[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.911383] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.241483] random: sshd: uninitialized urandom read (32 bytes read) [ 24.631301] random: sshd: uninitialized urandom read (32 bytes read) [ 25.489594] random: sshd: uninitialized urandom read (32 bytes read) [ 25.650716] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. [ 31.183412] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 31.278696] WARNING: CPU: 1 PID: 4561 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 31.287107] Kernel panic - not syncing: panic_on_warn set ... [ 31.287107] [ 31.294471] CPU: 1 PID: 4561 Comm: syz-executor105 Not tainted 4.18.0-rc5+ #151 [ 31.301903] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.311254] Call Trace: [ 31.313837] dump_stack+0x1c9/0x2b4 [ 31.317459] ? dump_stack_print_info.cold.2+0x52/0x52 [ 31.322656] panic+0x238/0x4e7 [ 31.325838] ? add_taint.cold.5+0x16/0x16 [ 31.329988] ? __warn.cold.8+0x148/0x1ba [ 31.334046] ? __warn.cold.8+0x117/0x1ba [ 31.338107] ? smc_unhash_sk+0x357/0x4b0 [ 31.342174] __warn.cold.8+0x163/0x1ba [ 31.346056] ? smc_unhash_sk+0x357/0x4b0 [ 31.350105] report_bug+0x252/0x2d0 [ 31.353718] do_error_trap+0x1fc/0x4d0 [ 31.357598] ? math_error+0x3e0/0x3e0 [ 31.361392] ? print_usage_bug+0xc0/0xc0 [ 31.365455] ? lock_acquire+0x1e4/0x540 [ 31.369430] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.374270] do_invalid_op+0x1b/0x20 [ 31.377975] invalid_op+0x14/0x20 [ 31.381427] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 31.386077] 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 [ 31.405273] RSP: 0018:ffff8801ad81f480 EFLAGS: 00010293 [ 31.410639] RAX: ffff8801ad8ee540 RBX: ffff8801d95a10c0 RCX: ffffffff8761c7f6 [ 31.417897] RDX: 0000000000000000 RSI: ffffffff8761c8b7 RDI: 0000000000000005 [ 31.425180] RBP: ffff8801ad81f568 R08: ffff8801ad8ee540 R09: ffffed003b2b4228 [ 31.432457] R10: ffffed003b2b4228 R11: ffff8801d95a1143 R12: 1ffff10035b03e94 [ 31.439722] R13: ffff8801ad81f540 R14: ffffffff89937640 R15: ffff8801d95a1140 [ 31.447017] ? smc_unhash_sk+0x296/0x4b0 [ 31.451088] ? smc_unhash_sk+0x357/0x4b0 [ 31.455149] ? smc_rx_data_available+0x120/0x120 [ 31.459899] ? release_sock+0x1ec/0x2c0 [ 31.463859] ? __local_bh_enable_ip+0x161/0x230 [ 31.468509] ? __release_sock+0x3a0/0x3a0 [ 31.472646] ? smc_release+0x2c9/0x670 [ 31.476521] ? trace_hardirqs_on+0xd/0x10 [ 31.480653] ? __local_bh_enable_ip+0x161/0x230 [ 31.485316] smc_release+0x3cf/0x670 [ 31.489039] __sock_release+0xd7/0x260 [ 31.492921] ? __sock_release+0x260/0x260 [ 31.497062] sock_close+0x19/0x20 [ 31.500502] __fput+0x355/0x8b0 [ 31.503764] ? fput+0x1a0/0x1a0 [ 31.507290] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.511779] ____fput+0x15/0x20 [ 31.515049] task_work_run+0x1ec/0x2a0 [ 31.518926] ? task_work_cancel+0x250/0x250 [ 31.523246] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 31.528772] ? switch_task_namespaces+0xa2/0xd0 [ 31.533452] do_exit+0x1b08/0x2750 [ 31.536995] ? mm_update_next_owner+0x9a0/0x9a0 [ 31.541681] ? lock_pin_lock+0x350/0x350 [ 31.545740] ? kasan_check_read+0x11/0x20 [ 31.549877] ? rcu_is_watching+0x8c/0x150 [ 31.554021] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 31.558432] ? check_usage_backwards+0x164/0x3d0 [ 31.563177] ? print_shortest_lock_dependencies+0x80/0x80 [ 31.568705] ? unwind_get_return_address+0x61/0xa0 [ 31.573633] ? graph_lock+0x170/0x170 [ 31.577418] ? graph_lock+0x170/0x170 [ 31.581213] ? find_held_lock+0x36/0x1c0 [ 31.585263] ? lock_downgrade+0x8f0/0x8f0 [ 31.589400] ? kasan_check_read+0x11/0x20 [ 31.593533] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.597938] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.602954] ? release_sock+0x1ec/0x2c0 [ 31.606932] ? trace_hardirqs_on+0xd/0x10 [ 31.611065] ? __local_bh_enable_ip+0x161/0x230 [ 31.615722] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.620125] ? release_sock+0x1ec/0x2c0 [ 31.624084] ? __release_sock+0x3a0/0x3a0 [ 31.628219] ? __local_bh_enable_ip+0x161/0x230 [ 31.632880] ? smc_setsockopt+0x388/0x6e0 [ 31.637026] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.642557] ? __sys_setsockopt+0x257/0x3b0 [ 31.646867] do_group_exit+0x177/0x440 [ 31.650919] ? mm_fault_error+0x380/0x380 [ 31.655064] ? __ia32_sys_exit+0x50/0x50 [ 31.659120] ? do_syscall_64+0x9a/0x820 [ 31.663083] __x64_sys_exit_group+0x3e/0x50 [ 31.667392] do_syscall_64+0x1b9/0x820 [ 31.671267] ? syscall_return_slowpath+0x5e0/0x5e0 [ 31.676181] ? syscall_return_slowpath+0x31d/0x5e0 [ 31.681098] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.686454] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.691288] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.696469] RIP: 0033:0x43ec88 [ 31.699652] Code: Bad RIP value. [ 31.703042] RSP: 002b:00007ffcbad309d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 31.710748] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 31.718018] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 31.725300] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 31.732577] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 31.739837] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 31.747878] Dumping ftrace buffer: [ 31.751702] (ftrace buffer empty) [ 31.755427] Kernel Offset: disabled [ 31.759092] Rebooting in 86400 seconds..