INFO: task syz-executor.1:4248 blocked for more than 143 seconds.
Not tainted 5.16.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27904 pid: 4248 ppid: 4240 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x19d/0x250 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
kthread_stop+0x104/0x4f0 kernel/kthread.c:648
ext4_stop_mmpd+0x34/0xb0 fs/ext4/mmp.c:255
ext4_fill_super+0x7b61/0xb6a0 fs/ext4/super.c:5068
mount_bdev+0x2cb/0x3b0 fs/super.c:1370
legacy_get_tree+0xfa/0x1f0 fs/fs_context.c:610
vfs_get_tree+0x7f/0x2c0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x7e8/0x1a40 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516
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: 0033:0x467afa
RSP: 002b:00007f063e717fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007f063e718000
RBP: 00007f063e718040 R08: 00007f063e718040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000
R13: 00000000200000c0 R14: 00007f063e718000 R15: 0000000020000200
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8ab78bc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by getty/3314:
#0: ffff88814b058098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900027a32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9dd/0xed0 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.1/4248:
#0: ffff8880784ce0e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa10 fs/super.c:229
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc5-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+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x11f/0x170 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+0x88c/0xbf0 kernel/hung_task.c:295
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 133 Comm: kworker/1:2 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:202 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:513 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:82 [inline]
RIP: 0010:do_raw_spin_lock+0x132/0x2b0 kernel/locking/spinlock_debug.c:115
Code: 00 00 00 00 e8 cf 24 54 00 be 04 00 00 00 48 8d 7c 24 28 e8 c0 24 54 00 8b 44 24 28 ba 01 00 00 00 89 44 24 04 f0 0f b1 55 00 <0f> 85 91 00 00 00 65 44 8b 35 08 11 ae 7e 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc9000238fc48 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92000471f8a RCX: ffffffff81540460
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000238fc70
RBP: ffffffff8b7e8840 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000471f8e R11: 000000000007a08a R12: ffffffff8b7e8848
R13: ffffffff8b7e8850 R14: dffffc0000000000 R15: ffff888070482bf8
FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556edfba5680 CR3: 0000000020aee000 CR4: 0000000000350ee0
Call Trace:
spin_lock include/linux/spinlock.h:349 [inline]
wg_ratelimiter_gc_entries+0x4a/0x370 drivers/net/wireguard/ratelimiter.c:63
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: e8 cf 24 54 00 callq 0x5424d8
9: be 04 00 00 00 mov $0x4,%esi
e: 48 8d 7c 24 28 lea 0x28(%rsp),%rdi
13: e8 c0 24 54 00 callq 0x5424d8
18: 8b 44 24 28 mov 0x28(%rsp),%eax
1c: ba 01 00 00 00 mov $0x1,%edx
21: 89 44 24 04 mov %eax,0x4(%rsp)
25: f0 0f b1 55 00 lock cmpxchg %edx,0x0(%rbp)
* 2a: 0f 85 91 00 00 00 jne 0xc1 <-- trapping instruction
30: 65 44 8b 35 08 11 ae mov %gs:0x7eae1108(%rip),%r14d # 0x7eae1140
37: 7e
38: 48 rex.W
39: b8 00 00 00 00 mov $0x0,%eax
3e: 00 fc add %bh,%ah