INFO: task syz-executor.4:4929 can't die for more than 143 seconds.
task:syz-executor.4 state:D stack:26960 pid: 4929 ppid: 6596 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
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: 0033:0x7fde048898a7
RSP: 002b:00007fde01dfefa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000200003c0 RCX: 00007fde048898a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000007
RBP: 00007fde01dff6bc R08: 00007fde01dff040 R09: 0000000020000080
R10: 0000000000000001 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007fde01dff000 R15: 0000000020000500
INFO: task syz-executor.4:4929 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.4 state:D stack:26960 pid: 4929 ppid: 6596 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
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: 0033:0x7fde048898a7
RSP: 002b:00007fde01dfefa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000200003c0 RCX: 00007fde048898a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000007
RBP: 00007fde01dff6bc R08: 00007fde01dff040 R09: 0000000020000080
R10: 0000000000000001 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007fde01dff000 R15: 0000000020000500
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 in:imklog/6227:
2 locks held by systemd-udevd/11207:
#0: ffff888147158118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801a8c3b60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by syz-executor.4/4929:
#0: ffff88801a8c3b60 (&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: 1102 Comm: kworker/u4:6 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_purge_orig
RIP: 0010:mark_usage kernel/locking/lockdep.c:4485 [inline]
RIP: 0010:__lock_acquire+0x7be/0x54a0 kernel/locking/lockdep.c:4981
Code: 5c 24 21 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 0f b6 04 02 48 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 da 38 00 00 <84> db 41 0f b6 44 24 22 78 60 a8 03 0f 84 a3 09 00 00 65 8b 05 51
RSP: 0018:ffffc900054979b8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000006 RCX: ffffffff815c591d
RDX: 0000000000000002 RSI: 0000000000000008 RDI: ffff88801c204559
RBP: ffff88801c20455a R08: 0000000000000000 R09: ffffffff8ff72adf
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801c204538
R13: ffff88801c203a80 R14: ffff88801c2044e8 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43ebf87008 CR3: 0000000015c1a000 CR4: 00000000003506f0
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_purge_orig_ref+0x176/0x1550 net/batman-adv/originator.c:1243
batadv_purge_orig+0x17/0x60 net/batman-adv/originator.c:1272
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: 5c pop %rsp
1: 24 21 and $0x21,%al
3: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
a: fc ff df
d: 48 89 ea mov %rbp,%rdx
10: 48 c1 ea 03 shr $0x3,%rdx
14: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax
18: 48 89 ea mov %rbp,%rdx
1b: 83 e2 07 and $0x7,%edx
1e: 38 d0 cmp %dl,%al
20: 7f 08 jg 0x2a
22: 84 c0 test %al,%al
24: 0f 85 da 38 00 00 jne 0x3904
* 2a: 84 db test %bl,%bl <-- trapping instruction
2c: 41 0f b6 44 24 22 movzbl 0x22(%r12),%eax
32: 78 60 js 0x94
34: a8 03 test $0x3,%al
36: 0f 84 a3 09 00 00 je 0x9df
3c: 65 gs
3d: 8b .byte 0x8b
3e: 05 .byte 0x5
3f: 51 push %rcx