INFO: task systemd-udevd:2968 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:22616 pid: 2968 ppid: 1 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: 0033:0x7f8526fe5840
RSP: 002b:00007ffd68d05078 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffd68d051a0 RCX: 00007f8526fe5840
RDX: 000055ad8a024fe3 RSI: 00000000000a0800 RDI: 000055ad8acf2d00
RBP: 0000000000000000 R08: 000055ad8a024670 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd68d05220
R13: 000055ad8ace3010 R14: 000055ad8acff310 R15: 00007ffd68d050f0
INFO: task syz-executor.2:13567 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.2 state:D stack:23592 pid:13567 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: 0033:0x7fc030cb2f57
RSP: 002b:00007ffde1f595d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc030cb2f57
RDX: 00007ffde1f596a9 RSI: 000000000000000a RDI: 00007ffde1f596a0
RBP: 00007ffde1f596a0 R08: 00000000ffffffff R09: 00007ffde1f59470
R10: 000055555647b873 R11: 0000000000000246 R12: 00007fc030d0b105
R13: 00007ffde1f5a760 R14: 000055555647b810 R15: 00007ffde1f5a7a0
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
2 locks held by kworker/u4:3/90:
1 lock held by systemd-udevd/2968:
#0: ffff88801a8b5918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
1 lock held by in:imklog/6259:
#0: ffff88802073cff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by syz-executor.2/13567:
#0: ffff88801a8b5918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff88801a8b1360 (&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: 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:check_preemption_disabled+0x3f/0x170 lib/smp_processor_id.c:56
Code: 8b 25 0d d0 c0 76 65 8b 1d 7e 2a c1 76 81 e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d <41> 5c 41 5d 41 5e c3 0f 1f 44 00 00 9c 5b 81 e3 00 02 00 00 31 ff
RSP: 0018:ffffc90001fc7930 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff920003f8f2c RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d90e7d7
R10: fffffbfff1b21cfa R11: 000000000000002f R12: 0000000000000001
R13: ffffffff89ac10c0 R14: ffff88802204ac50 R15: 0000000000000000
FS: 00007f392918d8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39266bb000 CR3: 000000001c748000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:433 [inline]
lock_acquire kernel/locking/lockdep.c:5636 [inline]
lock_acquire+0x170/0x510 kernel/locking/lockdep.c:5602
seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline]
set_root+0x3be/0x5b0 fs/namei.c:940
nd_jump_root+0x3c8/0x570 fs/namei.c:961
path_init+0x1020/0x1920 fs/namei.c:2359
path_parentat+0x22/0x1c0 fs/namei.c:2495
filename_parentat+0x1bb/0x5a0 fs/namei.c:2519
filename_create+0xa1/0x480 fs/namei.c:3637
do_mkdirat+0x94/0x300 fs/namei.c:3898
__do_sys_mkdir fs/namei.c:3929 [inline]
__se_sys_mkdir fs/namei.c:3927 [inline]
__x64_sys_mkdir+0xf2/0x140 fs/namei.c:3927
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: 0033:0x7f3928448687
Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd1cf58258 EFLAGS: 00000293 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffd1cf5b2c0 RCX: 00007f3928448687
RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055590ed518a0
RBP: 00007ffd1cf58290 R08: 000055590d4fa3e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 000055590ed518a0 R15: 00007ffd1cf588d0
----------------
Code disassembly (best guess):
0: 8b 25 0d d0 c0 76 mov 0x76c0d00d(%rip),%esp # 0x76c0d013
6: 65 8b 1d 7e 2a c1 76 mov %gs:0x76c12a7e(%rip),%ebx # 0x76c12a8b
d: 81 e3 ff ff ff 7f and $0x7fffffff,%ebx
13: 31 ff xor %edi,%edi
15: 89 de mov %ebx,%esi
17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1c: 85 db test %ebx,%ebx
1e: 74 11 je 0x31
20: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
25: 44 89 e0 mov %r12d,%eax
28: 5b pop %rbx
29: 5d pop %rbp
* 2a: 41 5c pop %r12 <-- trapping instruction
2c: 41 5d pop %r13
2e: 41 5e pop %r14
30: c3 retq
31: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
36: 9c pushfq
37: 5b pop %rbx
38: 81 e3 00 02 00 00 and $0x200,%ebx
3e: 31 ff xor %edi,%edi