INFO: task syz-executor105:3645 blocked for more than 143 seconds.
Not tainted 5.17.0-rc5-syzkaller-00011-g5c1ee569660d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor105 state:D stack:24752 pid: 3645 ppid: 3623 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x926/0x1080 kernel/sched/core.c:6304
schedule+0x12b/0x1f0 kernel/sched/core.c:6377
schedule_timeout+0xac/0x300 kernel/time/timer.c:1857
do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
kthread_stop+0xf8/0x200 kernel/kthread.c:709
ext4_stop_mmpd+0x43/0xb0 fs/ext4/mmp.c:255
__ext4_fill_super+0x9b13/0xf6f0 fs/ext4/super.c:5505
ext4_fill_super+0x30d/0x6f0 fs/ext4/super.c:5554
get_tree_bdev+0x406/0x630 fs/super.c:1292
vfs_get_tree+0x86/0x270 fs/super.c:1497
do_new_mount fs/namespace.c:3024 [inline]
path_mount+0x1986/0x2c30 fs/namespace.c:3354
do_mount fs/namespace.c:3367 [inline]
__do_sys_mount fs/namespace.c:3575 [inline]
__se_sys_mount+0x308/0x3c0 fs/namespace.c:3552
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f08c9d7ecca
RSP: 002b:00007fff28ebf458 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fff28ebf4b0 RCX: 00007f08c9d7ecca
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fff28ebf470
RBP: 00007fff28ebf470 R08: 00007fff28ebf4b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200003f8
R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8cb1d460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3273:
#0: ffff88814ad39098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b732e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2075
1 lock held by syz-executor105/3645:
#0: ffff88807e7c00e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x1c8/0x820 fs/super.c:228
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc5-syzkaller-00011-g5c1ee569660d #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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:369
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.17.0-rc5-syzkaller-00011-g5c1ee569660d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4715 [inline]
RIP: 0010:__lock_acquire+0x69b/0x2b00 kernel/locking/lockdep.c:4977
Code: 44 c8 89 4c 24 54 48 8b 44 24 48 8a 04 30 84 c0 0f 85 a6 1b 00 00 41 8b 1f 66 0f 1f 44 00 00 41 89 dd ff cb 0f 88 bd 00 00 00 <41> 89 de 83 fb 31 0f 83 8e 00 00 00 4b 8d 04 b6 4c 8d b4 c7 80 0a
RSP: 0018:ffffc90000cd7500 EFLAGS: 00000046
RAX: ffff88801163e1f8 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff88801163d700
RBP: ffffc90000cd7650 R08: dffffc0000000000 R09: fffffbfff1ffb7c5
R10: fffffbfff1ffb7c5 R11: 0000000000000000 R12: 000000000000000f
R13: 0000000000000001 R14: 00000000000800b0 R15: ffff88801163e158
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffea2c45028 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5639
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
debug_object_activate+0x97/0x6a0 lib/debugobjects.c:661
debug_timer_activate kernel/time/timer.c:729 [inline]
__mod_timer+0x824/0xd20 kernel/time/timer.c:1050
queue_delayed_work_on+0x135/0x230 kernel/workqueue.c:1718
queue_delayed_work include/linux/workqueue.h:517 [inline]
toggle_allocation_gate+0x40f/0x460 mm/kfence/core.c:751
process_one_work+0x86c/0x1190 kernel/workqueue.c:2307
worker_thread+0xab1/0x1300 kernel/workqueue.c:2454
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 44 c8 89 4c 24 rex.R enterq $0x4c89,$0x24
5: 54 push %rsp
6: 48 8b 44 24 48 mov 0x48(%rsp),%rax
b: 8a 04 30 mov (%rax,%rsi,1),%al
e: 84 c0 test %al,%al
10: 0f 85 a6 1b 00 00 jne 0x1bbc
16: 41 8b 1f mov (%r15),%ebx
19: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
1f: 41 89 dd mov %ebx,%r13d
22: ff cb dec %ebx
24: 0f 88 bd 00 00 00 js 0xe7
* 2a: 41 89 de mov %ebx,%r14d <-- trapping instruction
2d: 83 fb 31 cmp $0x31,%ebx
30: 0f 83 8e 00 00 00 jae 0xc4
36: 4b 8d 04 b6 lea (%r14,%r14,4),%rax
3a: 4c rex.WR
3b: 8d .byte 0x8d
3c: b4 c7 mov $0xc7,%ah
3e: 80 .byte 0x80
3f: 0a .byte 0xa