[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.814532] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.239581] random: sshd: uninitialized urandom read (32 bytes read) [ 20.650672] random: sshd: uninitialized urandom read (32 bytes read) [ 21.569039] random: sshd: uninitialized urandom read (32 bytes read) [ 71.810546] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. [ 77.282777] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/19 13:13:49 parsed 1 programs [ 79.041746] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/19 13:13:51 executed programs: 0 [ 79.948382] IPVS: Creating netns size=2536 id=1 [ 79.983854] IPVS: Creating netns size=2536 id=2 [ 80.017604] IPVS: Creating netns size=2536 id=3 [ 80.051687] IPVS: Creating netns size=2536 id=4 [ 80.092281] IPVS: Creating netns size=2536 id=5 [ 80.147427] IPVS: Creating netns size=2536 id=6 [ 80.193205] IPVS: Creating netns size=2536 id=7 [ 80.269518] IPVS: Creating netns size=2536 id=8 2018/07/19 13:13:56 executed programs: 298 2018/07/19 13:14:01 executed programs: 576 2018/07/19 13:14:06 executed programs: 857 2018/07/19 13:14:11 executed programs: 1119 2018/07/19 13:14:16 executed programs: 1421 2018/07/19 13:14:21 executed programs: 1689 2018/07/19 13:14:26 executed programs: 1965 INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes 2018/07/19 13:14:31 executed programs: 2229 2018/07/19 13:14:36 executed programs: 2493 2018/07/19 13:14:41 executed programs: 2761 2018/07/19 13:14:47 executed programs: 3038 [ 136.251582] Buffer I/O error on dev loop3, logical block 0, async page read 2018/07/19 13:14:52 executed programs: 3310 2018/07/19 13:14:57 executed programs: 3584 2018/07/19 13:15:02 executed programs: 3882 2018/07/19 13:15:07 executed programs: 4137 2018/07/19 13:15:12 executed programs: 4389 2018/07/19 13:15:17 executed programs: 4702 [ 166.089997] kasan: CONFIG_KASAN_INLINE enabled [ 166.090299] Buffer I/O error on dev loop3, logical block 0, lost async page write [ 166.090338] Buffer I/O error on dev loop3, logical block 1, lost async page write [ 166.090358] Buffer I/O error on dev loop3, logical block 2, lost async page write [ 166.090378] Buffer I/O error on dev loop3, logical block 3, lost async page write [ 166.090398] Buffer I/O error on dev loop3, logical block 4, lost async page write [ 166.090417] Buffer I/O error on dev loop3, logical block 5, lost async page write [ 166.090437] Buffer I/O error on dev loop3, logical block 6, lost async page write [ 166.090456] Buffer I/O error on dev loop3, logical block 7, lost async page write [ 166.090476] Buffer I/O error on dev loop3, logical block 8, lost async page write [ 166.090495] Buffer I/O error on dev loop3, logical block 9, lost async page write [ 166.188370] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 166.197366] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 166.203603] Dumping ftrace buffer: [ 166.207152] (ftrace buffer empty) [ 166.210847] Modules linked in: [ 166.214152] CPU: 1 PID: 23751 Comm: syz-executor5 Not tainted 4.9.113-g47bbcd6 #14 [ 166.221835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 166.231173] task: ffff8801b82ac800 task.stack: ffff8801c02b0000 [ 166.237214] RIP: 0010:[] [] loop_validate_file+0x20d/0x400 [ 166.246183] RSP: 0018:ffff8801c02b7c80 EFLAGS: 00010206 [ 166.251623] RAX: 0000000000000036 RBX: dffffc0000000000 RCX: 0000000000000000 [ 166.258879] RDX: 0000000000000000 RSI: ffffffff825c4ebd RDI: 00000000000001b0 [ 166.266142] RBP: ffff8801c02b7c98 R08: ffff8801b82ad110 R09: 0000000000000001 [ 166.273499] R10: 0000000000000000 R11: 1ffff10037055a1d R12: 0000000000000000 [ 166.280770] R13: ffff8801cbff0000 R14: ffff8801cbff0000 R15: ffff8801d5ceb2d8 [ 166.288034] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7738b40 [ 166.296245] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 166.302121] CR2: 00007f6070fe0df8 CR3: 00000001c03f0000 CR4: 00000000001606f0 [ 166.309391] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 166.316645] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 166.323902] Stack: [ 166.326036] ffff8801d5ceb180 0000000000004c00 ffff8801bbaeac00 ffff8801c02b7d20 [ 166.334070] ffffffff825ca8f7 ffff8801ffffffff ffffffff81235a3b ffff8801d3f9c590 [ 166.342081] 0000000000000001 ffff8801d42b62b8 ffff8801d5ceb2d0 c7284d18b6de57f8 [ 166.350108] Call Trace: [ 166.352677] [] lo_ioctl+0x6a7/0x1690 [ 166.358051] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 166.364878] [] lo_compat_ioctl+0xb2/0x140 [ 166.370661] [] ? lo_ioctl+0x1690/0x1690 [ 166.376277] [] compat_blkdev_ioctl+0x3a5/0x3ad0 [ 166.382591] [] ? __fget+0x20a/0x3b0 [ 166.387848] [] ? cfq_dispatch_requests+0x2ef0/0x2ef0 [ 166.394592] [] ? __fget+0x231/0x3b0 [ 166.399858] [] ? __fget+0x47/0x3b0 [ 166.405036] [] ? security_file_ioctl+0x8f/0xc0 [ 166.411256] [] compat_SyS_ioctl+0x126/0x1fe0 [ 166.417311] [] ? cfq_dispatch_requests+0x2ef0/0x2ef0 [ 166.424059] [] ? do_ioctl+0x60/0x60 [ 166.429333] [] do_fast_syscall_32+0x2f7/0x870 [ 166.435476] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 166.442131] [] entry_SYSENTER_compat+0x90/0xa2 [ 166.448352] Code: 00 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 f7 01 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b0 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 cc 01 00 00 4d 8b a4 24 b0 01 00 00 4c 89 e0 [ 166.475576] RIP [] loop_validate_file+0x20d/0x400 [ 166.482178] RSP [ 166.486289] ---[ end trace 2ca1a20151b06220 ]--- [ 166.491078] Kernel panic - not syncing: Fatal exception [ 166.497073] Dumping ftrace buffer: [ 166.500617] (ftrace buffer empty) [ 166.504311] Kernel Offset: disabled [ 166.507934] Rebooting in 86400 seconds..