[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.155447] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.873908] random: sshd: uninitialized urandom read (32 bytes read) [ 20.202853] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.104789] random: sshd: uninitialized urandom read (32 bytes read) [ 25.030173] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts. [ 30.528379] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.628138] WARNING: CPU: 1 PID: 4577 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 30.636747] Kernel panic - not syncing: panic_on_warn set ... [ 30.636747] [ 30.644134] CPU: 1 PID: 4577 Comm: syz-executor457 Not tainted 4.18.0-rc4+ #142 [ 30.651567] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.660906] Call Trace: [ 30.663488] dump_stack+0x1c9/0x2b4 [ 30.667101] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.672281] panic+0x238/0x4e7 [ 30.675454] ? add_taint.cold.5+0x16/0x16 [ 30.679586] ? __warn.cold.8+0x148/0x1ba [ 30.683630] ? __warn.cold.8+0x117/0x1ba [ 30.687688] ? smc_unhash_sk+0x357/0x4b0 [ 30.691731] __warn.cold.8+0x163/0x1ba [ 30.695607] ? smc_unhash_sk+0x357/0x4b0 [ 30.699653] report_bug+0x252/0x2d0 [ 30.703264] do_error_trap+0x1fc/0x4d0 [ 30.707147] ? math_error+0x3e0/0x3e0 [ 30.710949] ? print_usage_bug+0xc0/0xc0 [ 30.715001] ? lock_acquire+0x1e4/0x540 [ 30.718988] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.723815] do_invalid_op+0x1b/0x20 [ 30.727525] invalid_op+0x14/0x20 [ 30.730967] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 30.735623] 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 03 2d 58 fa [ 30.754818] RSP: 0018:ffff8801abdaf480 EFLAGS: 00010293 [ 30.760169] RAX: ffff8801d92866c0 RBX: ffff8801d8d950c0 RCX: ffffffff8761b7f6 [ 30.767420] RDX: 0000000000000000 RSI: ffffffff8761b8b7 RDI: 0000000000000005 [ 30.774682] RBP: ffff8801abdaf568 R08: ffff8801d92866c0 R09: ffffed003b1b2a28 [ 30.781936] R10: ffffed003b1b2a28 R11: ffff8801d8d95143 R12: 1ffff100357b5e94 [ 30.789187] R13: ffff8801abdaf540 R14: ffffffff899372c0 R15: ffff8801d8d95140 [ 30.796460] ? smc_unhash_sk+0x296/0x4b0 [ 30.800505] ? smc_unhash_sk+0x357/0x4b0 [ 30.804555] ? smc_rx_data_available+0x120/0x120 [ 30.809297] ? release_sock+0x1ec/0x2c0 [ 30.813271] ? __local_bh_enable_ip+0x161/0x230 [ 30.817927] ? __release_sock+0x3a0/0x3a0 [ 30.822059] ? smc_release+0x2c9/0x670 [ 30.825932] ? trace_hardirqs_on+0xd/0x10 [ 30.830073] ? __local_bh_enable_ip+0x161/0x230 [ 30.834733] smc_release+0x3cf/0x670 [ 30.838441] __sock_release+0xd7/0x260 [ 30.842312] ? __sock_release+0x260/0x260 [ 30.846441] sock_close+0x19/0x20 [ 30.849879] __fput+0x355/0x8b0 [ 30.853143] ? fput+0x1a0/0x1a0 [ 30.856408] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.860897] ____fput+0x15/0x20 [ 30.864159] task_work_run+0x1ec/0x2a0 [ 30.868032] ? task_work_cancel+0x250/0x250 [ 30.872341] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 30.877863] ? switch_task_namespaces+0xa2/0xd0 [ 30.882527] do_exit+0x1b08/0x2750 [ 30.886232] ? mm_update_next_owner+0x9a0/0x9a0 [ 30.890897] ? lock_pin_lock+0x350/0x350 [ 30.894950] ? kasan_check_read+0x11/0x20 [ 30.899078] ? rcu_is_watching+0x8c/0x150 [ 30.903207] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 30.907604] ? check_usage_backwards+0x164/0x3d0 [ 30.912453] ? print_shortest_lock_dependencies+0x80/0x80 [ 30.917973] ? unwind_get_return_address+0x61/0xa0 [ 30.922888] ? graph_lock+0x170/0x170 [ 30.926678] ? graph_lock+0x170/0x170 [ 30.930472] ? find_held_lock+0x36/0x1c0 [ 30.934529] ? lock_downgrade+0x8f0/0x8f0 [ 30.938664] ? kasan_check_read+0x11/0x20 [ 30.942970] ? do_raw_spin_unlock+0xa7/0x2f0 [ 30.947636] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.952748] ? release_sock+0x1ec/0x2c0 [ 30.956703] ? trace_hardirqs_on+0xd/0x10 [ 30.960846] ? __local_bh_enable_ip+0x161/0x230 [ 30.965517] ? _raw_spin_unlock_bh+0x30/0x40 [ 30.969937] ? release_sock+0x1ec/0x2c0 [ 30.973904] ? __release_sock+0x3a0/0x3a0 [ 30.978038] ? __local_bh_enable_ip+0x161/0x230 [ 30.982727] ? smc_setsockopt+0x388/0x6e0 [ 30.986920] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.992447] ? __sys_setsockopt+0x257/0x3b0 [ 30.996763] do_group_exit+0x177/0x440 [ 31.000651] ? mm_fault_error+0x380/0x380 [ 31.004785] ? __ia32_sys_exit+0x50/0x50 [ 31.008874] ? do_syscall_64+0x9a/0x820 [ 31.012857] __x64_sys_exit_group+0x3e/0x50 [ 31.017176] do_syscall_64+0x1b9/0x820 [ 31.021052] ? syscall_return_slowpath+0x5e0/0x5e0 [ 31.026765] ? syscall_return_slowpath+0x31d/0x5e0 [ 31.031681] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.037045] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.041882] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.047052] RIP: 0033:0x43ec78 [ 31.050219] Code: Bad RIP value. [ 31.053580] RSP: 002b:00007ffcd78abe88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 31.061271] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec78 [ 31.068522] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 31.075783] RBP: 00000000004be528 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 31.083033] R10: 0000000020000240 R11: 0000000000000246 R12: 0000000000000001 [ 31.090284] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 31.098220] Dumping ftrace buffer: [ 31.101882] (ftrace buffer empty) [ 31.105577] Kernel Offset: disabled [ 31.109194] Rebooting in 86400 seconds..