INFO: task syz-executor.0:12774 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.0 state:D stack:22224 pid:12774 ppid: 6532 flags:0x00024006
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
schedule_timeout+0xac/0x300 kernel/time/timer.c:1857
do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
io_wq_exit_workers fs/io-wq.c:1217 [inline]
io_wq_put_and_exit+0x5cf/0xc50 fs/io-wq.c:1252
io_uring_clean_tctx+0x103/0x1d5 fs/io_uring.c:9801
io_uring_cancel_generic+0x624/0x661 fs/io_uring.c:9882
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x281/0x24f0 kernel/exit.c:787
do_group_exit+0x168/0x2d0 kernel/exit.c:929
get_signal+0x1740/0x2120 kernel/signal.c:2852
arch_do_signal_or_restart+0x9c/0x730 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+0x191/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbbadaafae9
RSP: 002b:00007fbbab025188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000200 RBX: 00007fbbadbc2f60 RCX: 00007fbbadaafae9
RDX: 0000000008000000 RSI: 00000000000045f5 RDI: 0000000000000003
RBP: 00007fbbadb09f6d R08: 0000000000000000 R09: 0000000000001800
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffffbe569f R14: 00007fbbab025300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1dd40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by in:imklog/6196:
#0: ffff888078f5dc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
=============================================
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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2962 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:check_kcov_mode kernel/kcov.c:177 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:221 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x31/0xa0 kernel/kcov.c:287
Code: 14 25 c0 6f 02 00 65 8b 05 74 f3 7d 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 6e 83 ba a4 15 00 00 00 74 65 8b 82 80 15 00 00 <83> f8 03 75 5a 48 8b 8a 88 15 00 00 44 8b 8a 84 15 00 00 49 c1 e1
RSP: 0018:ffffc90001a7f7b8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff88807b5dd700
RDX: ffff88807b5dd700 RSI: 00000000fffffff8 RDI: 00000000ffffffff
RBP: ffffc90001a7f8f0 R08: ffffffff844cffca R09: ffffc90001a7f860
R10: fffff5200034ff0f R11: 0000000000000000 R12: ffff88807a9600fd
R13: ffff88807a9600fe R14: 00000000fffffff9 R15: ffff88807a9620f8
FS: 00007fec6f2318c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fec6c668000 CR3: 000000007b318000 CR4: 00000000003506f0
Call Trace:
number+0xd1a/0x1040 lib/vsprintf.c:560
vsnprintf+0x1328/0x1d60 lib/vsprintf.c:2871
vscnprintf lib/vsprintf.c:2908 [inline]
scnprintf+0xd3/0x170 lib/vsprintf.c:2962
info_print_ext_header kernel/printk/printk.c:567 [inline]
devkmsg_read+0x37f/0x900 kernel/printk/printk.c:749
vfs_read+0x324/0xe60 fs/read_write.c:479
ksys_read+0x18f/0x2c0 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fec6e7c0210
Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24
RSP: 002b:00007ffd234e88f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007ffd234eb370 RCX: 00007fec6e7c0210
RDX: 0000000000002000 RSI: 00007ffd234e9170 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000008 R09: 000055bc4f78e7b8
R10: 000055bc4f78e780 R11: 0000000000000246 R12: 00007ffd234e9170
R13: 00007ffd234eb2c8 R14: 000055bc4d90b958 R15: 0005d1f826a0b7ad
----------------
Code disassembly (best guess):
0: 14 25 adc $0x25,%al
2: c0 6f 02 00 shrb $0x0,0x2(%rdi)
6: 65 8b 05 74 f3 7d 7e mov %gs:0x7e7df374(%rip),%eax # 0x7e7df381
d: a9 00 01 ff 00 test $0xff0100,%eax
12: 74 10 je 0x24
14: a9 00 01 00 00 test $0x100,%eax
19: 74 6e je 0x89
1b: 83 ba a4 15 00 00 00 cmpl $0x0,0x15a4(%rdx)
22: 74 65 je 0x89
24: 8b 82 80 15 00 00 mov 0x1580(%rdx),%eax
* 2a: 83 f8 03 cmp $0x3,%eax <-- trapping instruction
2d: 75 5a jne 0x89
2f: 48 8b 8a 88 15 00 00 mov 0x1588(%rdx),%rcx
36: 44 8b 8a 84 15 00 00 mov 0x1584(%rdx),%r9d
3d: 49 rex.WB
3e: c1 .byte 0xc1
3f: e1 .byte 0xe1