INFO: task syz.2.867:10316 blocked for more than 143 seconds.
Not tainted 6.11.0-rc3-next-20240815-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.867 state:D stack:23760 pid:10316 tgid:10316 ppid:7085 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5270 [inline]
__schedule+0x17ff/0x4ad0 kernel/sched/core.c:6639
__schedule_loop kernel/sched/core.c:6716 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6731
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
__vhost_worker_flush+0x1e6/0x280 drivers/vhost/vhost.c:288
vhost_worker_flush drivers/vhost/vhost.c:295 [inline]
vhost_dev_flush+0xc9/0x150 drivers/vhost/vhost.c:305
vhost_net_flush+0x24/0x160 drivers/vhost/net.c:1359
vhost_net_release+0x10c/0x470 drivers/vhost/net.c:1380
__fput+0x24b/0x890 fs/file_table.c:424
task_work_run+0x24f/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf5d1799b9
RSP: 002b:00007fff0ab22548 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fcf5d317a80 RCX: 00007fcf5d1799b9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fcf5d317a80 R08: 0000000000000006 R09: 00007fff0ab2282f
R10: 00000000003ffb54 R11: 0000000000000246 R12: 000000000007bd76
R13: 00007fff0ab22640 R14: 00007fff0ab22660 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e939720 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e939720 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e939720 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6645
3 locks held by kworker/u8:6/2915:
2 locks held by getty/4981:
#0: ffff88802b6da0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by udevd/5769:
1 lock held by udevd/5808:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc3-next-20240815-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 2915 Comm: kworker/u8:6 Not tainted 6.11.0-rc3-next-20240815-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4791 [inline]
RIP: 0010:__lock_acquire+0x749/0x2040 kernel/locking/lockdep.c:5095
Code: 41 89 ec ff cd 0f 88 a2 00 00 00 89 eb 83 fd 31 73 79 48 8d 04 9b 48 8d 5c c6 20 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 75 18 <8b> 1b 41 0f b6 04 16 84 c0 75 31 41 33 1f f7 c3 00 60 00 00 74 c0
RSP: 0018:ffffc900098e7830 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88802c256550 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: ffff88802c2564e0 RDI: 0000000000000014
RBP: 0000000000000002 R08: ffffffff9375c877 R09: 1ffffffff26eb90e
R10: dffffc0000000000 R11: fffffbfff26eb90f R12: 0000000000000003
R13: ffff88802c2564d8 R14: 1ffff1100584acb4 R15: ffff88802c2565a0
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78f1ae8178 CR3: 000000000e736000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5762
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
kcov_remote_start+0x10d/0x7d0 kernel/kcov.c:886
kcov_remote_start_common include/linux/kcov.h:50 [inline]
ieee80211_iface_work+0x21f/0xf20 net/mac80211/iface.c:1637
cfg80211_wiphy_work+0x2db/0x490 net/wireless/core.c:440
process_one_work kernel/workqueue.c:3232 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3313
worker_thread+0x86d/0xd10 kernel/workqueue.c:3390
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244