[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.601174] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.895990] random: sshd: uninitialized urandom read (32 bytes read) [ 23.262743] random: sshd: uninitialized urandom read (32 bytes read) [ 24.144636] random: sshd: uninitialized urandom read (32 bytes read) [ 24.299949] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.60' (ECDSA) to the list of known hosts. [ 29.799603] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 29.894574] WARNING: CPU: 1 PID: 4545 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 29.902999] Kernel panic - not syncing: panic_on_warn set ... [ 29.902999] [ 29.910367] CPU: 1 PID: 4545 Comm: syz-executor744 Not tainted 4.18.0-rc4+ #148 [ 29.917801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.927142] Call Trace: [ 29.929722] dump_stack+0x1c9/0x2b4 [ 29.933336] ? dump_stack_print_info.cold.2+0x52/0x52 [ 29.938523] panic+0x238/0x4e7 [ 29.941708] ? add_taint.cold.5+0x16/0x16 [ 29.945845] ? __warn.cold.8+0x148/0x1ba [ 29.949890] ? __warn.cold.8+0x117/0x1ba [ 29.953951] ? smc_unhash_sk+0x357/0x4b0 [ 29.957999] __warn.cold.8+0x163/0x1ba [ 29.961881] ? smc_unhash_sk+0x357/0x4b0 [ 29.965930] report_bug+0x252/0x2d0 [ 29.969545] do_error_trap+0x1fc/0x4d0 [ 29.973418] ? math_error+0x3e0/0x3e0 [ 29.977213] ? print_usage_bug+0xc0/0xc0 [ 29.981273] ? lock_acquire+0x1e4/0x540 [ 29.985239] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.990081] do_invalid_op+0x1b/0x20 [ 29.993781] invalid_op+0x14/0x20 [ 29.997253] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 30.001907] 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 [ 30.021120] RSP: 0018:ffff8801d916f480 EFLAGS: 00010293 [ 30.026471] RAX: ffff8801d95ce580 RBX: ffff8801ac4a10c0 RCX: ffffffff8761c7f6 [ 30.033825] RDX: 0000000000000000 RSI: ffffffff8761c8b7 RDI: 0000000000000005 [ 30.041091] RBP: ffff8801d916f568 R08: ffff8801d95ce580 R09: ffffed0035894228 [ 30.048345] R10: ffffed0035894228 R11: ffff8801ac4a1143 R12: 1ffff1003b22de94 [ 30.055601] R13: ffff8801d916f540 R14: ffffffff899373c0 R15: ffff8801ac4a1140 [ 30.062871] ? smc_unhash_sk+0x296/0x4b0 [ 30.066919] ? smc_unhash_sk+0x357/0x4b0 [ 30.070973] ? smc_rx_data_available+0x120/0x120 [ 30.075716] ? release_sock+0x1ec/0x2c0 [ 30.079678] ? __local_bh_enable_ip+0x161/0x230 [ 30.084329] ? __release_sock+0x3a0/0x3a0 [ 30.088465] ? smc_release+0x2c9/0x670 [ 30.092336] ? trace_hardirqs_on+0xd/0x10 [ 30.096470] ? __local_bh_enable_ip+0x161/0x230 [ 30.101133] smc_release+0x3cf/0x670 [ 30.104834] __sock_release+0xd7/0x260 [ 30.108714] ? __sock_release+0x260/0x260 [ 30.112844] sock_close+0x19/0x20 [ 30.116286] __fput+0x355/0x8b0 [ 30.119550] ? fput+0x1a0/0x1a0 [ 30.122814] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.127294] ____fput+0x15/0x20 [ 30.130560] task_work_run+0x1ec/0x2a0 [ 30.134432] ? task_work_cancel+0x250/0x250 [ 30.138740] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 30.144275] ? switch_task_namespaces+0xa2/0xd0 [ 30.148945] do_exit+0x1b08/0x2750 [ 30.152486] ? mm_update_next_owner+0x9a0/0x9a0 [ 30.157147] ? lock_pin_lock+0x350/0x350 [ 30.161244] ? kasan_check_read+0x11/0x20 [ 30.165377] ? rcu_is_watching+0x8c/0x150 [ 30.169510] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 30.173910] ? check_usage_backwards+0x164/0x3d0 [ 30.178674] ? print_shortest_lock_dependencies+0x80/0x80 [ 30.184209] ? unwind_get_return_address+0x61/0xa0 [ 30.189134] ? graph_lock+0x170/0x170 [ 30.192939] ? graph_lock+0x170/0x170 [ 30.196728] ? find_held_lock+0x36/0x1c0 [ 30.200789] ? lock_downgrade+0x8f0/0x8f0 [ 30.204927] ? kasan_check_read+0x11/0x20 [ 30.209056] ? do_raw_spin_unlock+0xa7/0x2f0 [ 30.213455] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.218458] ? release_sock+0x1ec/0x2c0 [ 30.222415] ? trace_hardirqs_on+0xd/0x10 [ 30.226550] ? __local_bh_enable_ip+0x161/0x230 [ 30.231204] ? _raw_spin_unlock_bh+0x30/0x40 [ 30.235604] ? release_sock+0x1ec/0x2c0 [ 30.239560] ? __release_sock+0x3a0/0x3a0 [ 30.243695] ? __local_bh_enable_ip+0x161/0x230 [ 30.248353] ? smc_setsockopt+0x388/0x6e0 [ 30.252488] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.258011] ? __sys_setsockopt+0x257/0x3b0 [ 30.262332] do_group_exit+0x177/0x440 [ 30.266292] ? mm_fault_error+0x380/0x380 [ 30.270424] ? __ia32_sys_exit+0x50/0x50 [ 30.274470] ? do_syscall_64+0x9a/0x820 [ 30.278430] __x64_sys_exit_group+0x3e/0x50 [ 30.282739] do_syscall_64+0x1b9/0x820 [ 30.286626] ? syscall_return_slowpath+0x5e0/0x5e0 [ 30.291541] ? syscall_return_slowpath+0x31d/0x5e0 [ 30.296473] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 30.301836] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.306670] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.311843] RIP: 0033:0x43ec88 [ 30.315014] Code: Bad RIP value. [ 30.318386] RSP: 002b:00007ffd2ef29c48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 30.326092] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 30.333346] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 30.340600] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 30.347851] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 30.355114] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 30.363149] Dumping ftrace buffer: [ 30.366823] (ftrace buffer empty) [ 30.370514] Kernel Offset: disabled [ 30.374128] Rebooting in 86400 seconds..