[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.004248] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.764944] random: sshd: uninitialized urandom read (32 bytes read) [ 20.050925] random: sshd: uninitialized urandom read (32 bytes read) [ 20.928170] random: sshd: uninitialized urandom read (32 bytes read) [ 21.085549] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.54' (ECDSA) to the list of known hosts. [ 26.726747] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.826159] WARNING: CPU: 1 PID: 4494 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 26.834551] Kernel panic - not syncing: panic_on_warn set ... [ 26.834551] [ 26.841897] CPU: 1 PID: 4494 Comm: syz-executor813 Not tainted 4.18.0-rc5+ #149 [ 26.849320] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.858650] Call Trace: [ 26.861229] dump_stack+0x1c9/0x2b4 [ 26.864839] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.870039] panic+0x238/0x4e7 [ 26.873224] ? add_taint.cold.5+0x16/0x16 [ 26.877354] ? __warn.cold.8+0x148/0x1ba [ 26.881394] ? __warn.cold.8+0x117/0x1ba [ 26.885444] ? smc_unhash_sk+0x357/0x4b0 [ 26.889488] __warn.cold.8+0x163/0x1ba [ 26.893355] ? smc_unhash_sk+0x357/0x4b0 [ 26.897398] report_bug+0x252/0x2d0 [ 26.901008] do_error_trap+0x1fc/0x4d0 [ 26.904884] ? math_error+0x3e0/0x3e0 [ 26.908686] ? print_usage_bug+0xc0/0xc0 [ 26.912736] ? lock_acquire+0x1e4/0x540 [ 26.916692] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.921517] do_invalid_op+0x1b/0x20 [ 26.925212] invalid_op+0x14/0x20 [ 26.928645] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 26.933289] Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 88 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 89 42 1a fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 73 21 58 fa [ 26.952458] RSP: 0018:ffff8801c1d37480 EFLAGS: 00010293 [ 26.957811] RAX: ffff8801b1ef80c0 RBX: ffff8801b1e0f0c0 RCX: ffffffff8761c7f6 [ 26.965065] RDX: 0000000000000000 RSI: ffffffff8761c8b7 RDI: 0000000000000005 [ 26.972318] RBP: ffff8801c1d37568 R08: ffff8801b1ef80c0 R09: ffffed00363c1e28 [ 26.979571] R10: ffffed00363c1e28 R11: ffff8801b1e0f143 R12: 1ffff100383a6e94 [ 26.986820] R13: ffff8801c1d37540 R14: ffffffff899373c0 R15: ffff8801b1e0f140 [ 26.994084] ? smc_unhash_sk+0x296/0x4b0 [ 26.998124] ? smc_unhash_sk+0x357/0x4b0 [ 27.002171] ? smc_rx_data_available+0x120/0x120 [ 27.006907] ? release_sock+0x1ec/0x2c0 [ 27.010862] ? __local_bh_enable_ip+0x161/0x230 [ 27.015508] ? __release_sock+0x3a0/0x3a0 [ 27.019636] ? smc_release+0x2c9/0x670 [ 27.023520] ? trace_hardirqs_on+0xd/0x10 [ 27.027653] ? __local_bh_enable_ip+0x161/0x230 [ 27.032306] smc_release+0x3cf/0x670 [ 27.036017] __sock_release+0xd7/0x260 [ 27.039890] ? __sock_release+0x260/0x260 [ 27.044023] sock_close+0x19/0x20 [ 27.047462] __fput+0x355/0x8b0 [ 27.050723] ? fput+0x1a0/0x1a0 [ 27.053984] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.058464] ____fput+0x15/0x20 [ 27.061723] task_work_run+0x1ec/0x2a0 [ 27.065602] ? task_work_cancel+0x250/0x250 [ 27.069905] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.075420] ? switch_task_namespaces+0xa2/0xd0 [ 27.080073] do_exit+0x1b08/0x2750 [ 27.083596] ? mm_update_next_owner+0x9a0/0x9a0 [ 27.088249] ? lock_pin_lock+0x350/0x350 [ 27.092294] ? kasan_check_read+0x11/0x20 [ 27.096422] ? rcu_is_watching+0x8c/0x150 [ 27.100555] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 27.104973] ? check_usage_backwards+0x164/0x3d0 [ 27.109720] ? print_shortest_lock_dependencies+0x80/0x80 [ 27.115236] ? unwind_get_return_address+0x61/0xa0 [ 27.120145] ? graph_lock+0x170/0x170 [ 27.123924] ? graph_lock+0x170/0x170 [ 27.127717] ? find_held_lock+0x36/0x1c0 [ 27.131763] ? lock_downgrade+0x8f0/0x8f0 [ 27.135894] ? kasan_check_read+0x11/0x20 [ 27.140029] ? do_raw_spin_unlock+0xa7/0x2f0 [ 27.144425] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.149418] ? release_sock+0x1ec/0x2c0 [ 27.153371] ? trace_hardirqs_on+0xd/0x10 [ 27.157497] ? __local_bh_enable_ip+0x161/0x230 [ 27.162146] ? _raw_spin_unlock_bh+0x30/0x40 [ 27.166532] ? release_sock+0x1ec/0x2c0 [ 27.170496] ? __release_sock+0x3a0/0x3a0 [ 27.174623] ? __local_bh_enable_ip+0x161/0x230 [ 27.179280] ? smc_setsockopt+0x388/0x6e0 [ 27.183408] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.188934] ? __sys_setsockopt+0x257/0x3b0 [ 27.193241] do_group_exit+0x177/0x440 [ 27.197108] ? mm_fault_error+0x380/0x380 [ 27.201235] ? __ia32_sys_exit+0x50/0x50 [ 27.205277] ? do_syscall_64+0x9a/0x820 [ 27.209232] __x64_sys_exit_group+0x3e/0x50 [ 27.213535] do_syscall_64+0x1b9/0x820 [ 27.217403] ? syscall_return_slowpath+0x5e0/0x5e0 [ 27.222314] ? syscall_return_slowpath+0x31d/0x5e0 [ 27.227227] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.232571] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.237395] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.242562] RIP: 0033:0x43ec88 [ 27.245726] Code: Bad RIP value. [ 27.249079] RSP: 002b:00007ffce77a82c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.256764] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 27.264015] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 27.271272] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 27.278517] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 27.285765] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 27.293592] Dumping ftrace buffer: [ 27.297233] (ftrace buffer empty) [ 27.300921] Kernel Offset: disabled [ 27.304529] Rebooting in 86400 seconds..