[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.899270] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   20.347900] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   20.625433] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   21.525661] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available)
[   21.710347] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available)
Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts.
[   27.143202] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available)
executing program
[   27.244082] kasan: CONFIG_KASAN_INLINE enabled
[   27.248539] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.261361] Dumping ftrace buffer:
[   27.264865]    (ftrace buffer empty)
[   27.268552] Modules linked in:
[   27.271827] CPU: 0 PID: 3326 Comm: syzkaller102166 Not tainted 4.4.107-g610c835 #12
[   27.279682] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.289004] task: ffff8800b5a35f00 task.stack: ffff8801d10d8000
[   27.295027] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.303257] RSP: 0018:ffff8801d10dfab0  EFLAGS: 00010a07
[   27.308678] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   27.315920] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   27.323157] RBP: ffff8801d10dfac0 R08: 0000000000000001 R09: 0000000000000000
[   27.330394] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   27.337636] R13: 0000000000000020 R14: ffff8801d086c200 R15: dffffc0000000000
[   27.344871] FS:  0000000001a3b880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   27.353062] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.358930] CR2: 0000000020001000 CR3: 00000001d1028000 CR4: 00000000001406f0
[   27.366184] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.373430] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.380664] Stack:
[   27.382780]  0000000000000000 ffff8801d086c358 ffff8801d10dfb20 ffffffff825b8cf1
[   27.390747]  ffff8801d086c370 ffffed003a10d86b ffffed003a10d86e ffff8801d086c368
[   27.398705]  dead4ead00000000 ffff8801d086c340 0000000000000000 0000000000000000
[   27.406653] Call Trace:
[   27.409217]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   27.415675]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   27.421699]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   27.427809]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   27.433751]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   27.438997]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   27.444760]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   27.451402]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   27.458387]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   27.465018]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   27.470432]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   27.476368]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   27.481784]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   27.487201]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   27.493049]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   27.499768]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   27.506491]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   27.512431]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   27.517675]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   27.522829]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   27.528507]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   27.534971]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   27.541528] Code: 76 ae 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 
[   27.567876] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.573755]  RSP <ffff8801d10dfab0>
[   27.577453] ---[ end trace a9d332c1ddfd333c ]---
[   27.582198] Kernel panic - not syncing: Fatal exception
[   27.587947] Dumping ftrace buffer:
[   27.591462]    (ftrace buffer empty)
[   27.595140] Kernel Offset: disabled
[   27.598739] Rebooting in 86400 seconds..