==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
Read of size 8 at addr ffff88806d314578 by task pool_workqueue_/3
CPU: 1 PID: 3 Comm: pool_workqueue_ Not tainted 6.7.0-rc6-syzkaller-00248-g5254c0cbc92d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0x163/0x540 mm/kasan/report.c:475
kasan_report+0x142/0x170 mm/kasan/report.c:588
__lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline]
try_to_wake_up+0xb5/0x1440 kernel/sched/core.c:4226
call_timer_fn+0x17a/0x5f0 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x64f/0x860 kernel/time/timer.c:2022
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035
__do_softirq+0x2b8/0x939 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu+0xf1/0x1b0 kernel/softirq.c:632
irq_exit_rcu+0x9/0x20 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x97/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:synchronize_rcu+0x0/0x3e0 kernel/rcu/tree.c:3558
Code: b0 73 00 e9 84 fe ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 9b fe ff ff 4c 89 f7 e8 c9 b0 73 00 e9 8e fe ff ff 0f 1f 40 00 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48
RSP: 0018:ffffc90000087cf8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000010fa8 RCX: ffffffff925cf303
RDX: 0000777d569baa01 RSI: ffffffff8b6ab240 RDI: ffffffff8bbde0a0
RBP: ffffc90000087dd8 R08: ffffffff813ee8b1 R09: 1ffffffff25054c0
R10: dffffc0000000000 R11: fffffbfff25054c1 R12: ffffffff925c2a28
R13: 1ffff92000010fa4 R14: 0000000000000a03 R15: ffffc90000087d40
lockdep_unregister_key+0x4b3/0x540 kernel/locking/lockdep.c:6475
wq_unregister_lockdep kernel/workqueue.c:3902 [inline]
pwq_release_workfn+0x203/0x260 kernel/workqueue.c:4134
kthread_worker_fn+0x4ba/0xaa0 kernel/kthread.c:841
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Allocated by task 2:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6c/0x3c0 mm/slab.h:763
slab_alloc_node mm/slub.c:3478 [inline]
kmem_cache_alloc_node+0x1dd/0x310 mm/slub.c:3523
alloc_task_struct_node kernel/fork.c:173 [inline]
dup_task_struct+0x57/0x7d0 kernel/fork.c:1110
copy_process+0x5d1/0x3fb0 kernel/fork.c:2332
kernel_clone+0x222/0x840 kernel/fork.c:2907
kernel_thread+0x1bc/0x230 kernel/fork.c:2969
create_kthread kernel/kthread.c:411 [inline]
kthreadd+0x60c/0x810 kernel/kthread.c:764
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Freed by task 1037:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook mm/slub.c:1826 [inline]
slab_free mm/slub.c:3809 [inline]
kmem_cache_free+0x299/0x470 mm/slub.c:3831
put_task_struct include/linux/sched/task.h:136 [inline]
delayed_put_task_struct+0x115/0x2c0 kernel/exit.c:227
rcu_do_batch kernel/rcu/tree.c:2158 [inline]
rcu_core+0xad8/0x17c0 kernel/rcu/tree.c:2431
__do_softirq+0x2b8/0x939 kernel/softirq.c:553
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492
__call_rcu_common kernel/rcu/tree.c:2681 [inline]
call_rcu+0x167/0xa80 kernel/rcu/tree.c:2795
context_switch kernel/sched/core.c:5379 [inline]
__schedule+0x1969/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
nilfs_segctor_kill_thread fs/nilfs2/segment.c:2678 [inline]
nilfs_segctor_destroy fs/nilfs2/segment.c:2760 [inline]
nilfs_detach_log_writer+0x2e8/0xbe0 fs/nilfs2/segment.c:2849
nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:499
generic_shutdown_super+0x13a/0x2c0 fs/super.c:696
kill_block_super+0x44/0x90 fs/super.c:1667
deactivate_locked_super+0xc1/0x130 fs/super.c:484
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
task_work_run+0x24a/0x300 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x150 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x69/0x2a0 kernel/entry/common.c:296
do_syscall_64+0x52/0x110 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Second to last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492
__call_rcu_common kernel/rcu/tree.c:2681 [inline]
call_rcu+0x167/0xa80 kernel/rcu/tree.c:2795
release_task+0x16d2/0x1810
wait_task_zombie kernel/exit.c:1184 [inline]
wait_consider_task+0x1a94/0x2ef0 kernel/exit.c:1411
do_wait_thread kernel/exit.c:1474 [inline]
__do_wait+0x1af/0x840 kernel/exit.c:1592
do_wait+0x1d8/0x540 kernel/exit.c:1626
kernel_wait4+0x2a2/0x3e0 kernel/exit.c:1785
__do_sys_wait4 kernel/exit.c:1813 [inline]
__se_sys_wait4 kernel/exit.c:1809 [inline]
__x64_sys_wait4+0x134/0x1e0 kernel/exit.c:1809
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
The buggy address belongs to the object at ffff88806d313b80
which belongs to the cache task_struct of size 7360
The buggy address is located 2552 bytes inside of
freed 7360-byte region [ffff88806d313b80, ffff88806d315840)
The buggy address belongs to the physical page:
page:ffffea0001b4c400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6d310
head:ffffea0001b4c400 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88802925eec1
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888014e51500 ffffea0000742600 dead000000000002
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88802925eec1
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4914, tgid 4914 (dhcpcd-run-hook), ts 44727857774, free_ts 44687493171
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1544 [inline]
get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312
__alloc_pages+0x255/0x680 mm/page_alloc.c:4568
alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133
alloc_slab_page+0x6a/0x170 mm/slub.c:1870
allocate_slab mm/slub.c:2017 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2070
___slab_alloc+0xc8a/0x1330 mm/slub.c:3223
__slab_alloc mm/slub.c:3322 [inline]
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
kmem_cache_alloc_node+0x22b/0x310 mm/slub.c:3523
alloc_task_struct_node kernel/fork.c:173 [inline]
dup_task_struct+0x57/0x7d0 kernel/fork.c:1110
copy_process+0x5d1/0x3fb0 kernel/fork.c:2332
kernel_clone+0x222/0x840 kernel/fork.c:2907
__do_sys_clone kernel/fork.c:3050 [inline]
__se_sys_clone kernel/fork.c:3034 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:3034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1137 [inline]
free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
discard_slab mm/slub.c:2116 [inline]
__unfreeze_partials+0x1e0/0x220 mm/slub.c:2655
put_cpu_partial+0x17b/0x250 mm/slub.c:2731
__slab_free+0x2b6/0x390 mm/slub.c:3679
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6c/0x3c0 mm/slab.h:763
slab_alloc_node mm/slub.c:3478 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc+0x19e/0x2b0 mm/slub.c:3502
getname_flags+0xbc/0x4f0 fs/namei.c:140
vfs_fstatat+0x11c/0x190 fs/stat.c:298
__do_sys_newfstatat fs/stat.c:463 [inline]
__se_sys_newfstatat fs/stat.c:457 [inline]
__x64_sys_newfstatat+0x117/0x190 fs/stat.c:457
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Memory state around the buggy address:
ffff88806d314400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88806d314480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88806d314500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88806d314580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88806d314600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 73 00 jae 0x2
2: e9 84 fe ff ff jmp 0xfffffe8b
7: 44 89 f1 mov %r14d,%ecx
a: 80 e1 07 and $0x7,%cl
d: 80 c1 03 add $0x3,%cl
10: 38 c1 cmp %al,%cl
12: 0f 8c 9b fe ff ff jl 0xfffffeb3
18: 4c 89 f7 mov %r14,%rdi
1b: e8 c9 b0 73 00 call 0x73b0e9
20: e9 8e fe ff ff jmp 0xfffffeb3
25: 0f 1f 40 00 nopl 0x0(%rax)
* 29: f3 0f 1e fa endbr64 <-- trapping instruction
2d: 55 push %rbp
2e: 48 89 e5 mov %rsp,%rbp
31: 41 57 push %r15
33: 41 56 push %r14
35: 41 55 push %r13
37: 41 54 push %r12
39: 53 push %rbx
3a: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
3e: 48 rex.W