INFO: task syz-executor.0:11814 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28104 pid:11814 ppid: 6549 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
del_gendisk+0x598/0x860 block/genhd.c:623
loop_remove+0x39/0xf0 drivers/block/loop.c:2080
loop_control_remove drivers/block/loop.c:2137 [inline]
loop_control_ioctl+0x445/0x4a0 drivers/block/loop.c:2175
__do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:972
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6eeb549
RSP: 002b:00000000f44c45fc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000004c81
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-journal/2952:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
1 lock held by in:imklog/6223:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 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: 2952 Comm: systemd-journal Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mark_lock+0x65/0x17b0 kernel/locking/lockdep.c:4566
Code: 37 8b 48 8d 04 13 48 c7 44 24 48 a0 7e 5c 81 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 00 f2 f2 f2 c7 40 10 00 00 00 f3 40 14 f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 10 01
RSP: 0018:ffffc9000c64f9f8 EFLAGS: 00000802
RAX: fffff520018c9f46 RBX: 1ffff920018c9f46 RCX: 1ffffffff1ff13ae
RDX: dffffc0000000000 RSI: ffff88807da8e160 RDI: ffff88807da8d700
RBP: ffff88807da8e182 R08: 0000000000000000 R09: ffffffff8ff76a37
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000008
R13: ffff88807da8d700 R14: 0000000000000000 R15: 0000000000000003
FS: 00007f527a66f8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5277ab4000 CR3: 000000001c9dd000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4526 [inline]
__lock_acquire+0x8a7/0x54a0 kernel/locking/lockdep.c:4981
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__might_fault mm/memory.c:5253 [inline]
__might_fault+0x104/0x170 mm/memory.c:5238
strncpy_from_user+0x2f/0x3e0 lib/strncpy_from_user.c:117
getname_flags.part.0+0x95/0x4f0 fs/namei.c:149
getname_flags+0x9a/0xe0 include/linux/audit.h:323
user_path_at_empty+0x2b/0x60 fs/namei.c:2800
user_path_at include/linux/namei.h:57 [inline]
do_faccessat+0x127/0x850 fs/open.c:421
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: 0033:0x7f527992a9c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffde6b6cfd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffde6b6fef0 RCX: 00007f527992a9c7
RDX: 00007f527a39ba00 RSI: 0000000000000000 RDI: 000055f5a39049a3
RBP: 00007ffde6b6d010 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffde6b6fef0 R15: 00007ffde6b6d500
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 8b 48 8d mov -0x73(%rax),%ecx
3: 04 13 add $0x13,%al
5: 48 c7 44 24 48 a0 7e movq $0xffffffff815c7ea0,0x48(%rsp)
c: 5c 81
e: c7 00 f1 f1 f1 f1 movl $0xf1f1f1f1,(%rax)
14: c7 40 04 00 f2 f2 f2 movl $0xf2f2f200,0x4(%rax)
1b: c7 40 08 00 f2 f2 f2 movl $0xf2f2f200,0x8(%rax)
22: c7 40 10 00 00 00 f3 movl $0xf3000000,0x10(%rax)
* 29: c7 40 14 f3 f3 f3 f3 movl $0xf3f3f3f3,0x14(%rax) <-- trapping instruction
30: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
37: 00 00
39: 48 rex.W
3a: 89 .byte 0x89
3b: 84 24 10 test %ah,(%rax,%rdx,1)
3e: 01 .byte 0x1