INFO: task syz-executor.1:21825 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.1 state:D stack:26600 pid:21825 ppid: 18470 flags:0x00000004
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: 0033:0x7efd1c34eae9
RSP: 002b:00007efd198c4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efd1c461f60 RCX: 00007efd1c34eae9
RDX: 0000000020000400 RSI: 0000000000004c02 RDI: 0000000000000004
RBP: 00007efd1c3a8f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc43accbaf R14: 00007efd198c4300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6214:
#0: ffff888019781c70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by rs:main Q:Reg/6215:
#0: ffff88801da07270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffff88814af8a460 (sb_writers#5){.+.+}-{0:0}, at: ksys_write+0x12d/0x250 fs/read_write.c:643
3 locks held by kworker/u4:11/15824:
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:486 [inline]
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x8c/0x120 kernel/sched/core.c:471
#1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880
#2: ffff88801cdee0d0 (&wb->list_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline]
#2: ffff88801cdee0d0 (&wb->list_lock){+.+.}-{2:2}, at: __wb_update_bandwidth+0x7a/0x5a0 mm/page-writeback.c:1343
2 locks held by systemd-udevd/21485:
#0: ffff88801c9a1118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff8880810d6360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by syz-executor.1/21825:
#0: ffff8880810d6360 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 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: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: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: 2781 Comm: kworker/u4:8 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_tt_purge
RIP: 0010:mark_lock+0xa0/0x17b0 kernel/locking/lockdep.c:4583
Code: 89 84 24 10 01 00 00 31 c0 41 83 fc 09 0f 87 3f 01 00 00 41 83 fc 08 49 89 f5 0f 84 f6 00 00 00 bd 01 00 00 00 44 89 e1 d3 e5 <48> 63 ed 4d 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1
RSP: 0018:ffffc90004effad0 EFLAGS: 00000012
RAX: 0000000000000000 RBX: 1ffff920009dff61 RCX: 0000000000000006
RDX: dffffc0000000000 RSI: ffff88803ab1c460 RDI: ffff88803ab1ba00
RBP: 0000000000000040 R08: 0000000000000000 R09: ffffffff8ff71af7
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000006
R13: ffff88803ab1c460 R14: ffff88803ab1c460 R15: 000000000000021b
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd3662f018 CR3: 000000001db03000 CR4: 0000000000350ef0
Call Trace:
mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4206
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4232 [inline]
lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4292 [inline]
lockdep_hardirqs_on_prepare+0x28b/0x400 kernel/locking/lockdep.c:4244
trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49
__local_bh_enable_ip+0xa0/0x120 kernel/softirq.c:388
spin_unlock_bh include/linux/spinlock.h:394 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2300 [inline]
batadv_tt_purge+0x3a3/0xaf0 net/batman-adv/translation-table.c:3562
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):
0: 89 84 24 10 01 00 00 mov %eax,0x110(%rsp)
7: 31 c0 xor %eax,%eax
9: 41 83 fc 09 cmp $0x9,%r12d
d: 0f 87 3f 01 00 00 ja 0x152
13: 41 83 fc 08 cmp $0x8,%r12d
17: 49 89 f5 mov %rsi,%r13
1a: 0f 84 f6 00 00 00 je 0x116
20: bd 01 00 00 00 mov $0x1,%ebp
25: 44 89 e1 mov %r12d,%ecx
28: d3 e5 shl %cl,%ebp
* 2a: 48 63 ed movslq %ebp,%rbp <-- trapping instruction
2d: 4d 8d 7d 20 lea 0x20(%r13),%r15
31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
38: fc ff df
3b: 4c 89 fa mov %r15,%rdx
3e: 48 rex.W
3f: c1 .byte 0xc1