================================
WARNING: inconsistent lock state
5.16.0-rc2-syzkaller #0 Not tainted
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
syz-executor.0/25135 [HC1[1]:SC0[0]:HE0:SE1] takes:
ffff888071bd2418 (&ctx->timeout_lock){?.+.}-{2:2}, at: io_timeout_fn+0x6f/0x360 fs/io_uring.c:5943
{HARDIRQ-ON-W} state was registered at:
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4224 [inline]
lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4292 [inline]
lockdep_hardirqs_on_prepare+0x135/0x400 kernel/locking/lockdep.c:4244
trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
_raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:399 [inline]
__io_poll_remove_one fs/io_uring.c:5669 [inline]
__io_poll_remove_one fs/io_uring.c:5654 [inline]
io_poll_remove_one+0x236/0x870 fs/io_uring.c:5680
io_poll_remove_all+0x1af/0x235 fs/io_uring.c:5709
io_ring_ctx_wait_and_kill+0x1cc/0x322 fs/io_uring.c:9534
io_uring_release+0x42/0x46 fs/io_uring.c:9554
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xc14/0x2b40 kernel/exit.c:832
do_group_exit+0x125/0x310 kernel/exit.c:929
__do_sys_exit_group kernel/exit.c:940 [inline]
__se_sys_exit_group kernel/exit.c:938 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:938
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
irq event stamp: 13302
hardirqs last enabled at (13301): [<ffffffff8946deff>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (13301): [<ffffffff8946deff>] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202
hardirqs last disabled at (13302): [<ffffffff8943f67b>] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1097
softirqs last enabled at (13142): [<ffffffff8146a9b3>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last enabled at (13142): [<ffffffff8146a9b3>] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
softirqs last disabled at (13131): [<ffffffff8146a9b3>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last disabled at (13131): [<ffffffff8146a9b3>] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&ctx->timeout_lock);
<Interrupt>
lock(&ctx->timeout_lock);
*** DEADLOCK ***
1 lock held by syz-executor.0/25135:
#0: ffffffff8bb83ca0 (rcu_read_lock){....}-{1:2}, at: percpu_ref_put_many+0x0/0x260 arch/x86/include/asm/bitops.h:207
stack backtrace:
CPU: 0 PID: 25135 Comm: syz-executor.0 Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_usage_bug kernel/locking/lockdep.c:203 [inline]
valid_state kernel/locking/lockdep.c:3945 [inline]
mark_lock_irq kernel/locking/lockdep.c:4148 [inline]
mark_lock.cold+0x61/0x8e kernel/locking/lockdep.c:4605
mark_usage kernel/locking/lockdep.c:4497 [inline]
__lock_acquire+0x149d/0x54a0 kernel/locking/lockdep.c:4981
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
io_timeout_fn+0x6f/0x360 fs/io_uring.c:5943
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__rcu_read_unlock+0x7/0x570 kernel/rcu/tree_plugin.h:416
Code: 00 48 8b 44 24 08 4c 8b 04 24 e9 c8 fd ff ff e8 3f 50 5a 00 e9 8a fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 <65> 48 8b 2c 25 40 70 02 00 53 48 8d bd 3c 04 00 00 48 b8 00 00 00
RSP: 0018:ffffc90016a8fdb0 EFLAGS: 00000216
RAX: 00000000000168e5 RBX: 0000607f46067fe8 RCX: ffffc90002ce1000
RDX: 0000000000040000 RSI: ffffffff81e0cbe1 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff81e0cbd7 R11: 0000000000000000 R12: ffffffffffffffff
R13: 0000000000000000 R14: 0000000000000001 R15: ffff88808e6d5a00
rcu_read_unlock include/linux/rcupdate.h:720 [inline]
percpu_ref_put_many+0x156/0x260 include/linux/percpu-refcount.h:337
percpu_ref_put include/linux/percpu-refcount.h:351 [inline]
ctx_flush_and_put fs/io_uring.c:2169 [inline]
tctx_task_work+0x4fd/0x630 fs/io_uring.c:2213
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_signal include/linux/tracehook.h:214 [inline]
handle_signal_work kernel/entry/common.c:146 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x256/0x290 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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f26f1c81ae9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f26ef1f7188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 000000000000014a RBX: 00007f26f1d94f60 RCX: 00007f26f1c81ae9
RDX: 0000000000000000 RSI: 000000000000014a RDI: 0000000000000003
RBP: 00007f26f1cdbf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26f22c8b2f R14: 00007f26ef1f7300 R15: 0000000000022000
</TASK>
----------------
Code disassembly (best guess):
0: 00 48 8b add %cl,-0x75(%rax)
3: 44 24 08 rex.R and $0x8,%al
6: 4c 8b 04 24 mov (%rsp),%r8
a: e9 c8 fd ff ff jmpq 0xfffffdd7
f: e8 3f 50 5a 00 callq 0x5a5053
14: e9 8a fd ff ff jmpq 0xfffffda3
19: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
20: 00 00 00
23: 41 56 push %r14
25: 41 55 push %r13
27: 41 54 push %r12
29: 55 push %rbp
* 2a: 65 48 8b 2c 25 40 70 mov %gs:0x27040,%rbp <-- trapping instruction
31: 02 00
33: 53 push %rbx
34: 48 8d bd 3c 04 00 00 lea 0x43c(%rbp),%rdi
3b: 48 rex.W
3c: b8 .byte 0xb8
3d: 00 00 add %al,(%rax)