INFO: task systemd-udevd:18890 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:26144 pid:18890 ppid: 2969 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: 0033:0x7f74920f7840
RSP: 002b:00007ffd0641a8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000564dcbf8fa20 RCX: 00007f74920f7840
RDX: 0000564dcb4dffe3 RSI: 00000000000a0800 RDI: 0000564dcbf88200
RBP: 00007ffd0641aa60 R08: 0000564dcb4df670 R09: 0000000000000010
R10: 0000564dcb4dfd0c R11: 0000000000000246 R12: 00007ffd0641a9b0
R13: 0000564dcbf7ae80 R14: 0000000000000003 R15: 000000000000000e
INFO: task syz-executor.1:27378 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.1 state:D stack:23888 pid:27378 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: 0033:0x7f63d0d82f57
RSP: 002b:00007ffd592f3bf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f63d0d82f57
RDX: 00007ffd592f3cca RSI: 000000000000000a RDI: 00007ffd592f3cc0
RBP: 00007ffd592f3cc0 R08: 00000000ffffffff R09: 00007ffd592f3a90
R10: 0000555555cd1903 R11: 0000000000000246 R12: 00007f63d0ddb105
R13: 00007ffd592f4d80 R14: 0000555555cd1810 R15: 00007ffd592f4dc0
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb83ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-udevd/2969:
1 lock held by in:imklog/6213:
#0: ffff88807b8ae370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by systemd-udevd/20030:
#0: ffff88807e8ec460 (sb_writers#3){.+.+}-{0:0}, at: do_unlinkat+0x17f/0x650 fs/namei.c:4146
#1: ffff88807070bb18 (&dentry->d_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
#1: ffff88807070bb18 (&dentry->d_lock){+.+.}-{2:2}, at: fast_dput fs/dcache.c:764 [inline]
#1: ffff88807070bb18 (&dentry->d_lock){+.+.}-{2:2}, at: fast_dput fs/dcache.c:740 [inline]
#1: ffff88807070bb18 (&dentry->d_lock){+.+.}-{2:2}, at: dput+0x4ac/0xbc0 fs/dcache.c:875
1 lock held by systemd-udevd/18890:
#0: ffff88801a7f3918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
2 locks held by syz-executor.1/27378:
#0: ffff88801a7f3918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff88801a797360 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2967 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:entry_SYSCALL_64+0x0/0x15 arch/x86/entry/entry_64.S:90
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <0f> 01 f8 65 48 89 24 25 14 a0 00 00 65 48 8b 24 25 10 70 02 00 6a
RSP: 0018:00007ffd176a6ad8 EFLAGS: 00000002
RAX: 0000000000000015 RBX: 00007ffd176a99f0 RCX: 00007f275a3599c7
RDX: 00007f275adcaa00 RSI: 0000000000000000 RDI: 000055a86e5db9a3
RBP: 00007ffd176a6b10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffd176a99f0 R15: 00007ffd176a7000
FS: 00007f275b09e8c0(0000) GS:ffff8880b9d00000(0000) knlGS:ffff8880b9d00000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f27576eb008 CR3: 000000001bd69000 CR4: 00000000003506e0
Call Trace:
----------------
Code disassembly (best guess):
0: cc int3
1: cc int3
2: cc int3
3: cc int3
4: cc int3
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: cc int3
a: cc int3
b: cc int3
c: cc int3
d: cc int3
e: cc int3
f: cc int3
10: cc int3
11: cc int3
12: cc int3
13: cc int3
14: cc int3
15: cc int3
16: cc int3
17: cc int3
18: cc int3
19: cc int3
1a: cc int3
1b: cc int3
1c: cc int3
1d: cc int3
1e: cc int3
1f: cc int3
20: cc int3
21: cc int3
22: cc int3
23: cc int3
24: cc int3
25: cc int3
26: cc int3
27: cc int3
28: cc int3
29: cc int3
* 2a: 0f 01 f8 swapgs <-- trapping instruction
2d: 65 48 89 24 25 14 a0 mov %rsp,%gs:0xa014
34: 00 00
36: 65 48 8b 24 25 10 70 mov %gs:0x27010,%rsp
3d: 02 00
3f: 6a .byte 0x6a