==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:336 [inline]
BUG: KASAN: slab-use-after-free in move_to_new_folio+0xef/0x400 mm/migrate.c:1065
Read of size 8 at addr ffff8880788d13a0 by task syz.6.11608/1392
CPU: 0 UID: 0 PID: 1392 Comm: syz.6.11608 Not tainted 6.16.0-syzkaller-10355-gf2d282e1dfb3 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
mapping_inaccessible include/linux/pagemap.h:336 [inline]
move_to_new_folio+0xef/0x400 mm/migrate.c:1065
migrate_folio_move mm/migrate.c:1348 [inline]
migrate_folios_move mm/migrate.c:1697 [inline]
migrate_pages_batch+0x1fab/0x3bd0 mm/migrate.c:1944
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1974
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2083
compact_zone+0x2018/0x4760 mm/compaction.c:2647
compact_node+0x1a4/0x2d0 mm/compaction.c:2916
compact_nodes mm/compaction.c:2938 [inline]
sysctl_compaction_handler mm/compaction.c:2989 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2976
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36c158eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36c23e5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f36c17b5fa0 RCX: 00007f36c158eb69
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f36c1611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36c17b5fa0 R15: 00007ffd6c00e3d8
Allocated by task 31875:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4782
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
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
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2184
__queue_work+0x97e/0x1160 kernel/workqueue.c:2339
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2507
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2559
queue_delayed_work include/linux/workqueue.h:684 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880788d0fd8
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 968 bytes inside of
freed 1224-byte region [ffff8880788d0fd8, ffff8880788d14a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880788d0548 pfn:0x788d0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
raw: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
head: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001e23401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 31875, tgid 31874 (syz.6.10882), ts 1229886871877, free_ts 1229839928771
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:2487 [inline]
allocate_slab mm/slub.c:2655 [inline]
new_slab+0x247/0x330 mm/slub.c:2709
___slab_alloc+0xd1e/0x1780 mm/slub.c:3891
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 5206 tgid 5206 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
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
locks_alloc_lock fs/locks.c:275 [inline]
flock_lock_inode+0xbe8/0x1030 fs/locks.c:1091
flock_lock_inode_wait fs/locks.c:2084 [inline]
locks_lock_inode_wait+0x1da/0x490 fs/locks.c:2111
locks_lock_file_wait include/linux/filelock.h:427 [inline]
__do_sys_flock+0x446/0x520 fs/locks.c:2179
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880788d1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880788d1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880788d1400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
BUG: KASAN: slab-use-after-free in arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:336 [inline]
BUG: KASAN: slab-use-after-free in move_to_new_folio+0x3bf/0x400 mm/migrate.c:1065
Read of size 8 at addr ffff8880788d13a0 by task syz.6.11608/1392
CPU: 0 UID: 0 PID: 1392 Comm: syz.6.11608 Tainted: G B 6.16.0-syzkaller-10355-gf2d282e1dfb3 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
mapping_inaccessible include/linux/pagemap.h:336 [inline]
move_to_new_folio+0x3bf/0x400 mm/migrate.c:1065
migrate_folio_move mm/migrate.c:1348 [inline]
migrate_folios_move mm/migrate.c:1697 [inline]
migrate_pages_batch+0x1fab/0x3bd0 mm/migrate.c:1944
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1974
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2083
compact_zone+0x2018/0x4760 mm/compaction.c:2647
compact_node+0x1a4/0x2d0 mm/compaction.c:2916
compact_nodes mm/compaction.c:2938 [inline]
sysctl_compaction_handler mm/compaction.c:2989 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2976
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36c158eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36c23e5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f36c17b5fa0 RCX: 00007f36c158eb69
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f36c1611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36c17b5fa0 R15: 00007ffd6c00e3d8
Allocated by task 31875:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4782
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
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
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2184
__queue_work+0x97e/0x1160 kernel/workqueue.c:2339
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2507
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2559
queue_delayed_work include/linux/workqueue.h:684 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880788d0fd8
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 968 bytes inside of
freed 1224-byte region [ffff8880788d0fd8, ffff8880788d14a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880788d0548 pfn:0x788d0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
raw: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
head: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001e23401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 31875, tgid 31874 (syz.6.10882), ts 1229886871877, free_ts 1229839928771
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:2487 [inline]
allocate_slab mm/slub.c:2655 [inline]
new_slab+0x247/0x330 mm/slub.c:2709
___slab_alloc+0xd1e/0x1780 mm/slub.c:3891
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 5206 tgid 5206 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
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
locks_alloc_lock fs/locks.c:275 [inline]
flock_lock_inode+0xbe8/0x1030 fs/locks.c:1091
flock_lock_inode_wait fs/locks.c:2084 [inline]
locks_lock_inode_wait+0x1da/0x490 fs/locks.c:2111
locks_lock_file_wait include/linux/filelock.h:427 [inline]
__do_sys_flock+0x446/0x520 fs/locks.c:2179
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880788d1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880788d1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880788d1400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in move_to_new_folio+0x3d3/0x400 mm/migrate.c:1067
Read of size 8 at addr ffff8880788d1398 by task syz.6.11608/1392
CPU: 1 UID: 0 PID: 1392 Comm: syz.6.11608 Tainted: G B 6.16.0-syzkaller-10355-gf2d282e1dfb3 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
move_to_new_folio+0x3d3/0x400 mm/migrate.c:1067
migrate_folio_move mm/migrate.c:1348 [inline]
migrate_folios_move mm/migrate.c:1697 [inline]
migrate_pages_batch+0x1fab/0x3bd0 mm/migrate.c:1944
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1974
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2083
compact_zone+0x2018/0x4760 mm/compaction.c:2647
compact_node+0x1a4/0x2d0 mm/compaction.c:2916
compact_nodes mm/compaction.c:2938 [inline]
sysctl_compaction_handler mm/compaction.c:2989 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2976
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36c158eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36c23e5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f36c17b5fa0 RCX: 00007f36c158eb69
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f36c1611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36c17b5fa0 R15: 00007ffd6c00e3d8
Allocated by task 31875:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4782
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
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
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2184
__queue_work+0x97e/0x1160 kernel/workqueue.c:2339
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2507
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2559
queue_delayed_work include/linux/workqueue.h:684 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880788d0fd8
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 960 bytes inside of
freed 1224-byte region [ffff8880788d0fd8, ffff8880788d14a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880788d0548 pfn:0x788d0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
raw: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
head: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001e23401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 31875, tgid 31874 (syz.6.10882), ts 1229886871877, free_ts 1229839928771
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:2487 [inline]
allocate_slab mm/slub.c:2655 [inline]
new_slab+0x247/0x330 mm/slub.c:2709
___slab_alloc+0xd1e/0x1780 mm/slub.c:3891
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 5206 tgid 5206 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
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
locks_alloc_lock fs/locks.c:275 [inline]
flock_lock_inode+0xbe8/0x1030 fs/locks.c:1091
flock_lock_inode_wait fs/locks.c:2084 [inline]
locks_lock_inode_wait+0x1da/0x490 fs/locks.c:2111
locks_lock_file_wait include/linux/filelock.h:427 [inline]
__do_sys_flock+0x446/0x520 fs/locks.c:2179
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880788d1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880788d1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880788d1400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x26f/0x2b0 kernel/locking/spinlock_debug.c:115
Read of size 4 at addr ffff8880788d13b4 by task syz.6.11608/1392
CPU: 0 UID: 0 PID: 1392 Comm: syz.6.11608 Tainted: G B 6.16.0-syzkaller-10355-gf2d282e1dfb3 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
do_raw_spin_lock+0x26f/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:351 [inline]
__buffer_migrate_folio+0x40b/0x6d0 mm/migrate.c:926
move_to_new_folio+0x19f/0x400 mm/migrate.c:1075
migrate_folio_move mm/migrate.c:1348 [inline]
migrate_folios_move mm/migrate.c:1697 [inline]
migrate_pages_batch+0x1fab/0x3bd0 mm/migrate.c:1944
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1974
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2083
compact_zone+0x2018/0x4760 mm/compaction.c:2647
compact_node+0x1a4/0x2d0 mm/compaction.c:2916
compact_nodes mm/compaction.c:2938 [inline]
sysctl_compaction_handler mm/compaction.c:2989 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2976
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36c158eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36c23e5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f36c17b5fa0 RCX: 00007f36c158eb69
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f36c1611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36c17b5fa0 R15: 00007ffd6c00e3d8
Allocated by task 31875:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4782
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
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
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2184
__queue_work+0x97e/0x1160 kernel/workqueue.c:2339
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2507
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2559
queue_delayed_work include/linux/workqueue.h:684 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880788d0fd8
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 988 bytes inside of
freed 1224-byte region [ffff8880788d0fd8, ffff8880788d14a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880788d0548 pfn:0x788d0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
raw: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
head: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001e23401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 31875, tgid 31874 (syz.6.10882), ts 1229886871877, free_ts 1229839928771
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:2487 [inline]
allocate_slab mm/slub.c:2655 [inline]
new_slab+0x247/0x330 mm/slub.c:2709
___slab_alloc+0xd1e/0x1780 mm/slub.c:3891
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 5206 tgid 5206 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
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
locks_alloc_lock fs/locks.c:275 [inline]
flock_lock_inode+0xbe8/0x1030 fs/locks.c:1091
flock_lock_inode_wait fs/locks.c:2084 [inline]
locks_lock_inode_wait+0x1da/0x490 fs/locks.c:2111
locks_lock_file_wait include/linux/filelock.h:427 [inline]
__do_sys_flock+0x446/0x520 fs/locks.c:2179
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880788d1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880788d1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880788d1400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:87 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x27f/0x2b0 kernel/locking/spinlock_debug.c:115
Read of size 8 at addr ffff8880788d13c0 by task syz.6.11608/1392
CPU: 0 UID: 0 PID: 1392 Comm: syz.6.11608 Tainted: G B 6.16.0-syzkaller-10355-gf2d282e1dfb3 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
debug_spin_lock_before kernel/locking/spinlock_debug.c:87 [inline]
do_raw_spin_lock+0x27f/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:351 [inline]
__buffer_migrate_folio+0x40b/0x6d0 mm/migrate.c:926
move_to_new_folio+0x19f/0x400 mm/migrate.c:1075
migrate_folio_move mm/migrate.c:1348 [inline]
migrate_folios_move mm/migrate.c:1697 [inline]
migrate_pages_batch+0x1fab/0x3bd0 mm/migrate.c:1944
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1974
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2083
compact_zone+0x2018/0x4760 mm/compaction.c:2647
compact_node+0x1a4/0x2d0 mm/compaction.c:2916
compact_nodes mm/compaction.c:2938 [inline]
sysctl_compaction_handler mm/compaction.c:2989 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2976
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36c158eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36c23e5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f36c17b5fa0 RCX: 00007f36c158eb69
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f36c1611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36c17b5fa0 R15: 00007ffd6c00e3d8
Allocated by task 31875:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4782
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
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
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2184
__queue_work+0x97e/0x1160 kernel/workqueue.c:2339
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2507
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2559
queue_delayed_work include/linux/workqueue.h:684 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880788d0fd8
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 1000 bytes inside of
freed 1224-byte region [ffff8880788d0fd8, ffff8880788d14a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880788d0548 pfn:0x788d0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
raw: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
head: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001e23401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 31875, tgid 31874 (syz.6.10882), ts 1229886871877, free_ts 1229839928771
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:2487 [inline]
allocate_slab mm/slub.c:2655 [inline]
new_slab+0x247/0x330 mm/slub.c:2709
___slab_alloc+0xd1e/0x1780 mm/slub.c:3891
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 5206 tgid 5206 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
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
locks_alloc_lock fs/locks.c:275 [inline]
flock_lock_inode+0xbe8/0x1030 fs/locks.c:1091
flock_lock_inode_wait fs/locks.c:2084 [inline]
locks_lock_inode_wait+0x1da/0x490 fs/locks.c:2111
locks_lock_file_wait include/linux/filelock.h:427 [inline]
__do_sys_flock+0x446/0x520 fs/locks.c:2179
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880788d1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880788d1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880788d1400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:88 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x265/0x2b0 kernel/locking/spinlock_debug.c:115
Read of size 4 at addr ffff8880788d13b8 by task syz.6.11608/1392
CPU: 0 UID: 0 PID: 1392 Comm: syz.6.11608 Tainted: G B 6.16.0-syzkaller-10355-gf2d282e1dfb3 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
debug_spin_lock_before kernel/locking/spinlock_debug.c:88 [inline]
do_raw_spin_lock+0x265/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:351 [inline]
__buffer_migrate_folio+0x40b/0x6d0 mm/migrate.c:926
move_to_new_folio+0x19f/0x400 mm/migrate.c:1075
migrate_folio_move mm/migrate.c:1348 [inline]
migrate_folios_move mm/migrate.c:1697 [inline]
migrate_pages_batch+0x1fab/0x3bd0 mm/migrate.c:1944
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1974
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2083
compact_zone+0x2018/0x4760 mm/compaction.c:2647
compact_node+0x1a4/0x2d0 mm/compaction.c:2916
compact_nodes mm/compaction.c:2938 [inline]
sysctl_compaction_handler mm/compaction.c:2989 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2976
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36c158eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36c23e5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f36c17b5fa0 RCX: 00007f36c158eb69
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f36c1611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36c17b5fa0 R15: 00007ffd6c00e3d8
Allocated by task 31875:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4782
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
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
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2184
__queue_work+0x97e/0x1160 kernel/workqueue.c:2339
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2507
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2559
queue_delayed_work include/linux/workqueue.h:684 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880788d0fd8
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 992 bytes inside of
freed 1224-byte region [ffff8880788d0fd8, ffff8880788d14a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880788d0548 pfn:0x788d0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
raw: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
head: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001e23401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 31875, tgid 31874 (syz.6.10882), ts 1229886871877, free_ts 1229839928771
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:2487 [inline]
allocate_slab mm/slub.c:2655 [inline]
new_slab+0x247/0x330 mm/slub.c:2709
___slab_alloc+0xd1e/0x1780 mm/slub.c:3891
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 5206 tgid 5206 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
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
locks_alloc_lock fs/locks.c:275 [inline]
flock_lock_inode+0xbe8/0x1030 fs/locks.c:1091
flock_lock_inode_wait fs/locks.c:2084 [inline]
locks_lock_inode_wait+0x1da/0x490 fs/locks.c:2111
locks_lock_file_wait include/linux/filelock.h:427 [inline]
__do_sys_flock+0x446/0x520 fs/locks.c:2179
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880788d1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880788d1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880788d1400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
BUG: KASAN: slab-use-after-free in queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x11d/0x2b0 kernel/locking/spinlock_debug.c:116
Write of size 4 at addr ffff8880788d13b0 by task syz.6.11608/1392
CPU: 0 UID: 0 PID: 1392 Comm: syz.6.11608 Tainted: G B 6.16.0-syzkaller-10355-gf2d282e1dfb3 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
do_raw_spin_lock+0x11d/0x2b0 kernel/locking/spinlock_debug.c:116
spin_lock include/linux/spinlock.h:351 [inline]
__buffer_migrate_folio+0x40b/0x6d0 mm/migrate.c:926
move_to_new_folio+0x19f/0x400 mm/migrate.c:1075
migrate_folio_move mm/migrate.c:1348 [inline]
migrate_folios_move mm/migrate.c:1697 [inline]
migrate_pages_batch+0x1fab/0x3bd0 mm/migrate.c:1944
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1974
migrate_pages+0x1b67/0x23b0 mm/migrate.c:2083
compact_zone+0x2018/0x4760 mm/compaction.c:2647
compact_node+0x1a4/0x2d0 mm/compaction.c:2916
compact_nodes mm/compaction.c:2938 [inline]
sysctl_compaction_handler mm/compaction.c:2989 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2976
proc_sys_call_handler+0x440/0x570 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x91f/0x1150 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1158
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1227
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1425 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36c158eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36c23e5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f36c17b5fa0 RCX: 00007f36c158eb69
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f36c1611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36c17b5fa0 R15: 00007ffd6c00e3d8
Allocated by task 31875:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_dir_search+0x22a/0x2e0 fs/gfs2/dir.c:1665
gfs2_lookupi+0x4b7/0x6e0 fs/gfs2/inode.c:340
gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
init_journal fs/gfs2/ops_fstype.c:716 [inline]
init_inodes+0x869/0x2eb0 fs/gfs2/ops_fstype.c:851
gfs2_fill_super+0x1be2/0x2d30 fs/gfs2/ops_fstype.c:1253
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4782
gfs2_glock_dealloc+0xd0/0x150 fs/gfs2/glock.c:135
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
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
gfs2_glock_free+0x35/0x90 fs/gfs2/glock.c:178
glock_work_func+0x396/0x4d0 fs/gfs2/glock.c:1107
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
insert_work+0x36/0x230 kernel/workqueue.c:2184
__queue_work+0x97e/0x1160 kernel/workqueue.c:2339
__queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2507
queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2559
queue_delayed_work include/linux/workqueue.h:684 [inline]
gfs2_glock_queue_work+0x75/0x120 fs/gfs2/glock.c:250
clear_glock+0xa7/0xe0 fs/gfs2/glock.c:2153
glock_hash_walk+0x12c/0x1c0 fs/gfs2/glock.c:2083
gfs2_gl_hash_clear+0x103/0x780 fs/gfs2/glock.c:2209
gfs2_fill_super+0x2524/0x2d30 fs/gfs2/ops_fstype.c:1306
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
do_new_mount fs/namespace.c:3805 [inline]
path_mount+0x1482/0x1fd0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880788d0fd8
which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 984 bytes inside of
freed 1224-byte region [ffff8880788d0fd8, ffff8880788d14a0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880788d0548 pfn:0x788d0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
raw: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888146ef3b40 dead000000000122 0000000000000000
head: ffff8880788d0548 00000000800c0007 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001e23401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 31875, tgid 31874 (syz.6.10882), ts 1229886871877, free_ts 1229839928771
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:2487 [inline]
allocate_slab mm/slub.c:2655 [inline]
new_slab+0x247/0x330 mm/slub.c:2709
___slab_alloc+0xd1e/0x1780 mm/slub.c:3891
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4236
gfs2_glock_get+0x1e5/0x1230 fs/gfs2/glock.c:1182
gfs2_inode_lookup+0x277/0x8a0 fs/gfs2/inode.c:135
gfs2_lookup_root+0x57/0x130 fs/gfs2/ops_fstype.c:425
init_sb+0xae5/0x10d0 fs/gfs2/ops_fstype.c:494
gfs2_fill_super+0x1967/0x2d30 fs/gfs2/ops_fstype.c:1220
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1692
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8e/0x340 fs/super.c:1815
page last free pid 5206 tgid 5206 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
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
locks_alloc_lock fs/locks.c:275 [inline]
flock_lock_inode+0xbe8/0x1030 fs/locks.c:1091
flock_lock_inode_wait fs/locks.c:2084 [inline]
locks_lock_inode_wait+0x1da/0x490 fs/locks.c:2111
locks_lock_file_wait include/linux/filelock.h:427 [inline]
__do_sys_flock+0x446/0x520 fs/locks.c:2179
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880788d1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880788d1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880788d1400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880788d1480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================