INFO: task syz-executor.4:9047 blocked for more than 143 seconds.
Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26864 pid: 9047 ppid: 3645 flags:0x00004004
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_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
vhost_net_release+0x100/0x4d0 drivers/vhost/net.c:1405
__fput+0x3fc/0x870 fs/file_table.c:280
task_work_run+0x146/0x1c0 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+0x209/0x220 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: 0033:0x7f7217294adb
RSP: 002b:00007fff048e30b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f7217294adb
RDX: 00007f72173fac98 RSI: ffffffffffffffff RDI: 0000000000000004
RBP: 00007f72173f6960 R08: 0000000000000000 R09: 00007f72173faca0
R10: 00007fff048e31b0 R11: 0000000000000293 R12: 000000000004c6d3
R13: 00007fff048e31b0 R14: 00007f72173f4f60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1de00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3288:
#0: ffff888023c8d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.4/9047:
#0: ffff888080830218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888080830218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
1 lock held by vhost-9048/9050:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc7-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: 2961 Comm: klogd Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_pc+0x59/0x60 kernel/kcov.c:210
Code: 80 15 00 00 83 fa 02 75 21 48 8b 91 88 15 00 00 48 8b 32 48 8d 7e 01 8b 89 84 15 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a 66 0f 1f 44 00 00 4c 8b 04 24 65 48 8b 14 25 c0 6f 02 00 65 8b
RSP: 0018:ffffc9000b8c7678 EFLAGS: 00000293
RAX: ffffffff8445aa41 RBX: 0000000000000000 RCX: ffff88807d478000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000b8c7770 R08: ffffffff8445a831 R09: ffffffff8445a7d7
R10: 0000000000000002 R11: ffff88807d478000 R12: ffff0a00ffffff0f
R13: dffffc0000000000 R14: ffffffff8a700484 R15: dffffc0000000000
FS: 00007fba89dc7800(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555ff3f4f600 CR3: 000000007ec14000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
format_decode+0x441/0x1ab0 lib/vsprintf.c:2546
vsnprintf+0x15b/0x1d60 lib/vsprintf.c:2757
sprintf+0xd6/0x120 lib/vsprintf.c:3007
print_syslog kernel/printk/printk.c:1254 [inline]
info_print_prefix+0xda/0x300 kernel/printk/printk.c:1284
record_print_text+0x15a/0x410 kernel/printk/printk.c:1336
syslog_print kernel/printk/printk.c:1536 [inline]
do_syslog+0xf2e/0x12e0 kernel/printk/printk.c:1655
__do_sys_syslog kernel/printk/printk.c:1747 [inline]
__se_sys_syslog kernel/printk/printk.c:1745 [inline]
__x64_sys_syslog+0x78/0x90 kernel/printk/printk.c:1745
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: 0033:0x7fba89f628b7
Code: 73 01 c3 48 8b 0d c1 05 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 05 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007fff0ddb2408 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007fba8a0ef490 RCX: 00007fba89f628b7
RDX: 00000000000003ff RSI: 00007fba8a0ef490 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000007 R09: 00005567ac1c9740
R10: 0000000000004000 R11: 0000000000000206 R12: 00007fba8a0ef490
R13: 00007fba8a0ef4f3 R14: 00007fba8a0ef4f3 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 80 15 00 00 83 fa 02 adcb $0x2,-0x57d0000(%rip) # 0xfa830007
7: 75 21 jne 0x2a
9: 48 8b 91 88 15 00 00 mov 0x1588(%rcx),%rdx
10: 48 8b 32 mov (%rdx),%rsi
13: 48 8d 7e 01 lea 0x1(%rsi),%rdi
17: 8b 89 84 15 00 00 mov 0x1584(%rcx),%ecx
1d: 48 39 cf cmp %rcx,%rdi
20: 73 08 jae 0x2a
22: 48 89 44 f2 08 mov %rax,0x8(%rdx,%rsi,8)
27: 48 89 3a mov %rdi,(%rdx)
* 2a: c3 retq <-- trapping instruction
2b: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
31: 4c 8b 04 24 mov (%rsp),%r8
35: 65 48 8b 14 25 c0 6f mov %gs:0x26fc0,%rdx
3c: 02 00
3e: 65 gs
3f: 8b .byte 0x8b