INFO: task syz-executor.3:1224 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.3 state:D stack:26760 pid: 1224 ppid: 6794 flags:0x00004004
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
loop_set_status+0x440/0x930 drivers/block/loop.c:1264
loop_set_status_old+0x148/0x1b0 drivers/block/loop.c:1396
lo_ioctl+0x3e9/0x17c0 drivers/block/loop.c:1566
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7ff58fbd5ae9
RSP: 002b:00007ff58d14b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff58fce8f60 RCX: 00007ff58fbd5ae9
RDX: 00000000200003c0 RSI: 0000000000004c02 RDI: 0000000000000003
RBP: 00007ff58fc2ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff59021cb2f R14: 00007ff58d14b300 R15: 0000000000022000
INFO: task systemd-udevd:1231 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:systemd-udevd state:D stack:26928 pid: 1231 ppid: 2973 flags:0x00000000
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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
lo_release+0x4d/0x1f0 drivers/block/loop.c:1748
blkdev_put_whole block/bdev.c:694 [inline]
blkdev_put+0x2fb/0x9e0 block/bdev.c:956
blkdev_close+0x6a/0x80 block/fops.c:515
__fput+0x286/0x9f0 fs/file_table.c:280
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: 0033:0x7f74068a3270
RSP: 002b:00007fff84510a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f74068a3270
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007f740775d710 R08: 000055d78f2b50b0 R09: 000055d78f2b4e00
R10: 00007f740775d8c0 R11: 0000000000000246 R12: 0000000000000000
R13: 000055d78f2a27c0 R14: 0000000000000003 R15: 000000000000000e
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb83ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-journal/2961:
2 locks held by in:imklog/6235:
#0: ffff88807181fc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
1 lock held by syz-executor.0/6547:
#0: ffff88801a8fc118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
2 locks held by kworker/u4:0/24514:
1 lock held by syz-executor.3/1224:
#0: ffff8881473c5360 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248
2 locks held by systemd-udevd/1231:
#0: ffff88801a8fc118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff8881473c5360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:1748
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2961 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: 0033:0x7f1f8f62b650
Code: 89 c7 0f 83 77 ff ff ff 4c 89 e2 49 83 c6 15 48 89 de 4c 29 ea 49 29 de 4c 39 f2 49 0f 47 d6 e8 46 38 00 00 e9 56 ff ff ff 90 <66> 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9
RSP: 002b:00007ffc337c02f8 EFLAGS: 00000246
RAX: 0000000000000026 RBX: 00007ffc337c2d70 RCX: 0000000000000000
RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 0000561cb79eff70
RBP: 0000000000000000 R08: 0000561cb79ee960 R09: 0000000000000000
R10: 0000000000000075 R11: 00000000fffffff6 R12: 0000000000000000
R13: 0000000000000015 R14: 0000000000000001 R15: 0005d10b5d3322bf
FS: 00007f1f903cb8c0 GS: 0000000000000000