[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.452459] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.111238] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 24.393949] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 24.943690] random: sshd: uninitialized urandom read (32 bytes read, 50 bits of entropy available) [ 25.129673] random: sshd: uninitialized urandom read (32 bytes read, 54 bits of entropy available) Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts. [ 30.554240] random: sshd: uninitialized urandom read (32 bytes read, 58 bits of entropy available) 2018/08/05 12:01:05 parsed 1 programs [ 31.634949] random: cc1: uninitialized urandom read (8 bytes read, 60 bits of entropy available) 2018/08/05 12:01:07 executed programs: 0 [ 32.671461] IPVS: Creating netns size=2552 id=1 [ 32.754982] IPVS: Creating netns size=2552 id=2 [ 32.808128] IPVS: Creating netns size=2552 id=3 [ 32.865935] IPVS: Creating netns size=2552 id=4 [ 32.926957] IPVS: Creating netns size=2552 id=5 [ 33.005653] IPVS: Creating netns size=2552 id=6 [ 33.112072] IPVS: Creating netns size=2552 id=7 [ 33.187105] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.227327] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 33.241147] IPVS: Creating netns size=2552 id=8 [ 33.461543] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.504958] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 33.517963] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 33.559109] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 33.645221] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.730967] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 33.767658] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.798954] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 33.828592] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 33.897665] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 33.908078] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.972712] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 33.983447] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 34.057881] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 34.080500] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 34.087940] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 34.133189] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 34.142261] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 34.149336] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 34.193160] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 34.235516] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 34.245267] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 34.255030] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 34.284884] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 34.328105] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 34.359416] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 34.370612] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 34.378387] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 34.429716] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 34.441296] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 34.450225] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 34.457909] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 34.498368] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 34.513091] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 34.520922] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 34.530399] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 34.610989] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 34.624132] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 34.636974] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 34.648126] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 34.687135] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 34.702024] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 34.737192] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 34.761760] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 34.778619] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 34.790950] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 34.806155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 34.815858] ip (4416) used greatest stack depth: 24448 bytes left [ 34.823528] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 34.838573] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 34.859415] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 34.872660] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 34.908794] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 35.037973] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 35.064474] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 35.178917] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 35.268024] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 35.320029] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 35.333350] ip (4567) used greatest stack depth: 23920 bytes left [ 35.357972] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 35.375987] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 35.416625] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 35.438099] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 35.529377] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 38.942612] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.194178] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.230558] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.242814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 39.366678] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.485668] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 39.501626] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 39.511672] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.670260] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 39.823033] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 39.846312] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 40.056063] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 40.257762] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 40.467772] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 40.559012] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 40.846032] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 2018/08/05 12:01:15 executed programs: 8 [ 42.120788] kasan: CONFIG_KASAN_INLINE enabled [ 42.129610] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.143462] Dumping ftrace buffer: [ 42.147002] (ftrace buffer empty) [ 42.150700] Modules linked in: [ 42.154017] CPU: 1 PID: 6611 Comm: syz-executor3 Not tainted 4.4.145-g2241aa9 #78 [ 42.161624] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.170969] task: ffff8800b56c6000 task.stack: ffff8800b7660000 [ 42.177010] RIP: 0010:[] [] loop_validate_file+0x20d/0x400 [ 42.185954] RSP: 0018:ffff8800b7667b70 EFLAGS: 00010206 [ 42.191390] RAX: 0000000000000036 RBX: dffffc0000000000 RCX: ffff8800b56c6000 [ 42.198651] RDX: 0000000000000000 RSI: ffffffff8251965d RDI: 00000000000001b0 [ 42.205898] RBP: ffff8800b7667b88 R08: ffff8800b56c6928 R09: 0000000000000001 [ 42.213142] R10: 0000000000000000 R11: ffff8800b56c6000 R12: 0000000000000000 [ 42.220398] R13: ffff8801d9c11140 R14: ffff8801d9c11140 R15: ffff8801d6a5dc58 [ 42.227644] FS: 00007f82c255a700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 42.235993] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.241848] CR2: 00007ffea13ee004 CR3: 00000000b577e000 CR4: 00000000001606f0 [ 42.249094] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.256340] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.263583] Stack: [ 42.265706] ffff8801d6a5db00 ffff8800b58e9000 0000000000000004 ffff8800b7667c18 [ 42.273719] ffffffff8251fbed 0000000b0000004c 0000000100000006 0000000000000000 [ 42.281720] 0000000300000001 ffff8801d6a5db18 0000000041b58ab3 ffffffff84208310 [ 42.289716] Call Trace: [ 42.292282] [] lo_ioctl+0x3ed/0x16c0 [ 42.297620] [] ? avc_ss_reset+0x110/0x110 [ 42.303393] [] ? loop_probe+0x180/0x180 [ 42.308995] [] blkdev_ioctl+0x7b8/0x19c0 [ 42.314681] [] ? blkpg_ioctl+0x900/0x900 [ 42.320369] [] ? debug_check_no_locks_freed+0x210/0x210 [ 42.327368] [] block_ioctl+0xde/0x120 [ 42.332810] [] ? blkdev_read_iter+0x170/0x170 [ 42.338942] [] do_vfs_ioctl+0x63f/0xf40 [ 42.344541] [] ? ioctl_preallocate+0x1f0/0x1f0 [ 42.350751] [] ? iput+0x226/0x980 [ 42.355896] [] ? __fget+0x16f/0x3b0 [ 42.361148] [] ? __fget+0x47/0x3b0 [ 42.366322] [] ? security_file_ioctl+0x8f/0xc0 [ 42.372528] [] SyS_ioctl+0x8f/0xc0 [ 42.377694] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 42.384255] 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 [ 42.411334] RIP [] loop_validate_file+0x20d/0x400 [ 42.417941] RSP [ 42.423941] ---[ end trace edb1b898ce394c4c ]--- [ 42.428728] Kernel panic - not syncing: Fatal exception [ 42.434426] Dumping ftrace buffer: [ 42.437948] (ftrace buffer empty) [ 42.441629] Kernel Offset: disabled [ 42.445224] Rebooting in 86400 seconds..