[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.743317] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.954320] random: sshd: uninitialized urandom read (32 bytes read) [ 24.366317] random: sshd: uninitialized urandom read (32 bytes read) [ 25.196800] random: sshd: uninitialized urandom read (32 bytes read) [ 25.358314] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.46' (ECDSA) to the list of known hosts. [ 30.939774] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 31.032024] WARNING: CPU: 1 PID: 4580 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 31.040436] Kernel panic - not syncing: panic_on_warn set ... [ 31.040436] [ 31.047789] CPU: 1 PID: 4580 Comm: syz-executor385 Not tainted 4.18.0-rc1+ #109 [ 31.055229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.064564] Call Trace: [ 31.067141] dump_stack+0x1c9/0x2b4 [ 31.070764] ? dump_stack_print_info.cold.2+0x52/0x52 [ 31.075948] panic+0x238/0x4e7 [ 31.079146] ? add_taint.cold.5+0x16/0x16 [ 31.083279] ? __warn.cold.8+0x148/0x1ba [ 31.087321] ? __warn.cold.8+0x117/0x1ba [ 31.091364] ? smc_unhash_sk+0x357/0x4b0 [ 31.095420] __warn.cold.8+0x163/0x1ba [ 31.099296] ? smc_unhash_sk+0x357/0x4b0 [ 31.103344] report_bug+0x252/0x2d0 [ 31.106955] do_error_trap+0x1fc/0x4d0 [ 31.110823] ? math_error+0x3f0/0x3f0 [ 31.114609] ? print_usage_bug+0xc0/0xc0 [ 31.118663] ? lock_acquire+0x1e4/0x540 [ 31.122658] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.127489] do_invalid_op+0x1b/0x20 [ 31.131211] invalid_op+0x14/0x20 [ 31.134649] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 31.139305] 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 69 d9 1b fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 43 a4 59 fa [ 31.158483] RSP: 0018:ffff8801a8507480 EFLAGS: 00010293 [ 31.163845] RAX: ffff8801aeca25c0 RBX: ffff8801d90da800 RCX: ffffffff875fd076 [ 31.171100] RDX: 0000000000000000 RSI: ffffffff875fd137 RDI: 0000000000000005 [ 31.178352] RBP: ffff8801a8507568 R08: ffff8801aeca25c0 R09: ffffed003b21b510 [ 31.185603] R10: ffffed003b21b510 R11: ffff8801d90da883 R12: 1ffff100350a0e94 [ 31.192857] R13: ffff8801a8507540 R14: ffffffff89934600 R15: ffff8801d90da880 [ 31.200129] ? smc_unhash_sk+0x296/0x4b0 [ 31.204175] ? smc_unhash_sk+0x357/0x4b0 [ 31.208231] ? smc_rx_data_available+0x120/0x120 [ 31.212973] ? release_sock+0x1ec/0x2c0 [ 31.216946] ? __local_bh_enable_ip+0x161/0x230 [ 31.221599] ? __release_sock+0x3a0/0x3a0 [ 31.225740] ? smc_release+0x269/0x610 [ 31.229619] ? trace_hardirqs_on+0xd/0x10 [ 31.233760] ? __local_bh_enable_ip+0x161/0x230 [ 31.238417] smc_release+0x36e/0x610 [ 31.242125] __sock_release+0xd7/0x260 [ 31.246001] ? __sock_release+0x260/0x260 [ 31.250137] sock_close+0x19/0x20 [ 31.253575] __fput+0x35b/0x8b0 [ 31.256836] ? fput+0x1a0/0x1a0 [ 31.260106] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.264601] ____fput+0x15/0x20 [ 31.267867] task_work_run+0x1ec/0x2a0 [ 31.271747] ? task_work_cancel+0x250/0x250 [ 31.276055] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 31.281580] ? switch_task_namespaces+0xa2/0xd0 [ 31.286242] do_exit+0x1b08/0x2750 [ 31.289778] ? mm_update_next_owner+0x9a0/0x9a0 [ 31.294438] ? lock_pin_lock+0x350/0x350 [ 31.298490] ? kasan_check_read+0x11/0x20 [ 31.302626] ? rcu_is_watching+0x8c/0x150 [ 31.306766] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 31.311169] ? check_usage_backwards+0x164/0x3d0 [ 31.315916] ? print_shortest_lock_dependencies+0x80/0x80 [ 31.321452] ? unwind_get_return_address+0x61/0xa0 [ 31.326370] ? graph_lock+0x170/0x170 [ 31.330162] ? graph_lock+0x170/0x170 [ 31.333950] ? find_held_lock+0x36/0x1c0 [ 31.338004] ? lock_downgrade+0x8f0/0x8f0 [ 31.342146] ? kasan_check_read+0x11/0x20 [ 31.346276] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.350668] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.355680] ? release_sock+0x1ec/0x2c0 [ 31.359639] ? trace_hardirqs_on+0xd/0x10 [ 31.363770] ? __local_bh_enable_ip+0x161/0x230 [ 31.368428] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.372819] ? release_sock+0x1ec/0x2c0 [ 31.376775] ? __release_sock+0x3a0/0x3a0 [ 31.380905] ? __local_bh_enable_ip+0x161/0x230 [ 31.385561] ? smc_setsockopt+0x388/0x6e0 [ 31.389706] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.395245] ? __sys_setsockopt+0x257/0x3b0 [ 31.399559] do_group_exit+0x177/0x440 [ 31.403429] ? mm_fault_error+0x380/0x380 [ 31.407563] ? __ia32_sys_exit+0x50/0x50 [ 31.411614] ? do_syscall_64+0x9a/0x820 [ 31.415572] __x64_sys_exit_group+0x3e/0x50 [ 31.419898] do_syscall_64+0x1b9/0x820 [ 31.423768] ? syscall_slow_exit_work+0x500/0x500 [ 31.428596] ? syscall_return_slowpath+0x5e0/0x5e0 [ 31.433509] ? syscall_return_slowpath+0x31d/0x5e0 [ 31.438433] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.443792] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.448619] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.453791] RIP: 0033:0x43e8d8 [ 31.456962] Code: Bad RIP value. [ 31.460341] RSP: 002b:00007fff50bb2878 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 31.468044] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 31.475296] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 31.482548] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 31.489799] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 31.497054] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 31.505072] Dumping ftrace buffer: [ 31.508723] (ftrace buffer empty) [ 31.512411] Kernel Offset: disabled [ 31.516031] Rebooting in 86400 seconds..