INFO: task syz.2.732:8388 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.732       state:D stack:24008 pid:8388  tgid:8387  ppid:5848   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x9a/0x270
 wait_for_completion+0x2bf/0x5d0
 disable_device+0x1c6/0x320
 __ib_unregister_device+0x2cb/0x3f0
 ib_unregister_device_and_put+0xb8/0xf0
 nldev_dellink+0x2d1/0x320
 rdma_nl_rcv+0x6ae/0x980
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3bbb98ebe9
RSP: 002b:00007f3bbc791038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3bbbbb5fa0 RCX: 00007f3bbb98ebe9
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 000000000000000a
RBP: 00007f3bbba11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3bbbbb6038 R14: 00007f3bbbbb5fa0 R15: 00007fff3705f7e8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9957 Comm: kworker/u10:10 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
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:chacha_permute+0x40a/0xf00
Code: 01 f2 31 d0 c1 c0 10 44 01 fe 31 f5 c1 c5 10 44 01 df 31 fb c1 c3 10 45 01 e8 45 31 c4 41 c1 c4 0c 01 c1 41 31 ce 41 c1 c6 0c <44> 8b 0c 24 41 01 e9 44 89 0c 24 45 31 cf 41 c1 c7 0c 45 89 e1 44
RSP: 0018:ffffc90003bff450 EFLAGS: 00000007
RAX: 00000000d844ee64 RBX: 00000000db333218 RCX: 00000000fd5f71be
RDX: 00000000ba697480 RSI: 000000003848ec21 RDI: 00000000b718b0bd
RBP: 00000000cb9dc73a R08: 000000007a856b71 R09: 000000002225f3ba
R10: 000000005345da98 R11: 000000000b1fb4d2 R12: 00000000888ba55c
R13: 00000000bf7c0a26 R14: 00000000609726b1 R15: 00000000c119f9f1
FS:  0000000000000000(0000) GS:ffff8881a3c1a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffccc44ec88 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 chacha_block_generic+0x53/0xc80
 crng_fast_key_erasure+0x14f/0x240
 crng_make_state+0x255/0x700
 _get_random_bytes+0xd5/0x210
 nsim_dev_trap_report_work+0x69e/0xb80
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
