INFO: task systemd-udevd:14111 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-next-20211117-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-udevd state:D stack:27016 pid:14111 ppid: 2973 flags:0x00004000
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
lo_release+0x160/0x1f0 drivers/block/loop.c:1768
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: 0033:0x7feb2ef28270
RSP: 002b:00007fffe93dcaf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007feb2ef28270
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007feb2fde2710 R08: 000055d5a190a0d0 R09: 000055d5a1909e00
R10: 00007feb2fde28c0 R11: 0000000000000246 R12: 0000000000000000
R13: 000055d5a190ad10 R14: 0000000000000003 R15: 000000000000000e
INFO: task syz-executor.3:14135 can't die for more than 143 seconds.
task:syz-executor.3 state:D stack:28328 pid:14135 ppid: 15066 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+0x24e/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: 0033:0x7f4327675a04
RSP: 002b:00007f4324c37cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f4327675a04
RDX: 0000000000103382 RSI: 00007f4324c37d60 RDI: 00000000ffffff9c
RBP: 00007f4324c37d60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000103382
R13: 00007fff259fd75f R14: 00007f4324c38300 R15: 0000000000022000
INFO: task syz-executor.3:14135 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-next-20211117-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28328 pid:14135 ppid: 15066 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+0x24e/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: 0033:0x7f4327675a04
RSP: 002b:00007f4324c37cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f4327675a04
RDX: 0000000000103382 RSI: 00007f4324c37d60 RDI: 00000000ffffff9c
RBP: 00007f4324c37d60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000103382
R13: 00007fff259fd75f R14: 00007f4324c38300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83b20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-journal/2963:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
2 locks held by agetty/6443:
#0: ffff88807bef6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc900029df2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by kworker/u4:3/11132:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880
2 locks held by systemd-udevd/14111:
#0: ffff88801a46d918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff88801a469360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:1748
1 lock held by syz-executor.3/14135:
#0: ffff88801a46d918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x24e/0xb50 block/bdev.c:819
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-next-20211117-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: 2963 Comm: systemd-journal Not tainted 5.16.0-rc1-next-20211117-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_splice include/linux/list.h:445 [inline]
RIP: 0010:list_splice_init include/linux/list.h:484 [inline]
RIP: 0010:ep_start_scan+0x13d/0x270 fs/eventpoll.c:615
Code: 08 4c 8b b3 38 01 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 11 00 0f 85 03 01 00 00 4c 89 f2 48 89 68 08 <48> c1 ea 03 48 89 45 00 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00
RSP: 0018:ffffc90001ff7c48 EFLAGS: 00000046
RAX: ffff888022177cd8 RBX: ffff88807ab28400 RCX: 1ffff1100442ef9c
RDX: ffff888022177cd8 RSI: ffffffff81dd8038 RDI: ffff888022177ce0
RBP: ffffc90001ff7d88 R08: 0000000000000001 R09: 0000000000000003
R10: fffff520003fef7b R11: 0000000000000000 R12: ffff88807ab28530
R13: ffff88807ab28540 R14: ffff888022177cd8 R15: ffffc90001ff7d88
FS: 00007f8f5525d8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f5058b000 CR3: 000000007af90000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ep_send_events fs/eventpoll.c:1649 [inline]
ep_poll fs/eventpoll.c:1799 [inline]
do_epoll_wait+0x607/0x1940 fs/eventpoll.c:2227
__do_sys_epoll_wait fs/eventpoll.c:2239 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2234 [inline]
__x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2234
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: 0033:0x7f8f54526303
Code: 49 89 ca b8 e8 00 00 00 0f 05 48 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24 49 89 ca b8 e8 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 51 c2 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffe32e22f40 EFLAGS: 00000293 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 000055f2a71901e0 RCX: 00007f8f54526303
RDX: 0000000000000014 RSI: 00007ffe32e22f50 RDI: 0000000000000008
RBP: 00007ffe32e23140 R08: 000000006195d970 R09: 00007ffe32e90080
R10: 00000000ffffffff R11: 0000000000000293 R12: 00007ffe32e22f50
R13: 0000000000000001 R14: ffffffffffffffff R15: 0005d108c51744e2
----------------
Code disassembly (best guess):
0: 08 4c 8b b3 or %cl,-0x4d(%rbx,%rcx,4)
4: 38 01 cmp %al,(%rcx)
6: 00 00 add %al,(%rax)
8: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
f: fc ff df
12: 48 89 f9 mov %rdi,%rcx
15: 48 c1 e9 03 shr $0x3,%rcx
19: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1)
1d: 0f 85 03 01 00 00 jne 0x126
23: 4c 89 f2 mov %r14,%rdx
26: 48 89 68 08 mov %rbp,0x8(%rax)
* 2a: 48 c1 ea 03 shr $0x3,%rdx <-- trapping instruction
2e: 48 89 45 00 mov %rax,0x0(%rbp)
32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
39: fc ff df
3c: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)