INFO: task syz-executor122:7477 can't die for more than 143 seconds.
task:syz-executor122 state:D stack:26648 pid: 7477 ppid: 3667 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5043 [inline]
__schedule+0xa94/0x4910 kernel/sched/core.c:6352
schedule+0xd2/0x1f0 kernel/sched/core.c:6424
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
kthread_stop+0x17a/0x720 kernel/kthread.c:708
ext4_stop_mmpd+0x47/0xd0 fs/ext4/mmp.c:255
__ext4_fill_super fs/ext4/super.c:5518 [inline]
ext4_fill_super+0x9b5e/0xe820 fs/ext4/super.c:5567
get_tree_bdev+0x440/0x760 fs/super.c:1292
vfs_get_tree+0x89/0x2f0 fs/super.c:1497
do_new_mount fs/namespace.c:3025 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3355
do_mount fs/namespace.c:3368 [inline]
__do_sys_mount fs/namespace.c:3576 [inline]
__se_sys_mount fs/namespace.c:3553 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3553
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: 0033:0x7f70492538ea
RSP: 002b:00007ffd19fd0c08 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd19fd0c60 RCX: 00007f70492538ea
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd19fd0c20
RBP: 00007ffd19fd0c20 R08: 00007ffd19fd0c60 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200003f8
R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005
</TASK>
INFO: task syz-executor122:7477 blocked for more than 143 seconds.
Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor122 state:D stack:26648 pid: 7477 ppid: 3667 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5043 [inline]
__schedule+0xa94/0x4910 kernel/sched/core.c:6352
schedule+0xd2/0x1f0 kernel/sched/core.c:6424
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
kthread_stop+0x17a/0x720 kernel/kthread.c:708
ext4_stop_mmpd+0x47/0xd0 fs/ext4/mmp.c:255
__ext4_fill_super fs/ext4/super.c:5518 [inline]
ext4_fill_super+0x9b5e/0xe820 fs/ext4/super.c:5567
get_tree_bdev+0x440/0x760 fs/super.c:1292
vfs_get_tree+0x89/0x2f0 fs/super.c:1497
do_new_mount fs/namespace.c:3025 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3355
do_mount fs/namespace.c:3368 [inline]
__do_sys_mount fs/namespace.c:3576 [inline]
__se_sys_mount fs/namespace.c:3553 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3553
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: 0033:0x7f70492538ea
RSP: 002b:00007ffd19fd0c08 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd19fd0c60 RCX: 00007f70492538ea
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd19fd0c20
RBP: 00007ffd19fd0c20 R08: 00007ffd19fd0c60 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200003f8
R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8bd858e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6498
2 locks held by getty/3276:
#0: ffff888011b99098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002e662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2075
1 lock held by syz-executor122/7477:
#0: ffff88814a61e0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xa80 fs/super.c:228
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__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:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3707 Comm: kworker/u4:1 Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_preemption_disabled+0x4/0x170 lib/smp_processor_id.c:13
Code: 00 00 e8 bf 33 41 f8 65 48 8b 3c 25 00 70 02 00 e8 21 66 f6 f7 eb 99 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc cc cc 41 56 41 55 <49> 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 65 be a4
RSP: 0018:ffffc90003d2f978 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 1ffff920007a5f34 RCX: ffffffff815d6d6e
RDX: 1ffff1100fac6c44 RSI: ffffffff89cc6140 RDI: ffffffff8a26ada0
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff90015987
R10: fffffbfff2002b30 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8bc4c588 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e66787e038 CR3: 000000000ba8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_acquire kernel/locking/lockdep.c:5674 [inline]
lock_acquire+0x1bb/0x510 kernel/locking/lockdep.c:5637
__mutex_lock_common kernel/locking/mutex.c:600 [inline]
__mutex_lock+0x12f/0x12f0 kernel/locking/mutex.c:733
arch_jump_label_transform_apply+0xe/0x20 arch/x86/kernel/jump_label.c:145
jump_label_update+0x32f/0x410 kernel/jump_label.c:830
static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
toggle_allocation_gate mm/kfence/core.c:749 [inline]
toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:727
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.263 msecs
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: e8 bf 33 41 f8 callq 0xf84133c6
7: 65 48 8b 3c 25 00 70 mov %gs:0x27000,%rdi
e: 02 00
10: e8 21 66 f6 f7 callq 0xf7f66636
15: eb 99 jmp 0xffffffb0
17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1c: 0f 0b ud2
1e: e9 23 ff ff ff jmpq 0xffffff46
23: cc int3
24: cc int3
25: cc int3
26: 41 56 push %r14
28: 41 55 push %r13
* 2a: 49 89 f5 mov %rsi,%r13 <-- trapping instruction
2d: 41 54 push %r12
2f: 55 push %rbp
30: 48 89 fd mov %rdi,%rbp
33: 53 push %rbx
34: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
39: 65 gs
3a: 44 rex.R
3b: 8b .byte 0x8b
3c: 25 .byte 0x25
3d: 65 gs
3e: be .byte 0xbe
3f: a4 movsb %ds:(%rsi),%es:(%rdi)