INFO: task syz-executor.2:10831 blocked for more than 143 seconds.
      Not tainted 5.12.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:28600 pid:10831 ppid:  8434 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_timeout+0x1db/0x250 kernel/time/timer.c:1868
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x168/0x270 kernel/sched/completion.c:138
 io_sq_thread_finish+0xa2/0x650 fs/io_uring.c:7127
 io_sq_offload_create fs/io_uring.c:7928 [inline]
 io_uring_create fs/io_uring.c:9401 [inline]
 io_uring_setup+0x2234/0x2930 fs/io_uring.c:9484
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465f69
RSP: 002b:00007f697b818108 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69
RDX: 0000000020ffd000 RSI: 0000000020002440 RDI: 0000000000005630
RBP: 0000000020002440 R08: 0000000020002500 R09: 0000000020002500
R10: 00000000200024c0 R11: 0000000000000202 R12: 0000000020002500
R13: 0000000020ffd000 R14: 00000000200024c0 R15: 0000000020ffc000

Showing all locks held in the system:
3 locks held by kworker/u4:1/25:
 #0: ffff8880b9d35198 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1321 [inline]
 #0: ffff8880b9d35198 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4992
 #1: ffffffff8bf74220 (rcu_read_lock){....}-{1:2}, at: cpu_of kernel/sched/sched.h:1086 [inline]
 #1: ffffffff8bf74220 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x39/0x430 kernel/sched/fair.c:6045
 #2: ffffffff8bf74220 (rcu_read_lock){....}-{1:2}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:402 [inline]
 #2: ffffffff8bf74220 (rcu_read_lock){....}-{1:2}, at: batadv_nc_worker+0xf3/0xe50 net/batman-adv/network-coding.c:715
1 lock held by khungtaskd/1632:
 #0: ffffffff8bf74220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1632 Comm: khungtaskd Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 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:209 [inline]
 watchdog+0xd48/0xfb0 kernel/hung_task.c:294
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:rdrand_long arch/x86/include/asm/archrandom.h:25 [inline]
RIP: 0010:arch_get_random_long arch/x86/include/asm/archrandom.h:75 [inline]
RIP: 0010:arch_get_random_long arch/x86/include/asm/archrandom.h:73 [inline]
RIP: 0010:_extract_crng+0xee/0x250 drivers/char/random.c:1008
Code: 50 fd 4c 8d 7d 48 4c 89 ff e8 3e f9 e2 04 48 89 04 24 0f 1f 44 00 00 e8 a0 40 50 fd bb 0a 00 00 00 e8 96 40 50 fd 49 0f c7 f4 <41> 0f 92 c5 31 ff 44 89 ee e8 34 47 50 fd 45 84 ed 0f 85 e6 00 00
RSP: 0018:ffffc90000da7b20 EFLAGS: 00000003
RAX: 0000000000000000 RBX: 000000000000000a RCX: 0000000000000000
RDX: ffff888011620000 RSI: ffffffff84235dca RDI: ffffc90000da7a90
RBP: ffff8880109a5d00 R08: 0000000000000001 R09: 0000000000000003
R10: fffff520001b4f52 R11: 0000000000000000 R12: caea4ef466cf7101
R13: ffffc90000da7ba8 R14: ffffc90000da7ba8 R15: ffff8880109a5d48
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f540f274000 CR3: 000000001e10d000 CR4: 0000000000350ee0
Call Trace:
 extract_crng drivers/char/random.c:1026 [inline]
 _get_random_bytes+0x229/0x670 drivers/char/random.c:1549
 eth_random_addr include/linux/etherdevice.h:225 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:520 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:570 [inline]
 nsim_dev_trap_report_work+0x34c/0xbd0 drivers/net/netdevsim/dev.c:611
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294