INFO: task syz.1.19067:3293 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.19067     state:D stack:26032 pid:3293  tgid:3292  ppid:5614   task_flags:0x480140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x186d/0x5680
 schedule+0x164/0x360
 blk_mq_freeze_queue_wait+0x101/0x180
 queue_limits_commit_update_frozen+0x55/0xd0
 nbd_set_size+0x454/0x680
 nbd_genl_reconfigure+0x7f5/0x1ea0
 genl_family_rcv_msg_doit+0x22a/0x330
 genl_rcv_msg+0x61c/0x7a0
 netlink_rcv_skb+0x232/0x4b0
 genl_rcv+0x28/0x40
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x813/0xb40
 ____sys_sendmsg+0x972/0x9f0
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1b1/0x290
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f34dcb9ce59
RSP: 002b:00007f34ddb37028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f34dce15fa0 RCX: 00007f34dcb9ce59
RDX: 0000000000000050 RSI: 00002000000002c0 RDI: 0000000000000004
RBP: 00007f34dcc32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f34dce16038 R14: 00007f34dce15fa0 R15: 00007ffc459d3c28
 </TASK>
INFO: task syz.1.19067:3295 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.19067     state:D stack:27784 pid:3295  tgid:3292  ppid:5614   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x186d/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7d4/0x1570
 genl_rcv_msg+0x10b/0x7a0
 netlink_rcv_skb+0x232/0x4b0
 genl_rcv+0x28/0x40
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x813/0xb40
 __sys_sendto+0x626/0x6c0
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f34dcb5d68e
RSP: 002b:00007f34ddb14e88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f34ddb166c0 RCX: 00007f34dcb5d68e
RDX: 0000000000000024 RSI: 00007f34ddb15000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00007f34ddb14f04 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007f34ddb14f58 R14: 00007f34ddb15000 R15: 0000000000000000
 </TASK>
INFO: task syz.2.19073:3318 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19073     state:D stack:28952 pid:3318  tgid:3317  ppid:5607   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x186d/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7d4/0x1570
 genl_rcv_msg+0x10b/0x7a0
 netlink_rcv_skb+0x232/0x4b0
 genl_rcv+0x28/0x40
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x813/0xb40
 __sys_sendto+0x626/0x6c0
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f878d95d68e
RSP: 002b:00007f878e7dce88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f878e7de6c0 RCX: 00007f878d95d68e
RDX: 0000000000000020 RSI: 00007f878e7dd000 RDI: 0000000000000006
RBP: 0000000000000000 R08: 00007f878e7dcf04 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007f878e7dcf58 R14: 00007f878e7dd000 R15: 0000000000000000
 </TASK>
INFO: task syz.2.19073:3321 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19073     state:D stack:25000 pid:3321  tgid:3317  ppid:5607   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x186d/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7d4/0x1570
 genl_rcv_msg+0x10b/0x7a0
 netlink_rcv_skb+0x232/0x4b0
 genl_rcv+0x28/0x40
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x813/0xb40
 __sys_sendto+0x626/0x6c0
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f878d95d68e
RSP: 002b:00007f878e7bbe88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f878e7bd6c0 RCX: 00007f878d95d68e
RDX: 0000000000000020 RSI: 00007f878e7bc000 RDI: 0000000000000009
RBP: 0000000000000000 R08: 00007f878e7bbf04 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009
R13: 00007f878e7bbf58 R14: 00007f878e7bc000 R15: 0000000000000000
 </TASK>
INFO: task syz.2.19073:3323 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19073     state:D stack:25352 pid:3323  tgid:3317  ppid:5607   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x186d/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7d4/0x1570
 genl_rcv_msg+0x10b/0x7a0
 netlink_rcv_skb+0x232/0x4b0
 genl_rcv+0x28/0x40
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x813/0xb40
 __sys_sendto+0x626/0x6c0
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f878d95d68e
RSP: 002b:00007f878e79ae88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f878e79c6c0 RCX: 00007f878d95d68e
RDX: 000000000000001c RSI: 00007f878e79b000 RDI: 000000000000000e
RBP: 0000000000000000 R08: 00007f878e79af04 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000e
R13: 00007f878e79af58 R14: 00007f878e79b000 R15: 0000000000000000
 </TASK>
INFO: task syz.0.19074:3320 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.19074     state:D stack:28680 pid:3320  tgid:3319  ppid:5603   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x186d/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7d4/0x1570
 genl_rcv_msg+0x10b/0x7a0
 netlink_rcv_skb+0x232/0x4b0
 genl_rcv+0x28/0x40
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x813/0xb40
 __sys_sendto+0x626/0x6c0
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb23e55d68e
RSP: 002b:00007fb23f509e88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fb23f50b6c0 RCX: 00007fb23e55d68e
RDX: 000000000000001c RSI: 00007fb23f50a000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00007fb23f509f04 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007fb23f509f58 R14: 00007fb23f50a000 R15: 0000000000000000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:pv_native_safe_halt+0xf/0x20
Code: dc 78 02 e9 83 00 03 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 63 c7 19 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8e607de0 EFLAGS: 00000246
RAX: ffff88818dc4e000 RBX: ffffffff819aaa70 RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8c294240 RDI: ffffffff819aaa70
RBP: ffffffff8e607eb0 R08: ffff8881210338db R09: 1ffff1102420671b
R10: dffffc0000000000 R11: ffffed102420671c R12: 0000000000000000
R13: 1ffffffff1cd1de8 R14: 1ffffffff1cc0fc4 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88818dc4e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557f62268d58 CR3: 000000000e746000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 default_idle+0x9/0x20
 default_idle_call+0x72/0xb0
 do_idle+0x2e0/0x540
 cpu_startup_entry+0x43/0x60
 rest_init+0x2de/0x300
 start_kernel+0x38a/0x3e0
 x86_64_start_reservations+0x24/0x30
 x86_64_start_kernel+0x143/0x1c0
 common_startup_64+0x13e/0x157
 </TASK>
