[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   17.190086] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   19.723115] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   20.123733] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   20.990951] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available)
[   32.729055] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available)
Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts.
[   38.107185] random: sshd: uninitialized urandom read (32 bytes read, 114 bits of entropy available)
executing program
[   38.204963] kasan: CONFIG_KASAN_INLINE enabled
[   38.209416] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   38.222262] Dumping ftrace buffer:
[   38.225772]    (ftrace buffer empty)
[   38.229454] Modules linked in:
[   38.232745] CPU: 0 PID: 3330 Comm: syzkaller443015 Not tainted 4.4.113-ge70c132 #34
[   38.240507] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   38.249831] task: ffff8801d0b5c740 task.stack: ffff8801d0168000
[   38.255856] RIP: 0010:[<ffffffff81433721>]  [<ffffffff81433721>] __free_pages+0x21/0x90
[   38.264092] RSP: 0018:ffff8801d016fab0  EFLAGS: 00010a07
[   38.269510] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b6f2b
[   38.276750] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   38.283989] RBP: ffff8801d016fac0 R08: 0000000000000001 R09: 0000000000000000
[   38.291232] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   38.298475] R13: 0000000000000020 R14: ffff8801d0bf4200 R15: dffffc0000000000
[   38.305716] FS:  0000000001afb880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   38.313914] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   38.319778] CR2: 0000000020a2f000 CR3: 00000001d146e000 CR4: 0000000000160670
[   38.327031] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   38.334271] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   38.341511] Stack:
[   38.343627]  0000000000000000 ffff8801d0bf4358 ffff8801d016fb20 ffffffff825b6f51
[   38.351614]  ffff8801d0bf4370 ffffed003a17e86b ffffed003a17e86e ffff8801d0bf4368
[   38.359580]  dead4ead00000000 ffff8801d0bf4340 0000000000000000 0000000000000000
[   38.368250] Call Trace:
[   38.370811]  [<ffffffff825b6f51>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   38.377274]  [<ffffffff825b7315>] sg_finish_rem_req+0x2b5/0x340
[   38.383301]  [<ffffffff825b73d9>] sg_new_read.isra.18+0x39/0x3c0
[   38.389416]  [<ffffffff825b56d2>] ? sg_get_rq_mark+0x142/0x190
[   38.395357]  [<ffffffff825b903c>] sg_read+0x8bc/0x1490
[   38.400602]  [<ffffffff825b8780>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   38.407240]  [<ffffffff8150d089>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   38.414224]  [<ffffffff825b8780>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   38.420859]  [<ffffffff8151bc93>] __vfs_read+0x103/0x440
[   38.426280]  [<ffffffff8151bb90>] ? vfs_iter_write+0x2d0/0x2d0
[   38.432248]  [<ffffffff815e829d>] ? fsnotify+0x5ad/0xee0
[   38.437668]  [<ffffffff815e8bd0>] ? fsnotify+0xee0/0xee0
[   38.443091]  [<ffffffff81b4b9c9>] ? avc_policy_seqno+0x9/0x20
[   38.448945]  [<ffffffff81b5d098>] ? selinux_file_permission+0x348/0x460
[   38.455668]  [<ffffffff81b428c9>] ? security_file_permission+0x89/0x1e0
[   38.462393]  [<ffffffff8151d820>] ? rw_verify_area+0x100/0x2f0
[   38.468335]  [<ffffffff8151db33>] vfs_read+0x123/0x3a0
[   38.473584]  [<ffffffff81520479>] SyS_read+0xd9/0x1b0
[   38.478742]  [<ffffffff815203a0>] ? do_sendfile+0xd30/0xd30
[   38.484422]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   38.490898]  [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98
[   38.497454] Code: b6 9f 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 
[   38.524040] RIP  [<ffffffff81433721>] __free_pages+0x21/0x90
[   38.529930]  RSP <ffff8801d016fab0>
[   38.537958] ---[ end trace 818eaf7fcf819daf ]---
[   38.542757] Kernel panic - not syncing: Fatal exception
[   38.548471] Dumping ftrace buffer:
[   38.551987]    (ftrace buffer empty)
[   38.555668] Kernel Offset: disabled
[   38.559266] Rebooting in 86400 seconds..