INFO: task syz.1.719:6240 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.719       state:D stack:0     pid:6240  tgid:6238  ppid:3203   task_flags:0x400640 flags:0x00000002
Call Trace:
[<ffffffff8643b712>] context_switch kernel/sched/core.c:5298 [inline]
[<ffffffff8643b712>] __schedule+0x18fa/0x4578 kernel/sched/core.c:6911
[<ffffffff8643e444>] __schedule_loop kernel/sched/core.c:6993 [inline]
[<ffffffff8643e444>] schedule+0xb4/0x334 kernel/sched/core.c:7008
[<ffffffff8645441a>] schedule_timeout+0x1c2/0x2a0 kernel/time/sleep_timeout.c:75
[<ffffffff8643ffe4>] do_wait_for_common kernel/sched/completion.c:100 [inline]
[<ffffffff8643ffe4>] __wait_for_common+0x1c0/0x3e8 kernel/sched/completion.c:121
[<ffffffff864402e6>] wait_for_common kernel/sched/completion.c:132 [inline]
[<ffffffff864402e6>] wait_for_completion_state+0x1a/0x2c kernel/sched/completion.c:269
[<ffffffff80eabb3a>] coredump_wait fs/coredump.c:534 [inline]
[<ffffffff80eabb3a>] vfs_coredump+0x702/0x55a4 fs/coredump.c:1197
[<ffffffff8019c4dc>] get_signal+0x1fe8/0x224c kernel/signal.c:3019
[<ffffffff80071e6e>] arch_do_signal_or_restart+0x632/0x1ddc arch/riscv/kernel/signal.c:534
[<ffffffff803d0a7e>] __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
[<ffffffff803d0a7e>] exit_to_user_mode_loop+0x8e/0x878 kernel/entry/common.c:98
[<ffffffff8642fe9c>] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
[<ffffffff8642fe9c>] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
[<ffffffff8642fe9c>] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
[<ffffffff8642fe9c>] do_trap_ecall_u+0x4e0/0x680 arch/riscv/kernel/traps.c:357
[<ffffffff8645a152>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffffffff887f4960 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a8 kernel/locking/lockdep.c:6771
3 locks held by kworker/u8:7/1041:
1 lock held by klogd/3013:
2 locks held by getty/3161:
 #0: ffffaf8012f1d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x48 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3be/0x1324 drivers/tty/n_tty.c:2211
2 locks held by sshd/3187:
1 lock held by syz-executor/3189:
4 locks held by kworker/u8:9/6655:
1 lock held by syz.2.764/6768:
2 locks held by syz.0.763/6769:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007b2a2>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:149
[<ffffffff80003384>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:155
[<ffffffff800601cc>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff800601cc>] dump_stack_lvl+0x114/0x1ac lib/dump_stack.c:120
[<ffffffff80060280>] dump_stack+0x1c/0x28 lib/dump_stack.c:129
[<ffffffff863f11f6>] nmi_cpu_backtrace+0x25e/0x3b0 lib/nmi_backtrace.c:113
[<ffffffff863f15e6>] nmi_trigger_cpumask_backtrace+0x29e/0x460 lib/nmi_backtrace.c:62
[<ffffffff80088828>] arch_trigger_cpumask_backtrace+0x2c/0x40 arch/riscv/kernel/smp.c:350
[<ffffffff86405ae8>] trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
[<ffffffff86405ae8>] __sys_info lib/sys_info.c:157 [inline]
[<ffffffff86405ae8>] sys_info+0x20c/0x254 lib/sys_info.c:165
[<ffffffff8051da32>] check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
[<ffffffff8051da32>] watchdog+0xab2/0x127c kernel/hung_task.c:515
[<ffffffff801edbe0>] kthread+0x31c/0x444 kernel/kthread.c:436
[<ffffffff80069138>] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:230
[<ffffffff8645a282>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:363
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6706 Comm: kworker/u8:10 Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_unbound nsim_dev_trap_report_work
epc : arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
epc : crng_make_state+0x2f0/0x6fc drivers/char/random.c:386
 ra : arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
 ra : crng_make_state+0x2ec/0x6fc drivers/char/random.c:386
epc : ffffffff81fbea38 ra : ffffffff81fbea34 sp : ffff8f80097a76f0
 gp : ffffffff8a22a0c0 tp : ffffaf8014709a80 t0 : ffff8f80097a7660
 t1 : ffffffff8007a848 t2 : 00000000000002f0 s0 : ffff8f80097a7770
 s1 : 0000000000000000 a0 : 0000000000000007 a1 : 0000000000000000
 a2 : 0000000000000002 a3 : ffffffff81fbea34 a4 : 0000000000000000
 a5 : ffffaf801470aa80 a6 : 0000000000000003 a7 : 0000000041b58ab3
 s2 : ffffaf8072c9ed40 s3 : 0000000000000003 s4 : 0000000000000002
 s5 : 0000000000000006 s6 : ffff8f80097a77a0 s7 : ffffaf803346c000
 s8 : ffffffff91601828 s9 : 1ffff5f00e593da2 s10: ffffaf8072c9ed10
 s11: ffffffff88fe5b80 t3 : ffffffff87fb2860 t4 : fffff1ef012f4ec4
 t5 : fffff1ef012f4ecc t6 : ffffaf803346c006 ssp : 0000000000000000
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff81fbea38>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff81fbea38>] crng_make_state+0x2f0/0x6fc drivers/char/random.c:386
[<ffffffff81fbef84>] _get_random_bytes+0x140/0x26c drivers/char/random.c:399
[<ffffffff81fbf0d0>] get_random_bytes+0x20/0x2c drivers/char/random.c:430
[<ffffffff83770004>] eth_random_addr include/linux/etherdevice.h:239 [inline]
[<ffffffff83770004>] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:826 [inline]
[<ffffffff83770004>] nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline]
[<ffffffff83770004>] nsim_dev_trap_report_work+0x2d4/0xbd8 drivers/net/netdevsim/dev.c:922
[<ffffffff801ca502>] process_one_work+0x972/0x2124 kernel/workqueue.c:3276
[<ffffffff801cc1f4>] process_scheduled_works kernel/workqueue.c:3359 [inline]
[<ffffffff801cc1f4>] worker_thread+0x540/0xcbc kernel/workqueue.c:3440
[<ffffffff801edbe0>] kthread+0x31c/0x444 kernel/kthread.c:436
[<ffffffff80069138>] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:230
[<ffffffff8645a282>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:363