INFO: task syz-executor.3:3790 blocked for more than 143 seconds.
Not tainted 5.17.0-rc3-syzkaller-00116-gf1baf68e1383 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28080 pid: 3790 ppid: 3638 flags:0x20000004
Call Trace:
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_net_stop_vq drivers/vhost/net.c:1359 [inline]
vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
vhost_net_release+0x9c/0x2d0 drivers/vhost/net.c:1405
__fput+0x286/0x9f0 fs/file_table.c:313
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [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_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6f55549
RSP: 002b:00000000f75e6b20 EFLAGS: 00000286 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 00000000f708d000 RDI: 0000000000000000
RBP: 00000000f70b76c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83c20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3276:
#0: ffff8880232de098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.3/3790:
#0: ffff88804f870218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff88804f870218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-3792/3793:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc3-syzkaller-00116-gf1baf68e1383 #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: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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3793 Comm: vhost-3792 Not tainted 5.17.0-rc3-syzkaller-00116-gf1baf68e1383 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:iotlb_access_ok+0x20d/0x3e0 drivers/vhost/vhost.c:1337
Code: 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 50 01 00 00 4c 8b 63 28 48 89 ee 4c 89 e7 e8 53 80 a4 fa <49> 39 ec 0f 87 18 01 00 00 e8 d5 7c a4 fa 48 8d 7b 48 48 b9 00 00
RSP: 0018:ffffc9000b7d7b30 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888148091d80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88801ffd0000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88804f8701bb
R10: ffffffff86d3fb9d R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f45010df728 CR3: 00000000788bd000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366
handle_rx+0x145/0x1b40 drivers/vhost/net.c:1140
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
----------------
Code disassembly (best guess):
0: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
7: fc ff df
a: 48 89 f8 mov %rdi,%rax
d: 48 c1 e8 03 shr $0x3,%rax
11: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1)
15: 0f 85 50 01 00 00 jne 0x16b
1b: 4c 8b 63 28 mov 0x28(%rbx),%r12
1f: 48 89 ee mov %rbp,%rsi
22: 4c 89 e7 mov %r12,%rdi
25: e8 53 80 a4 fa callq 0xfaa4807d
* 2a: 49 39 ec cmp %rbp,%r12 <-- trapping instruction
2d: 0f 87 18 01 00 00 ja 0x14b
33: e8 d5 7c a4 fa callq 0xfaa47d0d
38: 48 8d 7b 48 lea 0x48(%rbx),%rdi
3c: 48 rex.W
3d: b9 .byte 0xb9