[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.128182] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 20.283182] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.601227] random: sshd: uninitialized urandom read (32 bytes read) [ 21.484433] random: sshd: uninitialized urandom read (32 bytes read) [ 21.637578] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.12' (ECDSA) to the list of known hosts. [ 27.122693] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/14 02:23:58 parsed 1 programs [ 28.819144] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/14 02:24:00 executed programs: 0 [ 29.992272] IPVS: ftp: loaded support on port[0] = 21 [ 30.110191] WARNING: CPU: 0 PID: 4522 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 30.118644] Kernel panic - not syncing: panic_on_warn set ... [ 30.118644] [ 30.126020] CPU: 0 PID: 4522 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #48 [ 30.133199] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.142544] Call Trace: [ 30.145122] dump_stack+0x1c9/0x2b4 [ 30.148739] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.153921] panic+0x238/0x4e7 [ 30.157098] ? add_taint.cold.5+0x16/0x16 [ 30.161247] ? __warn.cold.8+0x148/0x1ba [ 30.165294] ? __warn.cold.8+0x117/0x1ba [ 30.169345] ? smc_unhash_sk+0x357/0x4b0 [ 30.173405] __warn.cold.8+0x163/0x1ba [ 30.177316] ? smc_unhash_sk+0x357/0x4b0 [ 30.181383] report_bug+0x252/0x2d0 [ 30.185027] do_error_trap+0x1fc/0x4d0 [ 30.188911] ? graph_lock+0x170/0x170 [ 30.192699] ? math_error+0x3e0/0x3e0 [ 30.196490] ? lock_acquire+0x1e4/0x540 [ 30.200458] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.205286] do_invalid_op+0x1b/0x20 [ 30.208990] invalid_op+0x14/0x20 [ 30.212435] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 30.217085] 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 [ 30.236262] RSP: 0018:ffff8801b377f9f8 EFLAGS: 00010293 [ 30.241617] RAX: ffff8801b379e240 RBX: ffff8801b324b0c0 RCX: ffffffff8761b7f6 [ 30.248880] RDX: 0000000000000000 RSI: ffffffff8761b8b7 RDI: 0000000000000005 [ 30.256132] RBP: ffff8801b377fae0 R08: ffff8801b379e240 R09: ffffed0036649628 [ 30.263384] R10: ffffed0036649628 R11: ffff8801b324b143 R12: 1ffff100366eff43 [ 30.270660] R13: ffff8801b377fab8 R14: ffffffff89937340 R15: ffff8801b324b140 [ 30.277931] ? smc_unhash_sk+0x296/0x4b0 [ 30.281988] ? smc_unhash_sk+0x357/0x4b0 [ 30.286049] ? smc_unhash_sk+0x357/0x4b0 [ 30.290101] ? smc_rx_data_available+0x120/0x120 [ 30.294845] ? release_sock+0x1ec/0x2c0 [ 30.298816] ? __local_bh_enable_ip+0x161/0x230 [ 30.303471] ? __release_sock+0x3a0/0x3a0 [ 30.307612] ? smc_release+0x2c9/0x670 [ 30.311488] ? trace_hardirqs_on+0xd/0x10 [ 30.315629] ? __local_bh_enable_ip+0x161/0x230 [ 30.320294] smc_release+0x3cf/0x670 [ 30.324021] __sock_release+0xd7/0x260 [ 30.327915] ? __sock_release+0x260/0x260 [ 30.332050] sock_close+0x19/0x20 [ 30.335489] __fput+0x355/0x8b0 [ 30.338754] ? fput+0x1a0/0x1a0 [ 30.342040] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.346609] ____fput+0x15/0x20 [ 30.349874] task_work_run+0x1ec/0x2a0 [ 30.353747] ? task_work_cancel+0x250/0x250 [ 30.358056] ? exit_to_usermode_loop+0x8c/0x370 [ 30.362726] exit_to_usermode_loop+0x313/0x370 [ 30.367304] ? syscall_slow_exit_work+0x500/0x500 [ 30.372146] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.377674] do_fast_syscall_32+0xcd5/0xfb2 [ 30.381993] ? do_int80_syscall_32+0x890/0x890 [ 30.386563] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.391308] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.396829] ? syscall_return_slowpath+0x31d/0x5e0 [ 30.401744] ? sysret32_from_system_call+0x5/0x46 [ 30.406577] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.411410] entry_SYSENTER_compat+0x70/0x7f [ 30.415802] RIP: 0023:0xf7f50cb9 [ 30.419146] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 30.438331] RSP: 002b:00000000ffb1181c EFLAGS: 00000246 ORIG_RAX: 0000000000000006 [ 30.446032] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000008150138 [ 30.453303] RDX: 0000000000000004 RSI: 0000000000000001 RDI: 00000000ffb11ed8 [ 30.460556] RBP: 00000000000003c0 R08: 0000000000000000 R09: 0000000000000000 [ 30.467808] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.475078] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.483428] Dumping ftrace buffer: [ 30.487129] (ftrace buffer empty) [ 30.490818] Kernel Offset: disabled [ 30.494438] Rebooting in 86400 seconds..