
do_vmi_munmap+0x204/0x3e0 mm/vma.c:1584
__vm_munmap+0x196/0x380 mm/vma.c:3156
__do_sys_munmap mm/mmap.c:1080 [inline]
__se_sys_munmap mm/mmap.c:1077 [inline]
__x64_sys_munmap+0x59/0x80 mm/mmap.c:1077
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88805e39d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff88805e39d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff88805e39d180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88805e39d200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff88805e39d280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in __list_del include/linux/list.h:203 [inline]
BUG: KASAN: slab-use-after-free in __list_del_entry include/linux/list.h:226 [inline]
BUG: KASAN: slab-use-after-free in list_del_init include/linux/list.h:295 [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 ffff88805e39d1e0 by task syz-executor/6387
CPU: 1 UID: 0 PID: 6387 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 10/02/2025
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:203 [inline]
__list_del_entry include/linux/list.h:226 [inline]
list_del_init include/linux/list.h:295 [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:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xde/0x100 fs/super.c:502
cleanup_mnt+0x225/0x450 fs/namespace.c:1327
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+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c1ab901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd6b76d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1c1ac11d7d RCX: 00007f1c1ab901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6b76d320
RBP: 00007ffd6b76d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6b76e3b0
R13: 00007f1c1ac11d7d R14: 000000000005b67e R15: 00007ffd6b76e3f0
Allocated by task 9066:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5272
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
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9085:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
trans_drain fs/gfs2/log.c:1025 [inline]
gfs2_log_flush+0x1560/0x29a0 fs/gfs2/log.c:1165
gfs2_logd+0x298/0x13e0 fs/gfs2/log.c:1323
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88805e39d1c0
which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 32 bytes inside of
freed 80-byte region [ffff88805e39d1c0, ffff88805e39d210)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e39d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88814328e000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000240024 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 9066, tgid 9065 (syz.6.732), ts 373759963738, free_ts 373740721107
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5272
gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
gfs2_trans_add_meta+0x931/0xdd0 fs/gfs2/trans.c:272
do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
gfs2_fileattr_set+0x8ab/0xae0 fs/gfs2/file.c:311
vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
ioctl_setflags+0x1c1/0x210 fs/file_attr.c:336
do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
__do_sys_ioctl fs/ioctl.c:595 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 9084 tgid 9083 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_complete_munmap_vmas+0x1ca/0x970 mm/vma.c:1277
do_vmi_align_munmap+0x446/0x7e0 mm/vma.c:1536
do_vmi_munmap+0x204/0x3e0 mm/vma.c:1584
__vm_munmap+0x196/0x380 mm/vma.c:3156
__do_sys_munmap mm/mmap.c:1080 [inline]
__se_sys_munmap mm/mmap.c:1077 [inline]
__x64_sys_munmap+0x59/0x80 mm/mmap.c:1077
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88805e39d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
ffff88805e39d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
>ffff88805e39d180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88805e39d200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
ffff88805e39d280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
==================================================================