==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
Read of size 8 at addr ffff888017a789f8 by task syz-executor.3/10253
CPU: 1 PID: 10253 Comm: syz-executor.3 Not tainted 6.7.0-rc6-syzkaller-00078-ga4aebe936554 #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:console_flush_all+0x9c3/0xeb0 kernel/printk/printk.c:2973
Code: 48 21 c3 0f 85 fa 01 00 00 e8 f9 7b 1d 00 48 8b 5c 24 38 4d 85 f6 75 07 e8 ea 7b 1d 00 eb 06 e8 e3 7b 1d 00 fb 48 8b 44 24 58 <42> 0f b6 04 28 84 c0 0f 85 4a 02 00 00 0f b6 1b 31 ff 89 de e8 54
RSP: 0018:ffffc900033bebc0 EFLAGS: 00000293
RAX: 1ffff92000677dc4 RBX: ffffc900033bee20 RCX: ffff88801e18d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900033bed70 R08: ffffffff8170ee54 R09: 1ffffffff21bae6c
R10: dffffc0000000000 R11: fffffbfff21bae6d R12: ffffffff8e0cf140
R13: dffffc0000000000 R14: 0000000000000200 R15: ffffffff8e0cf198
console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3036
vprintk_emit+0x508/0x720 kernel/printk/printk.c:2303
_printk+0xd5/0x120 kernel/printk/printk.c:2328
__nilfs_msg+0x34d/0x410 fs/nilfs2/super.c:79
nilfs_clear_dirty_page+0x271/0x1110 fs/nilfs2/page.c:404
nilfs_clear_dirty_pages+0x1e0/0x370 fs/nilfs2/page.c:382
nilfs_writepages+0x11c/0x160 fs/nilfs2/inode.c:165
do_writepages+0x3a6/0x670 mm/page-writeback.c:2553
__writeback_single_inode+0x155/0xfc0 fs/fs-writeback.c:1625
writeback_single_inode+0x21b/0x7a0 fs/fs-writeback.c:1746
write_inode_now+0x1d3/0x260 fs/fs-writeback.c:2788
iput_final fs/inode.c:1764 [inline]
iput+0x5a0/0x900 fs/inode.c:1803
nilfs_dispose_list+0x51d/0x5c0 fs/nilfs2/segment.c:820
nilfs_segctor_destroy fs/nilfs2/segment.c:2774 [inline]
nilfs_detach_log_writer+0x7d3/0xbe0 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
RIP: 0033:0x7f4b41e7e017
Code: b0 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 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcf93b0ef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f4b41e7e017
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffcf93b0fb0
RBP: 00007ffcf93b0fb0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcf93b2070
R13: 00007f4b41ec83b9 R14: 00000000000e5ceb R15: 0000000000000016
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 5155:
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
do_nanosleep+0x196/0x5f0 kernel/time/hrtimer.c:2047
hrtimer_nanosleep+0x226/0x460 kernel/time/hrtimer.c:2100
__do_sys_nanosleep kernel/time/hrtimer.c:2135 [inline]
__se_sys_nanosleep kernel/time/hrtimer.c:2121 [inline]
__x64_sys_nanosleep+0x269/0x2c0 kernel/time/hrtimer.c:2121
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
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 ffff888017a78000
which belongs to the cache task_struct of size 7360
The buggy address is located 2552 bytes inside of
freed 7360-byte region [ffff888017a78000, ffff888017a79cc0)
The buggy address belongs to the physical page:
page:ffffea00005e9e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17a78
head:ffffea00005e9e00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888028743cc1
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888014e51500 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff888028743cc1
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 2, tgid 2 (kthreadd), ts 2121550482, free_ts 0
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_node include/linux/gfp.h:238 [inline]
alloc_slab_page+0x59/0x170 mm/slub.c:1872
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
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
page_owner free stack trace missing
Memory state around the buggy address:
ffff888017a78880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888017a78900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888017a78980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888017a78a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888017a78a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 48 21 c3 and %rax,%rbx
3: 0f 85 fa 01 00 00 jne 0x203
9: e8 f9 7b 1d 00 call 0x1d7c07
e: 48 8b 5c 24 38 mov 0x38(%rsp),%rbx
13: 4d 85 f6 test %r14,%r14
16: 75 07 jne 0x1f
18: e8 ea 7b 1d 00 call 0x1d7c07
1d: eb 06 jmp 0x25
1f: e8 e3 7b 1d 00 call 0x1d7c07
24: fb sti
25: 48 8b 44 24 58 mov 0x58(%rsp),%rax
* 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 4a 02 00 00 jne 0x281
37: 0f b6 1b movzbl (%rbx),%ebx
3a: 31 ff xor %edi,%edi
3c: 89 de mov %ebx,%esi
3e: e8 .byte 0xe8
3f: 54 push %rsp