[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.477344] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.454266] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 28.961069] random: sshd: uninitialized urandom read (32 bytes read, 43 bits of entropy available) [ 30.079771] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) [ 39.695274] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available) Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. [ 45.185997] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) 2018/07/19 13:21:18 parsed 1 programs [ 46.682045] random: cc1: uninitialized urandom read (8 bytes read, 128 bits of entropy available) [ 46.901270] random: nonblocking pool is initialized 2018/07/19 13:21:20 executed programs: 0 [ 48.110981] IPVS: Creating netns size=2552 id=1 [ 48.172926] IPVS: Creating netns size=2552 id=2 [ 48.219149] IPVS: Creating netns size=2552 id=3 [ 48.277601] IPVS: Creating netns size=2552 id=4 [ 48.385312] IPVS: Creating netns size=2552 id=5 [ 48.514871] IPVS: Creating netns size=2552 id=6 [ 48.661921] IPVS: Creating netns size=2552 id=7 [ 48.761360] IPVS: Creating netns size=2552 id=8 [ 51.011082] kasan: CONFIG_KASAN_INLINE enabled [ 51.015556] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 51.028525] Dumping ftrace buffer: [ 51.032042] (ftrace buffer empty) [ 51.035733] Modules linked in: [ 51.039032] CPU: 1 PID: 4291 Comm: syz-executor6 Not tainted 4.4.141-g1b37d68 #7 [ 51.046545] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.055902] task: ffff8800b62ee000 task.stack: ffff8801d6a48000 [ 51.061943] RIP: 0010:[] [] loop_validate_file+0x20d/0x400 [ 51.070885] RSP: 0018:ffff8801d6a4fad0 EFLAGS: 00010206 [ 51.076303] RAX: 0000000000000036 RBX: dffffc0000000000 RCX: 0000000000000000 [ 51.083551] RDX: 0000000000000000 RSI: ffffffff8251542d RDI: 00000000000001b0 [ 51.090796] RBP: ffff8801d6a4fae8 R08: ffff8800b62ee928 R09: 0000000000000001 [ 51.098036] R10: 0000000000000000 R11: ffff8800b62ee000 R12: 0000000000000000 [ 51.105284] R13: ffff8801d9c16780 R14: ffff8801d9c16780 R15: ffff8801d6db5c58 [ 51.112532] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f76ecb40 [ 51.120732] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 51.126588] CR2: 00000000f76ebc20 CR3: 00000001c6993000 CR4: 00000000001606f0 [ 51.133833] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.141074] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.148314] Stack: [ 51.150435] ffff8801d6db5b00 0000000000004c00 ffff8801d7b79600 ffff8801d6a4fb78 [ 51.158429] ffffffff8251bc77 ffff8801d6a6a060 ffff880100000001 ffffffff00000000 [ 51.166411] ffffffff81033c86 ffffffff814f8943 ffffffff814f9272 ffff8801d6db5c50 [ 51.174409] Call Trace: [ 51.176977] [] lo_ioctl+0x6a7/0x16c0 [ 51.182318] [] ? save_stack_trace+0x26/0x50 [ 51.188259] [] ? save_stack+0x43/0xd0 [ 51.193679] [] ? kasan_slab_free+0x72/0xc0 [ 51.199536] [] lo_compat_ioctl+0xb2/0x140 [ 51.205311] [] ? lo_ioctl+0x16c0/0x16c0 [ 51.210908] [] compat_blkdev_ioctl+0x395/0x3a10 [ 51.217199] [] ? evict_inodes+0x240/0x360 [ 51.222975] [] ? cfq_dispatch_requests+0x2fc0/0x2fc0 [ 51.229704] [] ? __fget+0x16f/0x3b0 [ 51.234950] [] ? __fget+0x47/0x3b0 [ 51.240112] [] ? security_file_ioctl+0x8f/0xc0 [ 51.246316] [] ? cfq_dispatch_requests+0x2fc0/0x2fc0 [ 51.253037] [] compat_SyS_ioctl+0x484/0x2270 [ 51.259078] [] ? putname+0xdb/0x110 [ 51.264327] [] ? compat_SyS_ppoll+0x420/0x420 [ 51.270444] [] ? kmem_cache_free+0x2b4/0x340 [ 51.276473] [] ? putname+0xe0/0x110 [ 51.281727] [] ? compat_SyS_futex+0x1e1/0x2f0 [ 51.287844] [] ? compat_SyS_get_robust_list+0x310/0x310 [ 51.294827] [] ? vmacache_update+0xfe/0x130 [ 51.300770] [] ? do_fast_syscall_32+0xdb/0x8b0 [ 51.306976] [] ? compat_SyS_ppoll+0x420/0x420 [ 51.313090] [] do_fast_syscall_32+0x326/0x8b0 [ 51.319207] [] sysenter_flags_fixed+0xd/0x17 [ 51.325232] 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 [ 51.352035] RIP [] loop_validate_file+0x20d/0x400 [ 51.358668] RSP [ 51.362738] ---[ end trace 7260a221eae29109 ]--- [ 51.367499] Kernel panic - not syncing: Fatal exception [ 51.373671] Dumping ftrace buffer: [ 51.377188] (ftrace buffer empty) [ 51.380871] Kernel Offset: disabled [ 51.384467] Rebooting in 86400 seconds..