[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.651156] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. [ 21.082765] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [ 21.394799] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.478119] random: sshd: uninitialized urandom read (32 bytes read, 121 bits of entropy available) [ 22.646534] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) [ 24.390366] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.35' (ECDSA) to the list of known hosts. 2018/03/05 19:32:25 parsed 1 programs 2018/03/05 19:32:25 executed programs: 0 [ 28.303590] IPVS: Creating netns size=2552 id=1 [ 28.334367] sg_write: data in/out 167162/110 bytes for SCSI command 0xff-- guessing data in; [ 28.334367] program syz-executor0 not setting count and/or reply_len properly [ 28.351545] kasan: CONFIG_KASAN_INLINE enabled [ 28.355929] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.368771] Dumping ftrace buffer: [ 28.372279] (ftrace buffer empty) [ 28.375956] Modules linked in: [ 28.379233] CPU: 1 PID: 3788 Comm: syz-executor0 Not tainted 4.4.119-g855ea74 #28 [ 28.386818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.396141] task: ffff8801d93c1800 task.stack: ffff8801d1290000 [ 28.402167] RIP: 0010:[] [] sg_read+0xd17/0x1490 [ 28.410223] RSP: 0018:ffff8801d1297a80 EFLAGS: 00010246 [ 28.415638] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825baa9e [ 28.422877] RDX: 0000000000000000 RSI: 0000000020e94024 RDI: ffff8801cd900170 [ 28.430116] RBP: ffff8801d1297b88 R08: 0000000000000000 R09: 0000000000000001 [ 28.437356] R10: 0000000000000000 R11: 1ffff1003a252f16 R12: 000000000000001a [ 28.444593] R13: 0000000000000000 R14: ffff8801d4f36420 R15: ffff8801cd900140 [ 28.451832] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009804900 [ 28.460027] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.465875] CR2: 0000000020e94000 CR3: 00000001c985e000 CR4: 0000000000160670 [ 28.473116] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.480356] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.487593] Stack: [ 28.489709] ffffffff812da5fc dffffc0000000000 ffff8801d94caf80 ffff8801cd900158 [ 28.497683] ffffffff812dad23 ffff8801cd900168 000000000000003e 0804c134838444e0 [ 28.505651] ffff8801d4935b80 0000000000001000 1ffff1003a252f5c 0000000020e94024 [ 28.513619] Call Trace: [ 28.516177] [] ? drop_futex_key_refs.isra.10+0x6c/0xe0 [ 28.523073] [] ? futex_wake+0x153/0x450 [ 28.528666] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 28.535303] [] ? fsnotify+0xee0/0xee0 [ 28.540725] [] ? avc_policy_seqno+0x9/0x20 [ 28.546579] [] do_loop_readv_writev+0x141/0x1e0 [ 28.552864] [] ? security_file_permission+0x89/0x1e0 [ 28.559586] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 28.566232] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 28.572865] [] compat_do_readv_writev+0x5df/0x6e0 [ 28.579323] [] ? vfs_writev+0xb0/0xb0 [ 28.584743] [] ? exit_robust_list+0x240/0x240 [ 28.590858] [] ? _raw_spin_unlock+0x2c/0x50 [ 28.596798] [] ? handle_mm_fault+0x3f2/0x3190 [ 28.602913] [] ? security_file_permission+0x89/0x1e0 [ 28.609632] [] compat_readv+0xd9/0x140 [ 28.615138] [] compat_SyS_readv+0xd8/0x1b0 [ 28.620994] [] ? SyS_pwritev+0x230/0x230 [ 28.626672] [] ? vmacache_update+0xfe/0x130 [ 28.632610] [] ? do_fast_syscall_32+0xd7/0x8a0 [ 28.638807] [] ? SyS_pwritev+0x230/0x230 [ 28.644484] [] do_fast_syscall_32+0x321/0x8a0 [ 28.650599] [] sysenter_flags_fixed+0xd/0x17 [ 28.656621] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 97 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 6b 06 00 00 48 8b 1b 48 85 db 0f 84 3b 03 00 [ 28.683220] RIP [] sg_read+0xd17/0x1490 [ 28.688932] RSP [ 28.692639] ---[ end trace 1fc4b1d3dc3aa071 ]--- [ 28.697375] Kernel panic - not syncing: Fatal exception [ 28.703126] Dumping ftrace buffer: [ 28.706643] (ftrace buffer empty) [ 28.710320] Kernel Offset: disabled [ 28.713913] Rebooting in 86400 seconds..