[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.190042] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.369947] random: sshd: uninitialized urandom read (32 bytes read) [ 23.701341] random: sshd: uninitialized urandom read (32 bytes read) [ 24.608916] random: sshd: uninitialized urandom read (32 bytes read) [ 24.769995] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.18' (ECDSA) to the list of known hosts. [ 30.304545] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.400424] WARNING: CPU: 0 PID: 4558 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 30.408859] Kernel panic - not syncing: panic_on_warn set ... [ 30.408859] [ 30.416218] CPU: 0 PID: 4558 Comm: syz-executor684 Not tainted 4.18.0-rc5+ #151 [ 30.423656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.432997] Call Trace: [ 30.435592] dump_stack+0x1c9/0x2b4 [ 30.439207] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.444391] panic+0x238/0x4e7 [ 30.447581] ? add_taint.cold.5+0x16/0x16 [ 30.451714] ? __warn.cold.8+0x148/0x1ba [ 30.455770] ? __warn.cold.8+0x117/0x1ba [ 30.459825] ? smc_unhash_sk+0x357/0x4b0 [ 30.463884] __warn.cold.8+0x163/0x1ba [ 30.467770] ? smc_unhash_sk+0x357/0x4b0 [ 30.471824] report_bug+0x252/0x2d0 [ 30.475466] do_error_trap+0x1fc/0x4d0 [ 30.479356] ? math_error+0x3e0/0x3e0 [ 30.483144] ? print_usage_bug+0xc0/0xc0 [ 30.487193] ? lock_acquire+0x1e4/0x540 [ 30.491156] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.495997] do_invalid_op+0x1b/0x20 [ 30.499709] invalid_op+0x14/0x20 [ 30.503161] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 30.507814] 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 [ 30.527008] RSP: 0018:ffff8801d95e7480 EFLAGS: 00010293 [ 30.532375] RAX: ffff8801d9480000 RBX: ffff8801ae0670c0 RCX: ffffffff8761c7f6 [ 30.539635] RDX: 0000000000000000 RSI: ffffffff8761c8b7 RDI: 0000000000000005 [ 30.546906] RBP: ffff8801d95e7568 R08: ffff8801d9480000 R09: ffffed0035c0ce28 [ 30.554165] R10: ffffed0035c0ce28 R11: ffff8801ae067143 R12: 1ffff1003b2bce94 [ 30.561434] R13: ffff8801d95e7540 R14: ffffffff89937640 R15: ffff8801ae067140 [ 30.568723] ? smc_unhash_sk+0x296/0x4b0 [ 30.572783] ? smc_unhash_sk+0x357/0x4b0 [ 30.576838] ? smc_rx_data_available+0x120/0x120 [ 30.581578] ? release_sock+0x1ec/0x2c0 [ 30.585535] ? __local_bh_enable_ip+0x161/0x230 [ 30.590187] ? __release_sock+0x3a0/0x3a0 [ 30.594899] ? smc_release+0x2c9/0x670 [ 30.598780] ? trace_hardirqs_on+0xd/0x10 [ 30.602912] ? __local_bh_enable_ip+0x161/0x230 [ 30.607570] smc_release+0x3cf/0x670 [ 30.611268] __sock_release+0xd7/0x260 [ 30.615139] ? __sock_release+0x260/0x260 [ 30.619269] sock_close+0x19/0x20 [ 30.622706] __fput+0x355/0x8b0 [ 30.625970] ? fput+0x1a0/0x1a0 [ 30.629237] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.633724] ____fput+0x15/0x20 [ 30.636986] task_work_run+0x1ec/0x2a0 [ 30.640855] ? task_work_cancel+0x250/0x250 [ 30.645159] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 30.650679] ? switch_task_namespaces+0xa2/0xd0 [ 30.655341] do_exit+0x1b08/0x2750 [ 30.658864] ? mm_update_next_owner+0x9a0/0x9a0 [ 30.663531] ? lock_pin_lock+0x350/0x350 [ 30.667594] ? kasan_check_read+0x11/0x20 [ 30.671722] ? rcu_is_watching+0x8c/0x150 [ 30.675859] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 30.680267] ? check_usage_backwards+0x164/0x3d0 [ 30.685011] ? print_shortest_lock_dependencies+0x80/0x80 [ 30.690543] ? unwind_get_return_address+0x61/0xa0 [ 30.695454] ? graph_lock+0x170/0x170 [ 30.699238] ? graph_lock+0x170/0x170 [ 30.703041] ? find_held_lock+0x36/0x1c0 [ 30.707096] ? lock_downgrade+0x8f0/0x8f0 [ 30.711234] ? kasan_check_read+0x11/0x20 [ 30.715374] ? do_raw_spin_unlock+0xa7/0x2f0 [ 30.719766] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.724769] ? release_sock+0x1ec/0x2c0 [ 30.728727] ? trace_hardirqs_on+0xd/0x10 [ 30.732856] ? __local_bh_enable_ip+0x161/0x230 [ 30.737527] ? _raw_spin_unlock_bh+0x30/0x40 [ 30.741932] ? release_sock+0x1ec/0x2c0 [ 30.745895] ? __release_sock+0x3a0/0x3a0 [ 30.750049] ? __local_bh_enable_ip+0x161/0x230 [ 30.754716] ? smc_setsockopt+0x388/0x6e0 [ 30.758857] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.764379] ? __sys_setsockopt+0x257/0x3b0 [ 30.768689] do_group_exit+0x177/0x440 [ 30.772569] ? mm_fault_error+0x380/0x380 [ 30.776706] ? __ia32_sys_exit+0x50/0x50 [ 30.780755] ? do_syscall_64+0x9a/0x820 [ 30.784725] __x64_sys_exit_group+0x3e/0x50 [ 30.789041] do_syscall_64+0x1b9/0x820 [ 30.792919] ? syscall_slow_exit_work+0x500/0x500 [ 30.797746] ? syscall_return_slowpath+0x5e0/0x5e0 [ 30.802659] ? syscall_return_slowpath+0x31d/0x5e0 [ 30.807574] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 30.812921] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.817769] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.822969] RIP: 0033:0x43ec88 [ 30.826157] Code: Bad RIP value. [ 30.829532] RSP: 002b:00007fff7d809c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 30.837234] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 30.844484] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 30.851745] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 30.858996] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 30.866253] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 30.874320] Dumping ftrace buffer: [ 30.878000] (ftrace buffer empty) [ 30.881690] Kernel Offset: disabled [ 30.885312] Rebooting in 86400 seconds..