INFO: task syz-executor.0:10030 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28784 pid:10030 ppid: 6490 flags:0x20024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9850
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x21d0 kernel/signal.c:2820
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
__do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6ee1549
RSP: 002b:00000000f44ba67c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 00000000f703e024 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f703e028
RBP: 0000000000000081 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2932 Comm: systemd-journal Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_is_held_type+0xeb/0x140 kernel/locking/lockdep.c:5670
Code: 45 31 ed 44 39 f0 41 0f 94 c5 48 c7 c7 60 0b 8c 89 e8 a9 0d 00 00 b8 ff ff ff ff 65 0f c1 05 dc 94 c9 76 83 f8 01 75 29 9c 58 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 44 89
RSP: 0018:ffffc90002a0fa80 EFLAGS: 00000046
RAX: 0000000000000046 RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffffff8b9838a0 R08: 0000000000000000 R09: ffffffff8d6f7017
R10: fffffbfff1adee02 R11: 0000000000000000 R12: ffff88807b743a00
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88807b744488
FS: 00007f3cccdf68c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3cca219020 CR3: 000000007f9b0000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5636
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x16/0x70 kernel/locking/spinlock.c:194
__debug_check_no_obj_freed lib/debugobjects.c:1002 [inline]
debug_check_no_obj_freed+0x20c/0x420 lib/debugobjects.c:1023
free_pages_prepare mm/page_alloc.c:1345 [inline]
free_pcp_prepare+0x2ae/0x810 mm/page_alloc.c:1391
free_unref_page_prepare mm/page_alloc.c:3317 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3396
__unfreeze_partials+0x340/0x360 mm/slub.c:2502
qlink_free mm/kasan/quarantine.c:146 [inline]
qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
__kasan_slab_alloc+0x95/0xb0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:259 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slub.c:3213 [inline]
slab_alloc mm/slub.c:3221 [inline]
kmem_cache_alloc+0x209/0x390 mm/slub.c:3226
prepare_creds+0x3f/0x7b0 kernel/cred.c:260
access_override_creds fs/open.c:351 [inline]
do_faccessat+0x3f4/0x850 fs/open.c:415
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3ccc0b19c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffdb30d2928 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffdb30d5840 RCX: 00007f3ccc0b19c7
RDX: 00007f3cccb22a00 RSI: 0000000000000000 RDI: 00005639831809a3
RBP: 00007ffdb30d2960 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffdb30d5840 R15: 00007ffdb30d2e50
----------------
Code disassembly (best guess):
0: 45 31 ed xor %r13d,%r13d
3: 44 39 f0 cmp %r14d,%eax
6: 41 0f 94 c5 sete %r13b
a: 48 c7 c7 60 0b 8c 89 mov $0xffffffff898c0b60,%rdi
11: e8 a9 0d 00 00 callq 0xdbf
16: b8 ff ff ff ff mov $0xffffffff,%eax
1b: 65 0f c1 05 dc 94 c9 xadd %eax,%gs:0x76c994dc(%rip) # 0x76c994ff
22: 76
23: 83 f8 01 cmp $0x1,%eax
26: 75 29 jne 0x51
28: 9c pushfq
29: 58 pop %rax
* 2a: f6 c4 02 test $0x2,%ah <-- trapping instruction
2d: 75 3d jne 0x6c
2f: 48 f7 04 24 00 02 00 testq $0x200,(%rsp)
36: 00
37: 74 01 je 0x3a
39: fb sti
3a: 48 83 c4 08 add $0x8,%rsp
3e: 44 rex.R
3f: 89 .byte 0x89