INFO: task systemd-udevd:2971 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: 2971 ppid: 1 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
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: 0033:0x7f2ae477f840
RSP: 002b:00007ffdc60710b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffdc6071190 RCX: 00007f2ae477f840
RDX: 0000561204e60fe3 RSI: 00000000000a0800 RDI: 0000561205fb1980
RBP: 0000000000000000 R08: 0000561204e60670 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdc6071260
R13: 0000561205fac010 R14: 0000561205fbb050 R15: 00007ffdc6071130
INFO: task syz-executor.5:10249 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.5 state:D stack:23624 pid:10249 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: 0033:0x7f39f2792f57
RSP: 002b:00007ffc51c44628 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f39f2792f57
RDX: 00007ffc51c446fb RSI: 000000000000000a RDI: 00007ffc51c446f0
RBP: 00007ffc51c446f0 R08: 00000000ffffffff R09: 00007ffc51c444c0
R10: 00005555565d9873 R11: 0000000000000246 R12: 00007f39f27eb105
R13: 00007ffc51c457b0 R14: 00005555565d9810 R15: 00007ffc51c457f0
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
1 lock held by systemd-udevd/2971:
#0: ffff88801ae54118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
1 lock held by in:imklog/6224:
#0: ffff88807cb89770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by syz-executor.5/10249:
#0: ffff88801ae54118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff888146c41360 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
=============================================
NMI backtrace for cpu 1
CPU: 1 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 966 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: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x126/0x54a0 kernel/locking/lockdep.c:4926
Code: d6 48 89 df e8 2b 6d 00 00 48 85 c0 0f 84 18 0d 00 00 49 8d b5 60 0a 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 f1 48 89 34 24 <48> c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 03 0f 8e 33 14 00 00 48
RSP: 0018:ffffc90004f179e0 EFLAGS: 00000082
RAX: ffffffff8ffc3ee0 RBX: ffff888083139958 RCX: ffff88801c458a60
RDX: dffffc0000000000 RSI: ffff88801c458a60 RDI: ffff888083139960
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88801c458000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa9bc339000 CR3: 0000000011ff7000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:359 [inline]
batadv_nc_purge_paths+0xdf/0x3a0 net/batman-adv/network-coding.c:446
batadv_nc_worker+0x930/0xfa0 net/batman-adv/network-coding.c:726
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
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), 1 bytes skipped:
0: 48 89 df mov %rbx,%rdi
3: e8 2b 6d 00 00 callq 0x6d33
8: 48 85 c0 test %rax,%rax
b: 0f 84 18 0d 00 00 je 0xd29
11: 49 8d b5 60 0a 00 00 lea 0xa60(%r13),%rsi
18: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
1f: fc ff df
22: 48 89 f1 mov %rsi,%rcx
25: 48 89 34 24 mov %rsi,(%rsp)
* 29: 48 c1 e9 03 shr $0x3,%rcx <-- trapping instruction
2d: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx
31: 84 d2 test %dl,%dl
33: 74 09 je 0x3e
35: 80 fa 03 cmp $0x3,%dl
38: 0f 8e 33 14 00 00 jle 0x1471
3e: 48 rex.W