INFO: task syz-executor.5:4186 blocked for more than 143 seconds.
Not tainted 5.17.0-rc3-syzkaller-00029-ge6251ab4551f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29096 pid: 4186 ppid: 3628 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4db0 kernel/sched/core.c:6295
schedule+0xd2/0x260 kernel/sched/core.c:6368
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
vhost_vsock_dev_ioctl+0x377/0xbc0 drivers/vhost/vsock.c:894
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7fefd15ad059
RSP: 002b:00007fefcff22168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fefd16bff60 RCX: 00007fefd15ad059
RDX: 0000000020000780 RSI: 000000004028af11 RDI: 0000000000000031
RBP: 00007fefd160708d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd009d891f R14: 00007fefcff22300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.5:4187 blocked for more than 143 seconds.
Not tainted 5.17.0-rc3-syzkaller-00029-ge6251ab4551f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29080 pid: 4187 ppid: 3628 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4db0 kernel/sched/core.c:6295
schedule+0xd2/0x260 kernel/sched/core.c:6368
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
vhost_vsock_start drivers/vhost/vsock.c:582 [inline]
vhost_vsock_dev_ioctl+0x24b/0xbc0 drivers/vhost/vsock.c:869
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7fefd15ad059
RSP: 002b:00007fefcff01168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fefd16c0030 RCX: 00007fefd15ad059
RDX: 0000000020000000 RSI: 000000004004af61 RDI: 0000000000000031
RBP: 00007fefd160708d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd009d891f R14: 00007fefcff01300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.5:4188 blocked for more than 144 seconds.
Not tainted 5.17.0-rc3-syzkaller-00029-ge6251ab4551f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29048 pid: 4188 ppid: 3628 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4db0 kernel/sched/core.c:6295
schedule+0xd2/0x260 kernel/sched/core.c:6368
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
vhost_work_dev_flush.part.0+0xbb/0xf0 drivers/vhost/vhost.c:243
vhost_work_dev_flush drivers/vhost/vhost.c:238 [inline]
vhost_poll_flush+0x5e/0x80 drivers/vhost/vhost.c:252
vhost_vsock_flush drivers/vhost/vsock.c:710 [inline]
vhost_vsock_dev_ioctl+0x3e9/0xbc0 drivers/vhost/vsock.c:899
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7fefd15ad059
RSP: 002b:00007fefcfee0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fefd16c0100 RCX: 00007fefd15ad059
RDX: 0000000000000000 RSI: 000000000000af01 RDI: 0000000000000031
RBP: 00007fefd160708d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd009d891f R14: 00007fefcfee0300 R15: 0000000000022000
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb81120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3281:
#0: ffff88802549e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b5e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.5/4186:
#0: ffff88802e220070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_dev_ioctl+0x377/0xbc0 drivers/vhost/vsock.c:894
1 lock held by syz-executor.5/4187:
#0: ffff88802e220070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_start drivers/vhost/vsock.c:582 [inline]
#0: ffff88802e220070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_dev_ioctl+0x24b/0xbc0 drivers/vhost/vsock.c:869
1 lock held by syz-executor.5/4188:
#0: ffff88802e220070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_dev_ioctl+0x377/0xbc0 drivers/vhost/vsock.c:894
1 lock held by vhost-4188/4189:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc3-syzkaller-00029-ge6251ab4551f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__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:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4189 Comm: vhost-4188 Not tainted 5.17.0-rc3-syzkaller-00029-ge6251ab4551f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_kcov_mode+0x2c/0x40 kernel/kcov.c:177
Code: 05 29 c6 8a 7e 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 a4 15 00 00 85 d2 74 0b 8b 86 80 15 00 00 <39> f8 0f 94 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0
RSP: 0018:ffffc9001065fc38 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffffffffffff
RDX: 0000000000000000 RSI: ffff888026788140 RDI: 0000000000000003
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffc9001065fc77
R10: ffffffff86d4cd0d R11: 0000000000000001 R12: ffff888072db2300
R13: 000000000000000f R14: ffffffffffffffff R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f93c5e54600 CR3: 000000007581e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
write_comp_data kernel/kcov.c:221 [inline]
__sanitizer_cov_trace_cmp8+0x1d/0x70 kernel/kcov.c:267
vhost_iotlb_itree_subtree_search drivers/vhost/iotlb.c:19 [inline]
vhost_iotlb_itree_iter_first drivers/vhost/iotlb.c:19 [inline]
vhost_iotlb_itree_first+0x19d/0x280 drivers/vhost/iotlb.c:169
iotlb_access_ok+0x1ce/0x3e0 drivers/vhost/vhost.c:1336
vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366
vhost_transport_do_send_pkt+0xe0/0xfd0 drivers/vhost/vsock.c:104
vhost_worker+0x23d/0x3d0 drivers/vhost/vhost.c:372
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
----------------
Code disassembly (best guess):
0: 05 29 c6 8a 7e add $0x7e8ac629,%eax
5: 89 c2 mov %eax,%edx
7: 81 e2 00 01 00 00 and $0x100,%edx
d: a9 00 01 ff 00 test $0xff0100,%eax
12: 74 10 je 0x24
14: 31 c0 xor %eax,%eax
16: 85 d2 test %edx,%edx
18: 74 15 je 0x2f
1a: 8b 96 a4 15 00 00 mov 0x15a4(%rsi),%edx
20: 85 d2 test %edx,%edx
22: 74 0b je 0x2f
24: 8b 86 80 15 00 00 mov 0x1580(%rsi),%eax
* 2a: 39 f8 cmp %edi,%eax <-- trapping instruction
2c: 0f 94 c0 sete %al
2f: c3 retq
30: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
37: 00 00 00 00
3b: 0f 1f 00 nopl (%rax)
3e: 31 c0 xor %eax,%eax