[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.990515] 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: [   19.980160] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   20.280759] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   21.067969] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available)
[   21.244130] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available)
Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts.
[   26.679709] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available)
executing program
[   26.775018] kasan: CONFIG_KASAN_INLINE enabled
[   26.779441] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   26.793399] Dumping ftrace buffer:
[   26.796906]    (ftrace buffer empty)
[   26.800581] Modules linked in:
[   26.803851] CPU: 1 PID: 3311 Comm: syzkaller159398 Not tainted 4.4.107-g610c835 #12
[   26.811607] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.820926] task: ffff8800b53817c0 task.stack: ffff8801d22b8000
[   26.826952] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   26.835178] RSP: 0018:ffff8801d22bfab0  EFLAGS: 00010a07
[   26.840590] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   26.847827] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   26.855061] RBP: ffff8801d22bfac0 R08: 0000000000000001 R09: 0000000000000000
[   26.862300] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   26.869538] R13: 0000000000000020 R14: ffff8801d0d60000 R15: dffffc0000000000
[   26.876775] FS:  0000000001b58880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   26.884971] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.890817] CR2: 0000000020001000 CR3: 00000001d2ea8000 CR4: 00000000001406e0
[   26.898075] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.905320] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.912577] Stack:
[   26.914697]  0000000000000000 ffff8801d0d60158 ffff8801d22bfb20 ffffffff825b8cf1
[   26.922642]  ffff8801d0d60170 ffffed003a1ac02b ffffed003a1ac02e ffff8801d0d60168
[   26.930603]  dead4ead00000000 ffff8801d0d60140 0000000000000000 0000000000000000
[   26.938548] Call Trace:
[   26.941106]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   26.947566]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   26.953590]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   26.959699]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   26.965636]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   26.970881]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   26.976648]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   26.983284]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   26.990264]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   26.996903]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   27.002319]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   27.008268]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   27.013688]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   27.019107]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   27.024959]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   27.031675]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   27.038394]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   27.044330]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   27.049573]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   27.054738]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   27.060411]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   27.066871]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   27.073412] 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 
[   27.099694] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.105574]  RSP <ffff8801d22bfab0>
[   27.109556] ---[ end trace 9b0bf43a831d2140 ]---
[   27.114317] Kernel panic - not syncing: Fatal exception
[   27.119699] Dumping ftrace buffer:
[   27.123209]    (ftrace buffer empty)
[   27.126883] Kernel Offset: disabled
[   27.130474] Rebooting in 86400 seconds..