INFO: task syz-executor.2:17567 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.2 state:D stack:27376 pid:17567 ppid: 6557 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_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122
loop_clr_fd drivers/block/loop.c:1237 [inline]
lo_ioctl+0x398/0x17c0 drivers/block/loop.c:1562
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: 0033:0x7f1171d3c8a7
RSP: 002b:00007f116f2b1fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020001640 RCX: 00007f1171d3c8a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004
RBP: 00007f116f2b26bc R08: 00007f116f2b2040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007f116f2b2000 R15: 0000000020001740
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 systemd-journal/2958:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
2 locks held by systemd-udevd/2967:
#0: ffff88801a836918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801a832360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by in:imklog/6427:
#0: ffff88806f240870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by syz-executor.2/17567:
#0: ffff88801a832360 (&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-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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 26762 Comm: kworker/u4:12 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_nc_worker
RIP: 0010:check_preemption_disabled+0x33/0x170 lib/smp_processor_id.c:16
Code: 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 0d 3a be 76 65 8b 1d 7e 94 be 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
RSP: 0018:ffffc900187b7b70 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffffffff815cad81
RDX: fffffbfff1b22493 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffffff8a051960 R08: 0000000000000000 R09: ffffffff8d912497
R10: fffffbfff1b22492 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff8a051920 R14: dffffc0000000000 R15: 00000000000003ee
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa2e1ad1000 CR3: 000000006fc52000 CR4: 0000000000350ee0
Call Trace:
rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
rcu_is_watching+0xe/0xb0 kernel/rcu/tree.c:1121
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5648
rcu_lock_release include/linux/rcupdate.h:273 [inline]
rcu_read_unlock include/linux/rcupdate.h:721 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
batadv_nc_worker+0x86b/0xfa0 net/batman-adv/network-coding.c:723
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: 55 push %rbp
1: 48 89 fd mov %rdi,%rbp
4: 53 push %rbx
5: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
a: 65 44 8b 25 0d 3a be mov %gs:0x76be3a0d(%rip),%r12d # 0x76be3a1f
11: 76
12: 65 8b 1d 7e 94 be 76 mov %gs:0x76be947e(%rip),%ebx # 0x76be9497
19: 81 e3 ff ff ff 7f and $0x7fffffff,%ebx
1f: 31 ff xor %edi,%edi
21: 89 de mov %ebx,%esi
23: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
28: 85 db test %ebx,%ebx
* 2a: 74 11 je 0x3d <-- trapping instruction
2c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
31: 44 89 e0 mov %r12d,%eax
34: 5b pop %rbx
35: 5d pop %rbp
36: 41 5c pop %r12
38: 41 5d pop %r13
3a: 41 5e pop %r14
3c: c3 retq
3d: 0f .byte 0xf
3e: 1f (bad)
3f: 44 rex.R