[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.832032] 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: [ 21.330057] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 21.624220] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 22.547305] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) [ 22.692748] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 28.055728] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) 2018/03/31 09:56:24 parsed 1 programs 2018/03/31 09:56:24 executed programs: 0 [ 28.464719] IPVS: Creating netns size=2552 id=1 [ 28.535037] kasan: CONFIG_KASAN_INLINE enabled [ 28.539496] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.552361] Dumping ftrace buffer: [ 28.555873] (ftrace buffer empty) [ 28.559552] Modules linked in: [ 28.562833] CPU: 0 PID: 3757 Comm: syz-executor0 Not tainted 4.4.125-g38f41ec #21 [ 28.570421] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.579747] task: ffff8801c8604800 task.stack: ffff8801c7408000 [ 28.585772] RIP: 0010:[] [] sg_read+0xd3c/0x14d0 [ 28.593843] RSP: 0018:ffff8801c740fb50 EFLAGS: 00010246 [ 28.599260] RAX: dffffc0000000000 RBX: ffff8801c74ac340 RCX: ffffffff825bd793 [ 28.606500] RDX: 0000000000000000 RSI: 0000000020001964 RDI: ffff8801c74ac370 [ 28.613743] RBP: ffff8801c740fc58 R08: 0000000000000000 R09: 0000000000000001 [ 28.620996] R10: 0000000000000000 R11: 1ffff10038e81f30 R12: ffff8801cc3ee7e0 [ 28.628236] R13: 0000000000000000 R14: 000000000000006b R15: ffff8801c74ac200 [ 28.635481] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000a250900 [ 28.643674] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.649525] CR2: 0000000008138024 CR3: 00000001d2ede000 CR4: 0000000000160670 [ 28.656767] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.664007] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.671246] Stack: [ 28.673362] 0000000000000001 ffff8801d9ba97a8 0000000000000003 ffff8801c74ac358 [ 28.681333] c7e1425cd413e296 ffff8801c74ac368 000000000000008f 0000000000000000 [ 28.689305] ffffffff00000000 0000000000001000 1ffff10038e81f76 0000000020001964 [ 28.697286] Call Trace: [ 28.699847] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 28.706485] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 28.713122] [] __vfs_read+0x103/0x440 [ 28.718544] [] ? vfs_iter_write+0x2d0/0x2d0 [ 28.724493] [] ? fsnotify+0x5ad/0xee0 [ 28.729932] [] ? fsnotify+0xee0/0xee0 [ 28.735351] [] ? compat_SyS_ioctl+0x117/0x2540 [ 28.741554] [] ? avc_policy_seqno+0x9/0x20 [ 28.747410] [] ? selinux_file_permission+0x348/0x460 [ 28.754131] [] ? security_file_permission+0x89/0x1e0 [ 28.760862] [] ? rw_verify_area+0x100/0x2f0 [ 28.766802] [] vfs_read+0x123/0x3a0 [ 28.772046] [] SyS_read+0xd9/0x1b0 [ 28.777212] [] ? do_sendfile+0xd30/0xd30 [ 28.782906] [] ? do_fast_syscall_32+0xd7/0x8a0 [ 28.789126] [] ? do_sendfile+0xd30/0xd30 [ 28.794805] [] do_fast_syscall_32+0x321/0x8a0 [ 28.800930] [] sysenter_flags_fixed+0xd/0x17 [ 28.806963] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 ad 06 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 28 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 81 06 00 00 4d 8b 6d 00 4d 85 ed 0f 84 46 03 [ 28.833607] RIP [] sg_read+0xd3c/0x14d0 [ 28.839322] RSP [ 28.843005] ---[ end trace 6387ae822ec11df8 ]--- [ 28.849216] Kernel panic - not syncing: Fatal exception [ 28.855026] Dumping ftrace buffer: [ 28.858539] (ftrace buffer empty) [ 28.862222] Kernel Offset: disabled [ 28.865819] Rebooting in 86400 seconds..