[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.536351] 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: [   20.464803] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   20.812841] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   21.765837] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available)
[   21.943373] random: sshd: uninitialized urandom read (32 bytes read, 121 bits of entropy available)
Warning: Permanently added '10.128.15.230' (ECDSA) to the list of known hosts.
[   27.351832] random: sshd: uninitialized urandom read (32 bytes read, 125 bits of entropy available)
executing program
[   27.444259] kasan: CONFIG_KASAN_INLINE enabled
[   27.448681] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.461502] Dumping ftrace buffer:
[   27.465006]    (ftrace buffer empty)
[   27.468688] Modules linked in:
[   27.471959] CPU: 0 PID: 3325 Comm: syzkaller719712 Not tainted 4.4.107-g610c835 #12
[   27.479718] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.489038] task: ffff8801d2178000 task.stack: ffff8800b0e60000
[   27.495057] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.503290] RSP: 0018:ffff8800b0e67ab0  EFLAGS: 00010a07
[   27.508703] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   27.515936] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   27.523175] RBP: ffff8800b0e67ac0 R08: 0000000000000001 R09: 0000000000000000
[   27.530408] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   27.537643] R13: 0000000000000020 R14: ffff8801d22a0000 R15: dffffc0000000000
[   27.544878] FS:  0000000001d05880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   27.553065] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.558916] CR2: 0000000020001000 CR3: 00000001d1243000 CR4: 00000000001406f0
[   27.566152] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.573391] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.580624] Stack:
[   27.582737]  0000000000000000 ffff8801d22a0158 ffff8800b0e67b20 ffffffff825b8cf1
[   27.590686]  ffff8801d22a0170 ffffed003a45402b ffffed003a45402e ffff8801d22a0168
[   27.598624]  dead4ead00000000 ffff8801d22a0140 0000000000000000 0000000000000000
[   27.606565] Call Trace:
[   27.609118]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   27.615575]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   27.621597]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   27.627706]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   27.633640]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   27.638881]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   27.644646]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   27.651278]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   27.658260]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   27.664893]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   27.670306]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   27.676242]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   27.681655]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   27.687069]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   27.692917]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   27.699632]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   27.706348]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   27.712288]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   27.717533]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   27.722690]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   27.728365]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   27.734822]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   27.741367] 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 
[   27.767619] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.773494]  RSP <ffff8800b0e67ab0>
[   27.778181] ---[ end trace 9873c2455849b3cc ]---
[   27.782931] Kernel panic - not syncing: Fatal exception
[   27.788684] Dumping ftrace buffer:
[   27.792191]    (ftrace buffer empty)
[   27.795867] Kernel Offset: disabled
[   27.799460] Rebooting in 86400 seconds..