[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.958867] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.550414] random: sshd: uninitialized urandom read (32 bytes read) [ 21.912798] random: sshd: uninitialized urandom read (32 bytes read) [ 22.617879] random: sshd: uninitialized urandom read (32 bytes read) [ 22.771794] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.53' (ECDSA) to the list of known hosts. [ 28.308855] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 28.398799] WARNING: CPU: 1 PID: 4486 at include/net/sock.h:639 smc_unhash_sk+0x345/0x4a0 [ 28.407196] Kernel panic - not syncing: panic_on_warn set ... [ 28.407196] [ 28.414544] CPU: 1 PID: 4486 Comm: syz-executor033 Not tainted 4.17.0-rc2+ #25 [ 28.421877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.431212] Call Trace: [ 28.433791] dump_stack+0x1b9/0x294 [ 28.437399] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.442571] ? smc_unhash_sk+0x320/0x4a0 [ 28.446610] panic+0x22f/0x4de [ 28.449781] ? add_taint.cold.5+0x16/0x16 [ 28.453910] ? __warn.cold.8+0x148/0x1b3 [ 28.457948] ? __warn.cold.8+0x117/0x1b3 [ 28.461988] ? smc_unhash_sk+0x345/0x4a0 [ 28.466037] __warn.cold.8+0x163/0x1b3 [ 28.469904] ? smc_unhash_sk+0x345/0x4a0 [ 28.473946] report_bug+0x252/0x2d0 [ 28.477553] do_error_trap+0x1de/0x490 [ 28.481420] ? graph_lock+0x170/0x170 [ 28.485201] ? math_error+0x420/0x420 [ 28.488984] ? lock_acquire+0x1dc/0x520 [ 28.492942] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.497773] do_invalid_op+0x1b/0x20 [ 28.501483] invalid_op+0x14/0x20 [ 28.504917] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 28.509561] RSP: 0018:ffff8801b0617488 EFLAGS: 00010293 [ 28.514916] RAX: ffff8801d97c6500 RBX: ffff8801ad62d7c0 RCX: ffffffff873f926e [ 28.522167] RDX: 0000000000000000 RSI: ffffffff873f9325 RDI: 0000000000000005 [ 28.529416] RBP: ffff8801b0617570 R08: ffff8801d97c6500 R09: ffffed0035ac5b08 [ 28.536663] R10: ffffed0035ac5b08 R11: ffff8801ad62d843 R12: 1ffff100360c2e95 [ 28.543910] R13: ffff8801b0617548 R14: ffffffff8970dea0 R15: ffff8801ad62d840 [ 28.551166] ? smc_unhash_sk+0x28e/0x4a0 [ 28.555206] ? smc_unhash_sk+0x345/0x4a0 [ 28.559257] ? smc_unhash_sk+0x345/0x4a0 [ 28.563309] ? smc_hash_sk+0x2f0/0x2f0 [ 28.567176] ? release_sock+0x1e2/0x2b0 [ 28.571132] ? __local_bh_enable_ip+0x161/0x230 [ 28.575780] ? __release_sock+0x3a0/0x3a0 [ 28.579907] ? smc_release+0x269/0x610 [ 28.583773] ? trace_hardirqs_on+0xd/0x10 [ 28.587902] ? __local_bh_enable_ip+0x161/0x230 [ 28.592551] smc_release+0x36e/0x610 [ 28.596247] sock_release+0x96/0x1b0 [ 28.599943] ? sock_alloc_file+0x4e0/0x4e0 [ 28.604159] sock_close+0x16/0x20 [ 28.607594] __fput+0x34d/0x890 [ 28.610854] ? fput+0x1a0/0x1a0 [ 28.614115] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.618593] ____fput+0x15/0x20 [ 28.621854] task_work_run+0x1e4/0x290 [ 28.625723] ? task_work_cancel+0x240/0x240 [ 28.630511] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 28.636039] ? switch_task_namespaces+0xa2/0xd0 [ 28.640691] do_exit+0x1aee/0x2730 [ 28.644215] ? mm_update_next_owner+0x980/0x980 [ 28.648865] ? lock_downgrade+0x8e0/0x8e0 [ 28.652991] ? noop_count+0x40/0x40 [ 28.656602] ? lock_pin_lock+0x350/0x350 [ 28.660643] ? kasan_check_read+0x11/0x20 [ 28.664784] ? rcu_is_watching+0x85/0x140 [ 28.668913] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 28.674084] ? is_bpf_text_address+0xd7/0x170 [ 28.678559] ? check_usage_backwards+0x151/0x3a0 [ 28.683305] ? graph_lock+0x170/0x170 [ 28.687091] ? graph_lock+0x170/0x170 [ 28.690884] ? find_held_lock+0x36/0x1c0 [ 28.694931] ? lock_downgrade+0x8e0/0x8e0 [ 28.699068] ? kasan_check_read+0x11/0x20 [ 28.703202] ? do_raw_spin_unlock+0x9e/0x2e0 [ 28.707594] ? __local_bh_enable_ip+0x161/0x230 [ 28.712241] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.717235] ? release_sock+0x1e2/0x2b0 [ 28.721187] ? trace_hardirqs_on+0xd/0x10 [ 28.725313] ? __local_bh_enable_ip+0x161/0x230 [ 28.729962] ? _raw_spin_unlock_bh+0x30/0x40 [ 28.734351] ? release_sock+0x1e2/0x2b0 [ 28.738304] ? __release_sock+0x3a0/0x3a0 [ 28.742430] ? __local_bh_enable_ip+0x161/0x230 [ 28.747081] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 28.752251] ? smc_setsockopt+0x1ed/0x630 [ 28.756383] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.761898] ? __sys_setsockopt+0x24f/0x390 [ 28.766203] do_group_exit+0x16f/0x430 [ 28.770076] ? mm_fault_error+0x380/0x380 [ 28.774204] ? __ia32_sys_exit+0x50/0x50 [ 28.778248] ? do_syscall_64+0x92/0x800 [ 28.782207] __x64_sys_exit_group+0x3e/0x50 [ 28.786509] do_syscall_64+0x1b1/0x800 [ 28.790378] ? syscall_return_slowpath+0x5c0/0x5c0 [ 28.795295] ? syscall_return_slowpath+0x30f/0x5c0 [ 28.800210] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 28.805558] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.810390] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.815565] RIP: 0033:0x43e8d8 [ 28.818741] RSP: 002b:00007ffdefde0ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.826427] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 28.833678] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 28.840930] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 28.848186] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 28.855439] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 28.863299] Dumping ftrace buffer: [ 28.866921] (ftrace buffer empty) [ 28.870612] Kernel Offset: disabled [ 28.874227] Rebooting in 86400 seconds..