[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   17.115920] 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: [   21.278741] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available)
[   21.612223] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available)
[   22.382021] random: sshd: uninitialized urandom read (32 bytes read, 94 bits of entropy available)
[   27.072146] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available)
Warning: Permanently added '10.128.15.210' (ECDSA) to the list of known hosts.
[   32.473198] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available)
executing program
[   32.561322] kasan: CONFIG_KASAN_INLINE enabled
[   32.565733] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   32.578557] Dumping ftrace buffer:
[   32.582065]    (ftrace buffer empty)
[   32.585742] Modules linked in:
[   32.589017] CPU: 1 PID: 3616 Comm: syzkaller288220 Not tainted 4.4.115-g0e9bcc1 #11
[   32.596775] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.606105] task: ffff8801cd86b000 task.stack: ffff8801cc7f0000
[   32.612130] RIP: 0010:[<ffffffff814348a1>]  [<ffffffff814348a1>] __free_pages+0x21/0x90
[   32.620360] RSP: 0018:ffff8801cc7f7ab0  EFLAGS: 00010a07
[   32.625774] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b872b
[   32.633019] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   32.640258] RBP: ffff8801cc7f7ac0 R08: 0000000000000000 R09: 0000000000000000
[   32.647495] R10: 0000000000000000 R11: 1ffff100398fef36 R12: 0000000000000004
[   32.654733] R13: 0000000000000020 R14: ffff8800b0e88000 R15: dffffc0000000000
[   32.661971] FS:  0000000002409880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   32.670165] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.676017] CR2: 0000000020a2f000 CR3: 00000000b1366000 CR4: 0000000000160670
[   32.683256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.690491] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.697726] Stack:
[   32.699840]  0000000000000000 ffff8800b0e88158 ffff8801cc7f7b20 ffffffff825b8751
[   32.707806]  ffff8800b0e88170 ffffed00161d102b ffffed00161d102e ffff8800b0e88168
[   32.715766]  dead4ead00000000 ffff8800b0e88140 0000000000000000 0000000000000000
[   32.723725] Call Trace:
[   32.726281]  [<ffffffff825b8751>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   32.732738]  [<ffffffff825b8b15>] sg_finish_rem_req+0x2b5/0x340
[   32.738761]  [<ffffffff825b8bd9>] sg_new_read.isra.18+0x39/0x3c0
[   32.744870]  [<ffffffff825b6ed2>] ? sg_get_rq_mark+0x142/0x190
[   32.750810]  [<ffffffff825ba83c>] sg_read+0x8bc/0x1490
[   32.756468]  [<ffffffff825b9f80>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   32.763104]  [<ffffffff8144a584>] ? __lru_cache_add+0x164/0x240
[   32.769133]  [<ffffffff8150e219>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   32.776112]  [<ffffffff825b9f80>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   32.782753]  [<ffffffff8151cfd3>] __vfs_read+0x103/0x440
[   32.788172]  [<ffffffff8151ced0>] ? vfs_iter_write+0x2d0/0x2d0
[   32.794112]  [<ffffffff815e982d>] ? fsnotify+0x5ad/0xee0
[   32.799529]  [<ffffffff815ea160>] ? fsnotify+0xee0/0xee0
[   32.804948]  [<ffffffff81b4cfc9>] ? avc_policy_seqno+0x9/0x20
[   32.810805]  [<ffffffff81b5e698>] ? selinux_file_permission+0x348/0x460
[   32.817522]  [<ffffffff81b43ec9>] ? security_file_permission+0x89/0x1e0
[   32.824239]  [<ffffffff8151eb60>] ? rw_verify_area+0x100/0x2f0
[   32.830177]  [<ffffffff8151ee73>] vfs_read+0x123/0x3a0
[   32.835417]  [<ffffffff815217b9>] SyS_read+0xd9/0x1b0
[   32.840573]  [<ffffffff815216e0>] ? do_sendfile+0xd30/0xd30
[   32.846258]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   32.852719]  [<ffffffff8377451f>] entry_SYSCALL_64_fastpath+0x1c/0x98
[   32.859263] Code: c6 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 
[   32.885803] RIP  [<ffffffff814348a1>] __free_pages+0x21/0x90
[   32.891685]  RSP <ffff8801cc7f7ab0>
[   32.895646] ---[ end trace 5a9aea90f8b7193a ]---
[   32.901202] Kernel panic - not syncing: Fatal exception
[   32.906918] Dumping ftrace buffer:
[   32.910428]    (ftrace buffer empty)
[   32.914106] Kernel Offset: disabled
[   32.917703] Rebooting in 86400 seconds..