[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.015340] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.993451] random: sshd: uninitialized urandom read (32 bytes read) [ 24.338531] random: sshd: uninitialized urandom read (32 bytes read) [ 25.025679] random: sshd: uninitialized urandom read (32 bytes read) [ 29.336642] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.11' (ECDSA) to the list of known hosts. [ 34.858014] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/28 17:17:49 parsed 1 programs 2018/04/28 17:17:49 executed programs: 0 [ 35.379448] IPVS: ftp: loaded support on port[0] = 21 [ 35.430615] WARNING: CPU: 0 PID: 4553 at include/net/sock.h:639 smc_unhash_sk+0x345/0x4a0 [ 35.439113] Kernel panic - not syncing: panic_on_warn set ... [ 35.439113] [ 35.446471] CPU: 0 PID: 4553 Comm: syz-executor0 Not tainted 4.17.0-rc2+ #46 [ 35.453729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.463159] Call Trace: [ 35.465733] dump_stack+0x1b9/0x294 [ 35.469340] ? dump_stack_print_info.cold.2+0x52/0x52 [ 35.474517] ? smc_unhash_sk+0x250/0x4a0 [ 35.478562] panic+0x22f/0x4de [ 35.481737] ? add_taint.cold.5+0x16/0x16 [ 35.485875] ? __warn.cold.8+0x148/0x1b3 [ 35.489916] ? __warn.cold.8+0x117/0x1b3 [ 35.493961] ? smc_unhash_sk+0x345/0x4a0 [ 35.498006] __warn.cold.8+0x163/0x1b3 [ 35.501887] ? smc_unhash_sk+0x345/0x4a0 [ 35.505938] report_bug+0x252/0x2d0 [ 35.509549] do_error_trap+0x1de/0x490 [ 35.513418] ? math_error+0x420/0x420 [ 35.517206] ? lock_acquire+0x1dc/0x520 [ 35.521167] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.525992] do_invalid_op+0x1b/0x20 [ 35.529692] invalid_op+0x14/0x20 [ 35.533126] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 35.537773] RSP: 0018:ffff8801adacefe0 EFLAGS: 00010293 [ 35.543119] RAX: ffff8801ad032100 RBX: ffff8801a92e07c0 RCX: ffffffff873e793e [ 35.550372] RDX: 0000000000000000 RSI: ffffffff873e79f5 RDI: 0000000000000005 [ 35.557624] RBP: ffff8801adacf0c8 R08: ffff8801ad032100 R09: ffffed003525c108 [ 35.564876] R10: ffffed003525c108 R11: ffff8801a92e0843 R12: 1ffff10035b59e00 [ 35.572131] R13: ffff8801adacf0a0 R14: ffffffff8970b440 R15: ffff8801a92e0840 [ 35.579410] ? smc_unhash_sk+0x28e/0x4a0 [ 35.583457] ? smc_unhash_sk+0x345/0x4a0 [ 35.587505] ? smc_hash_sk+0x2f0/0x2f0 [ 35.591376] ? release_sock+0x1e2/0x2b0 [ 35.595339] ? __local_bh_enable_ip+0x161/0x230 [ 35.599999] ? __release_sock+0x3a0/0x3a0 [ 35.604139] ? smc_release+0x269/0x610 [ 35.608013] ? trace_hardirqs_on+0xd/0x10 [ 35.612149] ? __local_bh_enable_ip+0x161/0x230 [ 35.616817] smc_release+0x36e/0x610 [ 35.620524] sock_release+0x96/0x1b0 [ 35.624224] ? sock_alloc_file+0x4e0/0x4e0 [ 35.628439] sock_close+0x16/0x20 [ 35.631878] __fput+0x34d/0x890 [ 35.635145] ? fput+0x1a0/0x1a0 [ 35.638411] ? _raw_spin_unlock_irq+0x27/0x70 [ 35.642888] ____fput+0x15/0x20 [ 35.646152] task_work_run+0x1e4/0x290 [ 35.650037] ? task_work_cancel+0x240/0x240 [ 35.654345] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 35.659875] ? switch_task_namespaces+0xa2/0xd0 [ 35.664540] do_exit+0x1aee/0x2730 [ 35.668072] ? mm_update_next_owner+0x980/0x980 [ 35.672722] ? print_usage_bug+0xc0/0xc0 [ 35.676776] ? lock_downgrade+0x8e0/0x8e0 [ 35.680905] ? lock_downgrade+0x8e0/0x8e0 [ 35.685063] ? kasan_check_read+0x11/0x20 [ 35.689200] ? do_raw_spin_unlock+0x9e/0x2e0 [ 35.693597] ? __lock_acquire+0x7f5/0x5140 [ 35.697817] ? refcount_inc_not_zero+0x2d0/0x2d0 [ 35.702570] ? _raw_spin_unlock_bh+0x30/0x40 [ 35.707056] ? debug_check_no_locks_freed+0x310/0x310 [ 35.712232] ? smc_poll+0x294/0xcf0 [ 35.715850] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.721370] ? __fget_light+0x2ef/0x430 [ 35.725344] ? fget_raw+0x20/0x20 [ 35.728787] ? __check_object_size+0x95/0x5d9 [ 35.733271] ? graph_lock+0x170/0x170 [ 35.737056] ? sock_poll+0x2be/0x390 [ 35.740754] ? sock_ioctl+0x680/0x680 [ 35.744541] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.750067] ? memset+0x31/0x40 [ 35.753333] ? find_held_lock+0x36/0x1c0 [ 35.757377] ? lock_downgrade+0x8e0/0x8e0 [ 35.761510] do_group_exit+0x16f/0x430 [ 35.765381] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 35.769948] ? __ia32_sys_exit+0x50/0x50 [ 35.773993] ? _raw_spin_unlock_irq+0x27/0x70 [ 35.778492] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.783492] get_signal+0x886/0x1960 [ 35.787197] ? ptrace_notify+0x130/0x130 [ 35.791244] ? lock_downgrade+0x8e0/0x8e0 [ 35.795382] ? lock_downgrade+0x8e0/0x8e0 [ 35.799514] ? kasan_check_read+0x11/0x20 [ 35.803650] ? release_sock+0x1e2/0x2b0 [ 35.807606] ? trace_hardirqs_on+0xd/0x10 [ 35.811742] ? __local_bh_enable_ip+0x161/0x230 [ 35.816394] do_signal+0x98/0x2040 [ 35.819932] ? __release_sock+0x3a0/0x3a0 [ 35.824064] ? setup_sigcontext+0x7d0/0x7d0 [ 35.828371] ? smc_connect+0xaf/0x260 [ 35.832157] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.837675] ? __sys_connect+0x1d1/0x4c0 [ 35.841720] ? __ia32_sys_accept+0xb0/0xb0 [ 35.845947] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 35.851476] ? exit_to_usermode_loop+0x87/0x310 [ 35.856135] exit_to_usermode_loop+0x28a/0x310 [ 35.860701] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 35.865523] ? do_fast_syscall_32+0x148/0xf9b [ 35.870010] do_fast_syscall_32+0xcc3/0xf9b [ 35.874336] ? do_int80_syscall_32+0x880/0x880 [ 35.878934] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 35.883696] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.889229] ? syscall_return_slowpath+0x30f/0x5c0 [ 35.894244] ? sysret32_from_system_call+0x5/0x46 [ 35.899074] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.903900] entry_SYSENTER_compat+0x70/0x7f [ 35.908296] RIP: 0023:0xf7f6fcb9 [ 35.911637] RSP: 002b:00000000ff9ea5dc EFLAGS: 00000282 ORIG_RAX: 00000000000000a8 [ 35.919326] RAX: 0000000000000001 RBX: 0000000020000100 RCX: 0000000000000001 [ 35.926583] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 35.933832] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 35.941079] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 35.948328] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.956294] Dumping ftrace buffer: [ 35.959975] (ftrace buffer empty) [ 35.963667] Kernel Offset: disabled [ 35.967283] Rebooting in 86400 seconds..