[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.474805] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.163209] random: sshd: uninitialized urandom read (32 bytes read) [ 23.495011] random: sshd: uninitialized urandom read (32 bytes read) [ 24.367411] random: sshd: uninitialized urandom read (32 bytes read) [ 24.515689] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. [ 29.974462] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/16 08:12:51 parsed 1 programs [ 31.568291] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/16 08:12:54 executed programs: 0 [ 32.763500] IPVS: ftp: loaded support on port[0] = 21 [ 32.879856] WARNING: CPU: 1 PID: 4602 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 32.888295] Kernel panic - not syncing: panic_on_warn set ... [ 32.888295] [ 32.895667] CPU: 1 PID: 4602 Comm: syz-executor0 Not tainted 4.18.0-rc5+ #52 [ 32.902834] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.912177] Call Trace: [ 32.914776] dump_stack+0x1c9/0x2b4 [ 32.918388] ? dump_stack_print_info.cold.2+0x52/0x52 [ 32.923565] panic+0x238/0x4e7 [ 32.926742] ? add_taint.cold.5+0x16/0x16 [ 32.930874] ? __warn.cold.8+0x148/0x1ba [ 32.934925] ? __warn.cold.8+0x117/0x1ba [ 32.938992] ? smc_unhash_sk+0x357/0x4b0 [ 32.943051] __warn.cold.8+0x163/0x1ba [ 32.946952] ? smc_unhash_sk+0x357/0x4b0 [ 32.950997] report_bug+0x252/0x2d0 [ 32.954615] do_error_trap+0x1fc/0x4d0 [ 32.958496] ? graph_lock+0x170/0x170 [ 32.962279] ? math_error+0x3e0/0x3e0 [ 32.966075] ? lock_acquire+0x1e4/0x540 [ 32.970047] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.974884] do_invalid_op+0x1b/0x20 [ 32.978586] invalid_op+0x14/0x20 [ 32.982034] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 32.986686] 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 [ 33.005872] RSP: 0018:ffff8801d909f9f8 EFLAGS: 00010293 [ 33.011231] RAX: ffff8801d9344580 RBX: ffff8801d8e590c0 RCX: ffffffff8761c7f6 [ 33.018480] RDX: 0000000000000000 RSI: ffffffff8761c8b7 RDI: 0000000000000005 [ 33.025730] RBP: ffff8801d909fae0 R08: ffff8801d9344580 R09: ffffed003b1cb228 [ 33.032981] R10: ffffed003b1cb228 R11: ffff8801d8e59143 R12: 1ffff1003b213f43 [ 33.040255] R13: ffff8801d909fab8 R14: ffffffff899373c0 R15: ffff8801d8e59140 [ 33.047528] ? smc_unhash_sk+0x296/0x4b0 [ 33.051577] ? smc_unhash_sk+0x357/0x4b0 [ 33.055623] ? smc_unhash_sk+0x357/0x4b0 [ 33.059668] ? smc_rx_data_available+0x120/0x120 [ 33.064405] ? release_sock+0x1ec/0x2c0 [ 33.068364] ? __local_bh_enable_ip+0x161/0x230 [ 33.073021] ? __release_sock+0x3a0/0x3a0 [ 33.077159] ? smc_release+0x2c9/0x670 [ 33.081039] ? trace_hardirqs_on+0xd/0x10 [ 33.085169] ? __local_bh_enable_ip+0x161/0x230 [ 33.089824] smc_release+0x3cf/0x670 [ 33.093539] __sock_release+0xd7/0x260 [ 33.097409] ? __sock_release+0x260/0x260 [ 33.101541] sock_close+0x19/0x20 [ 33.104981] __fput+0x355/0x8b0 [ 33.108248] ? fput+0x1a0/0x1a0 [ 33.111513] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.116021] ____fput+0x15/0x20 [ 33.119293] task_work_run+0x1ec/0x2a0 [ 33.123175] ? task_work_cancel+0x250/0x250 [ 33.127491] ? exit_to_usermode_loop+0x8c/0x370 [ 33.132163] exit_to_usermode_loop+0x313/0x370 [ 33.136730] ? syscall_slow_exit_work+0x500/0x500 [ 33.141554] ? mm_fault_error+0x380/0x380 [ 33.145696] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.151229] do_fast_syscall_32+0xcd5/0xfb2 [ 33.155535] ? do_int80_syscall_32+0x890/0x890 [ 33.160097] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.164850] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.170369] ? syscall_return_slowpath+0x31d/0x5e0 [ 33.175284] ? sysret32_from_system_call+0x5/0x46 [ 33.180123] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.184960] entry_SYSENTER_compat+0x70/0x7f [ 33.189349] RIP: 0023:0xf7fc3cb9 [ 33.192697] 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 [ 33.211921] RSP: 002b:00000000ff883bdc EFLAGS: 00000246 ORIG_RAX: 0000000000000006 [ 33.219624] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000008150420 [ 33.226892] RDX: 0000000000000004 RSI: 0000000000000001 RDI: 00000000ff884298 [ 33.234153] RBP: 00000000000003c0 R08: 0000000000000000 R09: 0000000000000000 [ 33.241411] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.248679] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.256698] Dumping ftrace buffer: [ 33.260391] (ftrace buffer empty) [ 33.264093] Kernel Offset: disabled [ 33.267704] Rebooting in 86400 seconds..