INFO: task syz-executor.1:8001 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:23416 pid: 8001 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
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_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
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: 0033:0x7f49557dda04
RSP: 002b:00007ffde871a4b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffde871a5b0 RCX: 00007f49557dda04
RDX: 0000000000000002 RSI: 00007ffde871a5f0 RDI: 00000000ffffff9c
RBP: 00007ffde871a5f0 R08: 0000000000000000 R09: 00007ffde871a3c0
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 0000000000000000 R14: 000000000000000d R15: 00007ffde871a5f0
INFO: task systemd-udevd:11020 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:26896 pid:11020 ppid: 2971 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
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
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: 0033:0x7fc2f5419270
RSP: 002b:00007ffea5f0df78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fc2f5419270
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007fc2f62d3710 R08: 000055d34e6f70d0 R09: 000055d34e6f6e00
R10: 00007fc2f62d38c0 R11: 0000000000000246 R12: 0000000000000000
R13: 000055d34e6f3d70 R14: 0000000000000003 R15: 000000000000000e
Showing all locks held in the system:
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
5 locks held by kworker/u4:4/1042:
3 locks held by in:imklog/6256:
#0: ffff88807a9194f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffffffff8bb83ba0 (rcu_read_lock){....}-{1:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#2: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: trace_sched_stat_runtime include/trace/events/sched.h:517 [inline]
#2: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: update_curr+0x370/0x900 kernel/sched/fair.c:876
1 lock held by syz-executor.1/8001:
#0: ffff88801ab68918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
2 locks held by systemd-udevd/11020:
#0: ffff88801ab68918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff88801ab14b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
=============================================
NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1042 Comm: kworker/u4:4 Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: 0x0 (phy7)
RIP: 0010:pwq_dec_nr_in_flight+0x20/0x2a0 kernel/workqueue.c:1192
Code: e9 5b ff ff ff 0f 1f 44 00 00 41 55 41 54 55 48 89 fd 53 48 89 f3 e8 8f 7c 2b 00 49 89 dc 83 e3 02 31 ff 49 c1 ec 05 48 89 de 0b 7f 2b 00 41 83 e4 0f 48 85 db 0f 85 a5 00 00 00 e8 69 7c 2b
RSP: 0018:ffffc90005507cf8 EFLAGS: 00000802
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801c6c3a80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88802292a800 R08: 0000000000000000 R09: 0000000000000003
R10: ffffffff814c3509 R11: 0000000000000000 R12: 07fffc4401149540
R13: ffff88806ed597d8 R14: ffff88801b57e700 R15: ffff888010c69800
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6587ee000 CR3: 000000001c935000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
process_one_work+0xc9c/0x1690 kernel/workqueue.c:2341
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: e9 5b ff ff ff jmpq 0xffffff60
5: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
a: 41 55 push %r13
c: 41 54 push %r12
e: 55 push %rbp
f: 48 89 fd mov %rdi,%rbp
12: 53 push %rbx
13: 48 89 f3 mov %rsi,%rbx
16: e8 8f 7c 2b 00 callq 0x2b7caa
1b: 49 89 dc mov %rbx,%r12
1e: 83 e3 02 and $0x2,%ebx
21: 31 ff xor %edi,%edi
23: 49 c1 ec 05 shr $0x5,%r12
27: 48 89 de mov %rbx,%rsi
* 2a: e8 0b 7f 2b 00 callq 0x2b7f3a <-- trapping instruction
2f: 41 83 e4 0f and $0xf,%r12d
33: 48 85 db test %rbx,%rbx
36: 0f 85 a5 00 00 00 jne 0xe1
3c: e8 .byte 0xe8
3d: 69 .byte 0x69
3e: 7c 2b jl 0x6b