[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.593441] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.035022] random: sshd: uninitialized urandom read (32 bytes read) [ 22.749571] random: sshd: uninitialized urandom read (32 bytes read) [ 23.256474] random: sshd: uninitialized urandom read (32 bytes read) [ 35.224216] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.63' (ECDSA) to the list of known hosts. [ 40.723257] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/22 13:51:02 parsed 1 programs [ 42.544252] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/22 13:51:05 executed programs: 0 [ 44.309482] IPVS: Creating netns size=2536 id=1 [ 44.438296] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 44.450487] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 44.494161] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 44.505941] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 44.550430] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 44.561502] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 44.573171] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 44.594016] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 45.087715] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 45.113611] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 45.120280] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 45.127962] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 2018/08/22 13:51:10 executed programs: 495 2018/08/22 13:51:15 executed programs: 1129 2018/08/22 13:51:20 executed programs: 1745 2018/08/22 13:51:25 executed programs: 2372 2018/08/22 13:51:30 executed programs: 3002 2018/08/22 13:51:35 executed programs: 3637 2018/08/22 13:51:40 executed programs: 4273 2018/08/22 13:51:45 executed programs: 4910 [ 87.125294] kasan: CONFIG_KASAN_INLINE enabled [ 87.130132] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 87.137915] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 87.144142] Dumping ftrace buffer: [ 87.147703] (ftrace buffer empty) [ 87.151408] Modules linked in: [ 87.154754] CPU: 0 PID: 23735 Comm: syz-executor0 Not tainted 4.9.123-g8dd3fc2 #31 [ 87.162442] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.171789] task: ffff8801ccc9c800 task.stack: ffff8801c2968000 [ 87.177840] RIP: 0010:[] [] sockfs_setattr+0xbc/0x140 [ 87.186710] RSP: 0018:ffff8801c296fc38 EFLAGS: 00010206 [ 87.192138] RAX: dffffc0000000000 RBX: ffff8801c296fd80 RCX: 0000000000000000 [ 87.199388] RDX: 0000000000000065 RSI: ffffffff8301ce8e RDI: 0000000000000328 [ 87.206639] RBP: ffff8801c296fc50 R08: ffffed003852df4b R09: 0000000000000001 [ 87.213885] R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000 [ 87.221137] R13: 0000000000000000 R14: ffff8801cbfb8000 R15: 0000000000000000 [ 87.228390] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f779fb40 [ 87.236593] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 87.242450] CR2: 00000000200000c0 CR3: 00000001cc76c000 CR4: 00000000001606f0 [ 87.249735] Stack: [ 87.251864] 0000000000001846 ffffffff8301ce30 ffff8801c296fd80 ffff8801c296fcd0 [ 87.259859] ffffffff815d8630 ffff8801bb15c8b0 ffff8801c296fca8 ffff8801cbfb8058 [ 87.267879] ffff8801c296fd40 0000000000000004 000000003913dcb8 ffff8801d9922e20 [ 87.275878] Call Trace: [ 87.278452] [] ? sock_sendpage+0xc0/0xc0 [ 87.284157] [] notify_change2+0xac0/0xdf0 [ 87.289932] [] chown_common+0x482/0x550 [ 87.295534] [] ? chmod_common+0x450/0x450 [ 87.301306] [] ? __mnt_want_write+0x1e3/0x270 [ 87.307449] [] SyS_fchownat+0x115/0x1b0 [ 87.313063] [] ? SyS_chmod+0x130/0x130 [ 87.318580] [] ? do_fast_syscall_32+0xcf/0x870 [ 87.324797] [] ? SyS_chmod+0x130/0x130 [ 87.330315] [] do_fast_syscall_32+0x2f7/0x870 [ 87.336437] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 87.343083] [] entry_SYSENTER_compat+0x90/0xa2 [ 87.349286] Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 87 00 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d f0 49 8d bd 28 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 47 48 8d 7b 08 48 b8 00 00 00 [ 87.376342] RIP [] sockfs_setattr+0xbc/0x140 [ 87.382532] RSP [ 87.386707] ---[ end trace 9f8a90323feb18af ]--- [ 87.391466] Kernel panic - not syncing: Fatal exception [ 87.397125] Dumping ftrace buffer: [ 87.400641] (ftrace buffer empty) [ 87.404325] Kernel Offset: disabled [ 87.407924] Rebooting in 86400 seconds..