random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) INFO: task syz-executor226:4470 blocked for more than 140 seconds. Not tainted 4.18.0-rc5-next-20180720+ #12 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor226 D24320 4470 4468 0x00000000 Call Trace: context_switch kernel/sched/core.c:2821 [inline] __schedule+0x87c/0x1ea0 kernel/sched/core.c:3469 schedule+0xfb/0x450 kernel/sched/core.c:3513 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1777 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x430/0x8d0 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1544/0x1bb0 crypto/algif_aead.c:334 sock_recvmsg_nosec+0x8c/0xb0 net/socket.c:796 ___sys_recvmsg+0x2b6/0x680 net/socket.c:2269 __sys_recvmmsg+0x301/0xba0 net/socket.c:2381 do_sys_recvmmsg+0x181/0x1a0 net/socket.c:2457 __do_sys_recvmmsg net/socket.c:2475 [inline] __se_sys_recvmmsg net/socket.c:2471 [inline] __x64_sys_recvmmsg+0xbe/0x150 net/socket.c:2471 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440379 Code: Bad RIP value. RSP: 002b:00007ffcad1e64c8 EFLAGS: 00000207 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000440379 RDX: 0000000000000002 RSI: 0000000020003340 RDI: 000000000000000a RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401c00 R13: 0000000000401c90 R14: 0000000000000000 R15: 0000000000000000 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc5-next-20180720+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x10b0 kernel/hung_task.c:265 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.021 msecs NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc5-next-20180720+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_lockdep_rcu_enabled+0x31/0x90 kernel/rcu/update.c:252 Code: 55 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 48 89 e5 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 4c <8b> 15 c9 12 39 08 85 d2 74 3e 48 c7 c7 80 95 2a 89 48 b8 00 00 00 RSP: 0018:ffff8801dae07498 EFLAGS: 00000046 RAX: 0000000000000003 RBX: 1ffff1003b5c0e9a RCX: 00000001000bac6c RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff899f47c0 RBP: ffff8801dae07498 R08: 0000000000000000 R09: dffffc0000000000 R10: ffff8801d9a52d58 R11: 0000000000001b4e R12: ffff8801dae075b0 R13: ffffffff88f928a0 R14: ffff8801dae07780 R15: ffffffff88e75dc0 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001ac8ef000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x706/0xa30 kernel/locking/lockdep.c:3942 rcu_lock_release include/linux/rcupdate.h:249 [inline] rcu_read_unlock include/linux/rcupdate.h:683 [inline] rebalance_domains+0x379/0xd90 kernel/sched/fair.c:8981 _nohz_idle_balance+0x636/0x820 kernel/sched/fair.c:9340 nohz_idle_balance kernel/sched/fair.c:9388 [inline] run_rebalance_domains+0x2c6/0x4c0 kernel/sched/fair.c:9571 __do_softirq+0x2e8/0xb17 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x1d4/0x210 kernel/softirq.c:412 scheduler_ipi+0x53c/0xa50 kernel/sched/core.c:1777 smp_reschedule_interrupt+0xf5/0x670 arch/x86/kernel/smp.c:277 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:891 RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54 Code: c7 48 89 45 d8 e8 7a 3e 1c fa 48 8b 45 d8 e9 d2 fe ff ff 48 89 df e8 69 3e 1c fa eb 8a 90 90 90 90 90 90 90 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90 RSP: 0018:ffffffff88e07bc0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: 1ffffffff11c0f7b RCX: ffffffff8166e182 RDX: 1ffffffff11e3658 RSI: 0000000000000004 RDI: ffffffff88f1b2c0 RBP: ffffffff88e07bc0 R08: ffffed003b5c46d7 R09: ffffed003b5c46d6 R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000000 R13: ffffffff88e07c78 R14: ffffffff899f46e0 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xc7/0x450 arch/x86/kernel/process.c:500 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:491 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3aa/0x570 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 rest_init+0xe1/0xe4 init/main.c:442 start_kernel+0x90e/0x949 init/main.c:738 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:452 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:433 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242