INFO: task syz-executor.1:18924 blocked for more than 143 seconds.
Not tainted 5.17.0-rc6-syzkaller-00242-g0014404f9c18 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27856 pid:18924 ppid: 13923 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0xa94/0x4910 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6436
__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:317
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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3382138c8b
RSP: 002b:00007ffd4c278950 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f3382138c8b
RDX: 00007f338229d988 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f338229a960 R08: 0000000000000000 R09: 00007f338229d990
R10: 00007ffd4c278a50 R11: 0000000000000293 R12: 00000000000c75c3
R13: 00007ffd4c278a50 R14: 00007f3382298f60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb81ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
1 lock held by klogd/2955:
2 locks held by getty/3274:
#0: ffff88807ef25098 (&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:2075
1 lock held by syz-executor.1/18924:
#0: ffff888028680218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888028680218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-18928/18929:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc6-syzkaller-00242-g0014404f9c18 #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+0x1e6/0x230 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: 18929 Comm: vhost-18928 Not tainted 5.17.0-rc6-syzkaller-00242-g0014404f9c18 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vhost_iotlb_itree_iter_first drivers/vhost/iotlb.c:19 [inline]
RIP: 0010:vhost_iotlb_itree_first+0x18/0x280 drivers/vhost/iotlb.c:169
Code: 2e 12 a2 fa 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 57 41 56 41 55 49 89 d5 41 54 55 48 89 fd 53 48 89 f3 e8 08 12 a2 fa <48> 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f
RSP: 0018:ffffc90003f57af8 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000efb1000
RDX: 0000000000040000 RSI: ffffffff86d5d3d8 RDI: ffff88801eaf2b00
RBP: ffff88801eaf2b00 R08: 0000000000000010 R09: ffff8880286801bb
R10: ffffffff86d4e0cb R11: 0000000000000001 R12: 0000000000000000
R13: 000000000000000f R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c012029e00 CR3: 0000000022083000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
iotlb_access_ok+0x1ce/0x3e0 drivers/vhost/vhost.c:1336
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: 2e 12 a2 fa 66 66 2e adc %cs:0x2e6666fa(%rdx),%ah
7: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
e: 00
f: 0f 1f 00 nopl (%rax)
12: 41 57 push %r15
14: 41 56 push %r14
16: 41 55 push %r13
18: 49 89 d5 mov %rdx,%r13
1b: 41 54 push %r12
1d: 55 push %rbp
1e: 48 89 fd mov %rdi,%rbp
21: 53 push %rbx
22: 48 89 f3 mov %rsi,%rbx
25: e8 08 12 a2 fa callq 0xfaa21232
* 2a: 48 89 ea mov %rbp,%rdx <-- trapping instruction
2d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
34: fc ff df
37: 48 c1 ea 03 shr $0x3,%rdx
3b: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
3f: 0f .byte 0xf