[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.714322] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.378945] random: sshd: uninitialized urandom read (32 bytes read) [ 24.774883] random: sshd: uninitialized urandom read (32 bytes read) [ 25.665690] random: sshd: uninitialized urandom read (32 bytes read) [ 25.820510] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.46' (ECDSA) to the list of known hosts. [ 31.310577] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 31.400962] WARNING: CPU: 0 PID: 4527 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 31.409359] Kernel panic - not syncing: panic_on_warn set ... [ 31.409359] [ 31.416704] CPU: 0 PID: 4527 Comm: syz-executor259 Not tainted 4.18.0-rc5+ #153 [ 31.424125] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.433454] Call Trace: [ 31.436048] dump_stack+0x1c9/0x2b4 [ 31.439660] ? dump_stack_print_info.cold.2+0x52/0x52 [ 31.444848] panic+0x238/0x4e7 [ 31.448031] ? add_taint.cold.5+0x16/0x16 [ 31.452167] ? __warn.cold.8+0x148/0x1ba [ 31.456206] ? __warn.cold.8+0x117/0x1ba [ 31.460249] ? smc_unhash_sk+0x357/0x4b0 [ 31.464292] __warn.cold.8+0x163/0x1ba [ 31.468160] ? smc_unhash_sk+0x357/0x4b0 [ 31.472200] report_bug+0x252/0x2d0 [ 31.475806] do_error_trap+0x1fc/0x4d0 [ 31.479673] ? math_error+0x3e0/0x3e0 [ 31.483456] ? print_usage_bug+0xc0/0xc0 [ 31.487498] ? lock_acquire+0x1e4/0x540 [ 31.491454] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.496279] do_invalid_op+0x1b/0x20 [ 31.499985] invalid_op+0x14/0x20 [ 31.503420] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 31.508060] 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 c9 52 1a fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 b3 31 58 fa [ 31.527223] RSP: 0018:ffff8801d97bf480 EFLAGS: 00010293 [ 31.532565] RAX: ffff8801d95c6740 RBX: ffff8801aca4d0c0 RCX: ffffffff8761b7f6 [ 31.539811] RDX: 0000000000000000 RSI: ffffffff8761b8b7 RDI: 0000000000000005 [ 31.547065] RBP: ffff8801d97bf568 R08: ffff8801d95c6740 R09: ffffed0035949a28 [ 31.554313] R10: ffffed0035949a28 R11: ffff8801aca4d143 R12: 1ffff1003b2f7e94 [ 31.561560] R13: ffff8801d97bf540 R14: ffffffff89937480 R15: ffff8801aca4d140 [ 31.568816] ? smc_unhash_sk+0x296/0x4b0 [ 31.572856] ? smc_unhash_sk+0x357/0x4b0 [ 31.576903] ? smc_rx_data_available+0x120/0x120 [ 31.581637] ? release_sock+0x1ec/0x2c0 [ 31.585592] ? __local_bh_enable_ip+0x161/0x230 [ 31.590241] ? __release_sock+0x3a0/0x3a0 [ 31.594367] ? smc_release+0x2c9/0x670 [ 31.598236] ? trace_hardirqs_on+0xd/0x10 [ 31.602362] ? __local_bh_enable_ip+0x161/0x230 [ 31.607019] smc_release+0x3cf/0x670 [ 31.610725] __sock_release+0xd7/0x260 [ 31.614590] ? __sock_release+0x260/0x260 [ 31.618715] sock_close+0x19/0x20 [ 31.622150] __fput+0x355/0x8b0 [ 31.625410] ? fput+0x1a0/0x1a0 [ 31.628673] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.633149] ____fput+0x15/0x20 [ 31.636410] task_work_run+0x1ec/0x2a0 [ 31.640278] ? task_work_cancel+0x250/0x250 [ 31.644580] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 31.650099] ? switch_task_namespaces+0xa2/0xd0 [ 31.654752] do_exit+0x1b08/0x2750 [ 31.658277] ? mm_update_next_owner+0x9a0/0x9a0 [ 31.662927] ? lock_pin_lock+0x350/0x350 [ 31.666973] ? kasan_check_read+0x11/0x20 [ 31.671100] ? rcu_is_watching+0x8c/0x150 [ 31.675230] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 31.679624] ? check_usage_backwards+0x164/0x3d0 [ 31.684360] ? print_shortest_lock_dependencies+0x80/0x80 [ 31.689878] ? unwind_get_return_address+0x61/0xa0 [ 31.694793] ? graph_lock+0x170/0x170 [ 31.698575] ? graph_lock+0x170/0x170 [ 31.702370] ? find_held_lock+0x36/0x1c0 [ 31.706428] ? lock_downgrade+0x8f0/0x8f0 [ 31.710559] ? kasan_check_read+0x11/0x20 [ 31.714695] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.719097] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.724092] ? release_sock+0x1ec/0x2c0 [ 31.728048] ? trace_hardirqs_on+0xd/0x10 [ 31.732177] ? __local_bh_enable_ip+0x161/0x230 [ 31.736830] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.741220] ? release_sock+0x1ec/0x2c0 [ 31.745188] ? __release_sock+0x3a0/0x3a0 [ 31.749329] ? __local_bh_enable_ip+0x161/0x230 [ 31.753981] ? smc_setsockopt+0x388/0x6e0 [ 31.758114] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.763629] ? __sys_setsockopt+0x257/0x3b0 [ 31.767933] do_group_exit+0x177/0x440 [ 31.771800] ? mm_fault_error+0x380/0x380 [ 31.775927] ? __ia32_sys_exit+0x50/0x50 [ 31.779972] ? do_syscall_64+0x9a/0x820 [ 31.783929] __x64_sys_exit_group+0x3e/0x50 [ 31.788234] do_syscall_64+0x1b9/0x820 [ 31.792112] ? syscall_slow_exit_work+0x500/0x500 [ 31.796935] ? syscall_return_slowpath+0x5e0/0x5e0 [ 31.801855] ? syscall_return_slowpath+0x31d/0x5e0 [ 31.806771] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.812119] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.816945] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.822124] RIP: 0033:0x43ec88 [ 31.825289] Code: Bad RIP value. [ 31.828644] RSP: 002b:00007fff28898cb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 31.836331] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 31.843579] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 31.850827] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 31.858073] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 31.865323] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 31.873197] Dumping ftrace buffer: [ 31.876850] (ftrace buffer empty) [ 31.880544] Kernel Offset: disabled [ 31.884151] Rebooting in 86400 seconds..