[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.423480] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.852147] random: sshd: uninitialized urandom read (32 bytes read) [ 24.208415] random: sshd: uninitialized urandom read (32 bytes read) [ 25.040263] random: sshd: uninitialized urandom read (32 bytes read) [ 25.188640] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.32' (ECDSA) to the list of known hosts. [ 30.959825] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/16 10:51:36 parsed 1 programs [ 32.553598] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/16 10:51:38 executed programs: 0 [ 33.701860] IPVS: ftp: loaded support on port[0] = 21 [ 33.791263] ip (4599) used greatest stack depth: 17000 bytes left [ 33.820316] WARNING: CPU: 1 PID: 4600 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 33.828747] Kernel panic - not syncing: panic_on_warn set ... [ 33.828747] [ 33.836094] CPU: 1 PID: 4600 Comm: syz-executor0 Not tainted 4.18.0-rc5+ #52 [ 33.843295] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.852647] Call Trace: [ 33.855221] dump_stack+0x1c9/0x2b4 [ 33.858829] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.864011] panic+0x238/0x4e7 [ 33.867193] ? add_taint.cold.5+0x16/0x16 [ 33.871322] ? __warn.cold.8+0x148/0x1ba [ 33.875363] ? __warn.cold.8+0x117/0x1ba [ 33.879412] ? smc_unhash_sk+0x357/0x4b0 [ 33.883453] __warn.cold.8+0x163/0x1ba [ 33.887321] ? smc_unhash_sk+0x357/0x4b0 [ 33.891361] report_bug+0x252/0x2d0 [ 33.894969] do_error_trap+0x1fc/0x4d0 [ 33.898835] ? graph_lock+0x170/0x170 [ 33.902635] ? math_error+0x3e0/0x3e0 [ 33.906419] ? lock_acquire+0x1e4/0x540 [ 33.910376] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.915200] do_invalid_op+0x1b/0x20 [ 33.918892] invalid_op+0x14/0x20 [ 33.922326] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 33.926968] 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 [ 33.946158] RSP: 0018:ffff8801d89a79f8 EFLAGS: 00010293 [ 33.951501] RAX: ffff8801ac656400 RBX: ffff8801d8b9b0c0 RCX: ffffffff8761c7f6 [ 33.958748] RDX: 0000000000000000 RSI: ffffffff8761c8b7 RDI: 0000000000000005 [ 33.966002] RBP: ffff8801d89a7ae0 R08: ffff8801ac656400 R09: ffffed003b173628 [ 33.973257] R10: ffffed003b173628 R11: ffff8801d8b9b143 R12: 1ffff1003b134f43 [ 33.980504] R13: ffff8801d89a7ab8 R14: ffffffff899373c0 R15: ffff8801d8b9b140 [ 33.987763] ? smc_unhash_sk+0x296/0x4b0 [ 33.991810] ? smc_unhash_sk+0x357/0x4b0 [ 33.995852] ? smc_unhash_sk+0x357/0x4b0 [ 33.999900] ? smc_rx_data_available+0x120/0x120 [ 34.004658] ? release_sock+0x1ec/0x2c0 [ 34.008636] ? __local_bh_enable_ip+0x161/0x230 [ 34.013283] ? __release_sock+0x3a0/0x3a0 [ 34.017409] ? smc_release+0x2c9/0x670 [ 34.021281] ? trace_hardirqs_on+0xd/0x10 [ 34.025413] ? __local_bh_enable_ip+0x161/0x230 [ 34.030064] smc_release+0x3cf/0x670 [ 34.033761] __sock_release+0xd7/0x260 [ 34.037625] ? __sock_release+0x260/0x260 [ 34.041759] sock_close+0x19/0x20 [ 34.045194] __fput+0x355/0x8b0 [ 34.048455] ? fput+0x1a0/0x1a0 [ 34.051716] ? _raw_spin_unlock_irq+0x27/0x70 [ 34.056192] ____fput+0x15/0x20 [ 34.059461] task_work_run+0x1ec/0x2a0 [ 34.063328] ? task_work_cancel+0x250/0x250 [ 34.067632] ? exit_to_usermode_loop+0x8c/0x370 [ 34.072291] exit_to_usermode_loop+0x313/0x370 [ 34.076856] ? syscall_slow_exit_work+0x500/0x500 [ 34.081684] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.087212] do_fast_syscall_32+0xcd5/0xfb2 [ 34.091515] ? do_int80_syscall_32+0x890/0x890 [ 34.096077] ? syscall_slow_exit_work+0x500/0x500 [ 34.100910] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.106438] ? syscall_return_slowpath+0x31d/0x5e0 [ 34.111349] ? sysret32_from_system_call+0x5/0x46 [ 34.116183] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.121013] entry_SYSENTER_compat+0x70/0x7f [ 34.125416] RIP: 0023:0xf7fafcb9 [ 34.128756] 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 [ 34.147929] RSP: 002b:00000000ff9e816c EFLAGS: 00000246 ORIG_RAX: 0000000000000006 [ 34.155619] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000008150138 [ 34.162868] RDX: 0000000000000004 RSI: 0000000000000001 RDI: 00000000ff9e8828 [ 34.170123] RBP: 00000000000003c0 R08: 0000000000000000 R09: 0000000000000000 [ 34.177371] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 34.184618] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.192481] Dumping ftrace buffer: [ 34.196149] (ftrace buffer empty) [ 34.199838] Kernel Offset: disabled [ 34.203449] Rebooting in 86400 seconds..