INFO: task syz-executor.3:11679 can't die for more than 143 seconds.
task:syz-executor.3 state:D stack:26224 pid:11679 ppid: 7993 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: 0033:0x7fa4f2ae78a7
RSP: 002b:00007fa4f005cfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020005400 RCX: 00007fa4f2ae78a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000005
RBP: 00007fa4f005d6bc R08: 00007fa4f005d040 R09: 0000000020004700
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000016 R14: 00007fa4f005d000 R15: 0000000020005500
INFO: task syz-executor.3:11679 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.3 state:D stack:26224 pid:11679 ppid: 7993 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: 0033:0x7fa4f2ae78a7
RSP: 002b:00007fa4f005cfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020005400 RCX: 00007fa4f2ae78a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000005
RBP: 00007fa4f005d6bc R08: 00007fa4f005d040 R09: 0000000020004700
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000016 R14: 00007fa4f005d000 R15: 0000000020005500
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/u4:5/979:
2 locks held by systemd-udevd/2972:
#0: ffff88801b612918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801b5fe360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by syz-executor.3/11679:
#0: ffff88801b5fe360 (&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: 979 Comm: kworker/u4:5 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+0x2d5/0x54a0 kernel/locking/lockdep.c:4964
Code: 0f 85 6b 39 00 00 49 8d 44 24 18 49 89 5c 24 10 48 89 c2 48 89 44 24 48 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 02 3b 00 00 48 8b 44 24 20 49 8d b5 4c 0a 00 00 48 ba 00 00
RSP: 0018:ffffc90005297a60 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff8bb83ba0 RCX: 0000000000000029
RDX: 1ffff110039cb502 RSI: 00000000000006c7 RDI: ffff88801ce5a808
RBP: 0000000000000000 R08: 1ffff110039cb4fe R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801ce5a7f8
R13: ffff88801ce59d40 R14: 0000000000000002 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f18bc98a000 CR3: 000000000b88e000 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
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x12d/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: 0f 85 6b 39 00 00 jne 0x3971
6: 49 8d 44 24 18 lea 0x18(%r12),%rax
b: 49 89 5c 24 10 mov %rbx,0x10(%r12)
10: 48 89 c2 mov %rax,%rdx
13: 48 89 44 24 48 mov %rax,0x48(%rsp)
18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1f: fc ff df
22: 48 c1 ea 03 shr $0x3,%rdx
26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
* 2a: 0f 85 02 3b 00 00 jne 0x3b32 <-- trapping instruction
30: 48 8b 44 24 20 mov 0x20(%rsp),%rax
35: 49 8d b5 4c 0a 00 00 lea 0xa4c(%r13),%rsi
3c: 48 rex.W
3d: ba .byte 0xba