[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.327730] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.707158] random: sshd: uninitialized urandom read (32 bytes read) [ 24.016863] random: sshd: uninitialized urandom read (32 bytes read) [ 24.859215] random: sshd: uninitialized urandom read (32 bytes read) [ 25.016247] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.60' (ECDSA) to the list of known hosts. [ 30.604327] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.696677] WARNING: CPU: 0 PID: 4556 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 30.705084] Kernel panic - not syncing: panic_on_warn set ... [ 30.705084] [ 30.712436] CPU: 0 PID: 4556 Comm: syz-executor051 Not tainted 4.18.0-rc4+ #145 [ 30.719859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.729192] Call Trace: [ 30.731767] dump_stack+0x1c9/0x2b4 [ 30.735379] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.740561] panic+0x238/0x4e7 [ 30.743735] ? add_taint.cold.5+0x16/0x16 [ 30.747865] ? __warn.cold.8+0x148/0x1ba [ 30.751907] ? __warn.cold.8+0x117/0x1ba [ 30.755951] ? smc_unhash_sk+0x357/0x4b0 [ 30.759991] __warn.cold.8+0x163/0x1ba [ 30.763865] ? smc_unhash_sk+0x357/0x4b0 [ 30.767909] report_bug+0x252/0x2d0 [ 30.771521] do_error_trap+0x1fc/0x4d0 [ 30.775392] ? math_error+0x3e0/0x3e0 [ 30.779177] ? print_usage_bug+0xc0/0xc0 [ 30.783218] ? lock_acquire+0x1e4/0x540 [ 30.787199] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.792041] do_invalid_op+0x1b/0x20 [ 30.795739] invalid_op+0x14/0x20 [ 30.799178] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 30.803818] 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 e9 52 1a fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 b3 2c 58 fa [ 30.823045] RSP: 0018:ffff8801ac71f480 EFLAGS: 00010293 [ 30.828392] RAX: ffff8801ac54a4c0 RBX: ffff8801d90fb0c0 RCX: ffffffff8761b7f6 [ 30.835646] RDX: 0000000000000000 RSI: ffffffff8761b8b7 RDI: 0000000000000005 [ 30.842896] RBP: ffff8801ac71f568 R08: ffff8801ac54a4c0 R09: ffffed003b21f628 [ 30.850143] R10: ffffed003b21f628 R11: ffff8801d90fb143 R12: 1ffff100358e3e94 [ 30.857396] R13: ffff8801ac71f540 R14: ffffffff89937340 R15: ffff8801d90fb140 [ 30.864668] ? smc_unhash_sk+0x296/0x4b0 [ 30.868712] ? smc_unhash_sk+0x357/0x4b0 [ 30.872760] ? smc_rx_data_available+0x120/0x120 [ 30.877499] ? release_sock+0x1ec/0x2c0 [ 30.881462] ? __local_bh_enable_ip+0x161/0x230 [ 30.886116] ? __release_sock+0x3a0/0x3a0 [ 30.890244] ? smc_release+0x2c9/0x670 [ 30.894113] ? trace_hardirqs_on+0xd/0x10 [ 30.898256] ? __local_bh_enable_ip+0x161/0x230 [ 30.902909] smc_release+0x3cf/0x670 [ 30.906606] __sock_release+0xd7/0x260 [ 30.910477] ? __sock_release+0x260/0x260 [ 30.914608] sock_close+0x19/0x20 [ 30.918058] __fput+0x355/0x8b0 [ 30.921331] ? fput+0x1a0/0x1a0 [ 30.924598] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.929075] ____fput+0x15/0x20 [ 30.932352] task_work_run+0x1ec/0x2a0 [ 30.936224] ? task_work_cancel+0x250/0x250 [ 30.940532] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 30.946061] ? switch_task_namespaces+0xa2/0xd0 [ 30.950714] do_exit+0x1b08/0x2750 [ 30.954246] ? mm_update_next_owner+0x9a0/0x9a0 [ 30.958900] ? lock_pin_lock+0x350/0x350 [ 30.962947] ? kasan_check_read+0x11/0x20 [ 30.967073] ? rcu_is_watching+0x8c/0x150 [ 30.971208] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 30.975617] ? check_usage_backwards+0x164/0x3d0 [ 30.980369] ? print_shortest_lock_dependencies+0x80/0x80 [ 30.985890] ? unwind_get_return_address+0x61/0xa0 [ 30.990800] ? graph_lock+0x170/0x170 [ 30.994593] ? graph_lock+0x170/0x170 [ 30.998382] ? find_held_lock+0x36/0x1c0 [ 31.002430] ? lock_downgrade+0x8f0/0x8f0 [ 31.006561] ? kasan_check_read+0x11/0x20 [ 31.010688] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.015080] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.020084] ? release_sock+0x1ec/0x2c0 [ 31.024045] ? trace_hardirqs_on+0xd/0x10 [ 31.028175] ? __local_bh_enable_ip+0x161/0x230 [ 31.032825] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.037214] ? release_sock+0x1ec/0x2c0 [ 31.041170] ? __release_sock+0x3a0/0x3a0 [ 31.045301] ? __local_bh_enable_ip+0x161/0x230 [ 31.049958] ? smc_setsockopt+0x388/0x6e0 [ 31.054091] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.059609] ? __sys_setsockopt+0x257/0x3b0 [ 31.063919] do_group_exit+0x177/0x440 [ 31.067792] ? mm_fault_error+0x380/0x380 [ 31.071921] ? __ia32_sys_exit+0x50/0x50 [ 31.075967] ? do_syscall_64+0x9a/0x820 [ 31.079928] __x64_sys_exit_group+0x3e/0x50 [ 31.084237] do_syscall_64+0x1b9/0x820 [ 31.088106] ? syscall_return_slowpath+0x5e0/0x5e0 [ 31.093024] ? syscall_return_slowpath+0x31d/0x5e0 [ 31.097953] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.103313] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.108148] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.113316] RIP: 0033:0x43ec88 [ 31.116482] Code: Bad RIP value. [ 31.119835] RSP: 002b:00007ffc9526b3c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 31.127523] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 31.134770] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 31.142027] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 31.149282] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 31.156529] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 31.164472] Dumping ftrace buffer: [ 31.168134] (ftrace buffer empty) [ 31.171825] Kernel Offset: disabled [ 31.175434] Rebooting in 86400 seconds..