INFO: task syz-executor.0:7669 blocked for more than 143 seconds.
Not tainted 5.18.0-rc1-syzkaller-00016-g3e732ebf7316 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27120 pid: 7669 ppid: 3627 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0x937/0x1090 kernel/sched/core.c:6382
schedule+0xeb/0x1b0 kernel/sched/core.c:6454
blk_mq_freeze_queue_wait+0x105/0x190 block/blk-mq.c:179
nbd_add_socket+0x17b/0x8e0 drivers/block/nbd.c:1109
__nbd_ioctl drivers/block/nbd.c:1454 [inline]
nbd_ioctl+0x263/0xb80 drivers/block/nbd.c:1511
blkdev_ioctl+0x3a6/0x780 block/ioctl.c:588
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f6382c89049
RSP: 002b:00007f6381bfe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6382d9bf60 RCX: 00007f6382c89049
RDX: 0000000000000005 RSI: 000000000000ab00 RDI: 0000000000000004
RBP: 00007f6382ce308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcae0fc65f R14: 00007f6381bfe300 R15: 0000000000022000
INFO: task syz-executor.0:7672 blocked for more than 143 seconds.
Not tainted 5.18.0-rc1-syzkaller-00016-g3e732ebf7316 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28736 pid: 7672 ppid: 3627 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0x937/0x1090 kernel/sched/core.c:6382
schedule+0xeb/0x1b0 kernel/sched/core.c:6454
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6513
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:673
__mutex_lock kernel/locking/mutex.c:733 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785
nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504
blkdev_ioctl+0x3a6/0x780 block/ioctl.c:588
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f6382c89049
RSP: 002b:00007f6381bdd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6382d9c030 RCX: 00007f6382c89049
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000004
RBP: 00007f6382ce308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcae0fc65f R14: 00007f6381bdd300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8cd1cd60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3273:
#0: ffff88807fa20098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002e732e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c2/0x1c60 drivers/tty/n_tty.c:2075
1 lock held by syz-executor.0/7669:
#0: ffff88801cc95998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504
1 lock held by syz-executor.0/7672:
#0: ffff88801cc95998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc1-syzkaller-00016-g3e732ebf7316 #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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:369
kthread+0x2a3/0x2d0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 55 Comm: kworker/u4:3 Not tainted 5.18.0-rc1-syzkaller-00016-g3e732ebf7316 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_mcast_mla_update
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:164 [inline]
RIP: 0010:unwind_next_frame+0x208/0x1fc0 arch/x86/kernel/unwind_orc.c:443
Code: 48 c1 e8 03 42 8a 04 30 84 c0 0f 85 89 18 00 00 44 8b 3b 89 e8 ff c0 48 8d 1c 85 6c f9 2f 8f 48 89 d8 48 c1 e8 03 42 8a 04 30 <84> c0 0f 85 84 18 00 00 44 8b 03 41 ff c0 4b 8d 04 7f 48 8d 94 00
RSP: 0018:ffffc900013df500 EFLAGS: 00000a02
RAX: 1ffffffff1e66a00 RBX: ffffffff8f3357e8 RCX: 0000000000096076
RDX: ffffc900013df998 RSI: ffffffff81d79e76 RDI: ffffffff813b53b9
RBP: 000000000000d79e R08: 0000000000000002 R09: ffffc900013df6b0
R10: fffff5200027bec4 R11: 0000000000000000 R12: ffffffff81d79e75
R13: ffffc900013df501 R14: dffffc0000000000 R15: 000000000002c9a4
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564eb4e2e680 CR3: 000000007e42f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4c/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x136/0x1e0 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:200 [inline]
slab_free_hook mm/slub.c:1728 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1754
slab_free mm/slub.c:3510 [inline]
kfree+0xc6/0x390 mm/slub.c:4552
batadv_mcast_mla_list_free net/batman-adv/multicast.c:639 [inline]
__batadv_mcast_mla_update net/batman-adv/multicast.c:894 [inline]
batadv_mcast_mla_update+0x3570/0x3ab0 net/batman-adv/multicast.c:916
process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289
worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436
kthread+0x2a3/0x2d0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 48 c1 e8 03 shr $0x3,%rax
4: 42 8a 04 30 mov (%rax,%r14,1),%al
8: 84 c0 test %al,%al
a: 0f 85 89 18 00 00 jne 0x1899
10: 44 8b 3b mov (%rbx),%r15d
13: 89 e8 mov %ebp,%eax
15: ff c0 inc %eax
17: 48 8d 1c 85 6c f9 2f lea -0x70d00694(,%rax,4),%rbx
1e: 8f
1f: 48 89 d8 mov %rbx,%rax
22: 48 c1 e8 03 shr $0x3,%rax
26: 42 8a 04 30 mov (%rax,%r14,1),%al
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 84 18 00 00 jne 0x18b6
32: 44 8b 03 mov (%rbx),%r8d
35: 41 ff c0 inc %r8d
38: 4b 8d 04 7f lea (%r15,%r15,2),%rax
3c: 48 rex.W
3d: 8d .byte 0x8d
3e: 94 xchg %eax,%esp