INFO: task syz-executor.0:6558 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23552 pid: 6558 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
__loop_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122
lo_release+0x1ac/0x1f0 drivers/block/loop.c:1761
blkdev_put_whole block/bdev.c:694 [inline]
blkdev_put+0x2fb/0x9e0 block/bdev.c:956
deactivate_locked_super+0x94/0x160 fs/super.c:335
deactivate_super+0xad/0xd0 fs/super.c:366
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1137
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f2a2be16f57
RSP: 002b:00007ffc7e929a28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2a2be16f57
RDX: 00007ffc7e929afa RSI: 000000000000000a RDI: 00007ffc7e929af0
RBP: 00007ffc7e929af0 R08: 00000000ffffffff R09: 00007ffc7e9298c0
R10: 0000555555974903 R11: 0000000000000246 R12: 00007f2a2be6f105
R13: 00007ffc7e92abb0 R14: 0000555555974810 R15: 00007ffc7e92abf0
INFO: task systemd-udevd:9942 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-udevd state:D stack:27848 pid: 9942 ppid: 2977 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1232
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: 0033:0x7feb19b57840
RSP: 002b:00007ffeb750c6f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055aa932913a0 RCX: 00007feb19b57840
RDX: 000055aa92f14fe3 RSI: 00000000000a0800 RDI: 000055aa9328cc40
RBP: 00007ffeb750c870 R08: 000055aa92f14670 R09: 0000000000000010
R10: 000055aa92f14d0c R11: 0000000000000246 R12: 00007ffeb750c7c0
R13: 000055aa9328ca10 R14: 0000000000000003 R15: 000000000000000e
Showing all locks held in the system:
5 locks held by kworker/u4:1/10:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6434:
#0: ffff888079efc870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by syz-executor.0/6558:
#0: ffff88801a28d118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff88801a288b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
1 lock held by systemd-udevd/9942:
#0: ffff88801a28d118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-next-20211118-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:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2968 Comm: systemd-journal Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_acquire+0xa/0x510 kernel/locking/lockdep.c:5605
Code: 61 00 e9 b7 fe ff ff 48 c7 c7 08 1c 91 8d e8 8d b3 61 00 e9 fb fe ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df <41> 57 41 89 f7 41 56 49 89 fe 41 55 41 89 d5 41 54 41 89 cc 55 44
RSP: 0018:ffffc900027ffb70 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc900027ffce0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888076141248
RBP: ffff888076141230 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff81cc1123 R11: 0000000000000000 R12: 0000000000000002
R13: ffffc900027ffce8 R14: 0000000000000040 R15: 0000000000000040
FS: 00007faa109b08c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa0de45000 CR3: 000000001c188000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:354 [inline]
lockref_get_not_dead+0x14/0x80 lib/lockref.c:211
__legitimize_path+0x7f/0x1c0 fs/namei.c:698
legitimize_path fs/namei.c:708 [inline]
try_to_unlazy+0x10a/0x3b0 fs/namei.c:777
complete_walk+0x10d/0x320 fs/namei.c:883
path_lookupat+0x2d1/0x860 fs/namei.c:2456
filename_lookup+0x1c6/0x590 fs/namei.c:2478
user_path_at_empty+0x42/0x60 fs/namei.c:2801
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: 0033:0x7faa0fc6b9c7
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:00007ffd5027cf78 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffd5027fe90 RCX: 00007faa0fc6b9c7
RDX: 00007faa106dca00 RSI: 0000000000000000 RDI: 0000558f786879a3
RBP: 00007ffd5027cfb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffd5027fe90 R15: 00007ffd5027d4a0
----------------
Code disassembly (best guess), 2 bytes skipped:
0: e9 b7 fe ff ff jmpq 0xfffffebc
5: 48 c7 c7 08 1c 91 8d mov $0xffffffff8d911c08,%rdi
c: e8 8d b3 61 00 callq 0x61b39e
11: e9 fb fe ff ff jmpq 0xffffff11
16: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
1d: 00
1e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
25: fc ff df
* 28: 41 57 push %r15 <-- trapping instruction
2a: 41 89 f7 mov %esi,%r15d
2d: 41 56 push %r14
2f: 49 89 fe mov %rdi,%r14
32: 41 55 push %r13
34: 41 89 d5 mov %edx,%r13d
37: 41 54 push %r12
39: 41 89 cc mov %ecx,%r12d
3c: 55 push %rbp
3d: 44 rex.R