INFO: task syz-executor.1:2355 blocked for more than 143 seconds.
Not tainted 5.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29576 pid: 2355 ppid: 6546 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
io_ring_ctx_wait_and_kill+0x72/0x322 fs/io_uring.c:9565
io_uring_release+0x42/0x46 fs/io_uring.c:9594
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/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: 0033:0x7f3540a32b32
RSP: 002b:00007f353df870f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: 0000000020003000 RBX: 0000000000008011 RCX: 00007f3540a32b32
RDX: 0000000000000003 RSI: 0000000000100000 RDI: 0000000020003000
RBP: 0000000020003000 R08: 0000000000000003 R09: 0000000010000000
R10: 0000000000008011 R11: 0000000000000206 R12: 0000000020000140
R13: 0000000020003000 R14: 0000000020000100 R15: 0000000020002000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb80fe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6220:
#0: ffff8880763055f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by agetty/6459:
#0: ffff88801cbc7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b142e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.1/2327:
1 lock held by syz-executor.1/2355:
#0: ffff88806c37f0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_ctx_wait_and_kill+0x72/0x322 fs/io_uring.c:9565
4 locks held by syz-executor.1/2357:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc3-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:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2971 Comm: systemd-journal Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:_prb_read_valid+0x2/0x710 kernel/printk/printk_ringbuffer.c:1876
Code: fd ff ff 4c 89 ff e8 7d b1 5e 00 e9 83 fe ff ff e8 73 b1 5e 00 e9 d3 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 57 <49> 89 ff 41 56 49 89 f6 41 55 41 54 55 53 48 bb 00 00 00 00 00 fc
RSP: 0018:ffffc9000bbefa88 EFLAGS: 00000293
RAX: 0000000000000000 RBX: fffff5200177df53 RCX: 0000000000000000
RDX: ffffc9000bbefad8 RSI: ffffc9000bbefab8 RDI: ffffffff8ba901a0
RBP: ffffffff8ba901a0 R08: 0000000000000000 R09: ffff888075dc0007
R10: ffffed100ebb8000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc9000bbefb80 R14: 0000000000000000 R15: 0000000000000001
FS: 00007f0d9d9918c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0d9aed1000 CR3: 0000000076331000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
prb_read_valid_info+0xa7/0xe0 kernel/printk/printk_ringbuffer.c:1963
devkmsg_poll+0x128/0x220 kernel/printk/printk.c:823
vfs_poll include/linux/poll.h:90 [inline]
ep_item_poll+0xf4/0x190 fs/eventpoll.c:846
ep_send_events fs/eventpoll.c:1685 [inline]
ep_poll fs/eventpoll.c:1799 [inline]
do_epoll_wait+0x734/0x1940 fs/eventpoll.c:2227
__do_sys_epoll_wait fs/eventpoll.c:2239 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2234 [inline]
__x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2234
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: 0033:0x7f0d9cc5a2e3
Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 29 54 2b 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24
RSP: 002b:00007ffc414f5cc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000557b71396200 RCX: 00007f0d9cc5a2e3
RDX: 0000000000000013 RSI: 00007ffc414f5cd0 RDI: 0000000000000008
RBP: 00007ffc414f5ec0 R08: 0000000061a8a66a R09: 00007ffc41511080
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc414f5cd0
R13: 0000000000000001 R14: ffffffffffffffff R15: 0005d227a54f3b7e
----------------
Code disassembly (best guess), 2 bytes skipped:
0: ff 4c 89 ff decl -0x1(%rcx,%rcx,4)
4: e8 7d b1 5e 00 callq 0x5eb186
9: e9 83 fe ff ff jmpq 0xfffffe91
e: e8 73 b1 5e 00 callq 0x5eb186
13: e9 d3 fe ff ff jmpq 0xfffffeeb
18: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
1f: 00 00 00 00
23: 0f 1f 00 nopl (%rax)
26: 41 57 push %r15
* 28: 49 89 ff mov %rdi,%r15 <-- trapping instruction
2b: 41 56 push %r14
2d: 49 89 f6 mov %rsi,%r14
30: 41 55 push %r13
32: 41 54 push %r12
34: 55 push %rbp
35: 53 push %rbx
36: 48 rex.W
37: bb 00 00 00 00 mov $0x0,%ebx
3c: 00 fc add %bh,%ah