[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   18.340586] 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: [   20.533928] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   20.788532] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   21.624775] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available)
[   21.774942] random: sshd: uninitialized urandom read (32 bytes read, 121 bits of entropy available)
Warning: Permanently added '10.128.15.201' (ECDSA) to the list of known hosts.
[   27.140495] random: nonblocking pool is initialized
executing program
[   27.227325] kasan: CONFIG_KASAN_INLINE enabled
[   27.231759] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.245034] Dumping ftrace buffer:
[   27.248541]    (ftrace buffer empty)
[   27.252222] Modules linked in:
[   27.255504] CPU: 0 PID: 3771 Comm: syzkaller895036 Not tainted 4.4.115-g0e9bcc1 #11
[   27.263264] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.272610] task: ffff8801c6cc4800 task.stack: ffff8800b26d0000
[   27.278634] RIP: 0010:[<ffffffff814348a1>]  [<ffffffff814348a1>] __free_pages+0x21/0x90
[   27.286872] RSP: 0018:ffff8800b26d7ab0  EFLAGS: 00010a07
[   27.292304] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b872b
[   27.299544] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   27.306783] RBP: ffff8800b26d7ac0 R08: 0000000000000000 R09: 0000000000000000
[   27.314021] R10: 0000000000000000 R11: 1ffff100164daf36 R12: 0000000000000004
[   27.321260] R13: 0000000000000020 R14: ffff8800ab6ba100 R15: dffffc0000000000
[   27.328512] FS:  0000000000d70880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   27.336706] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.342574] CR2: 0000000020a2f000 CR3: 00000000bb9e8000 CR4: 0000000000160670
[   27.349824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.357073] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.364323] Stack:
[   27.366439]  0000000000000000 ffff8800ab6ba258 ffff8800b26d7b20 ffffffff825b8751
[   27.374412]  ffff8800ab6ba270 ffffed00156d744b ffffed00156d744e ffff8800ab6ba268
[   27.382394]  dead4ead00000000 ffff8800ab6ba240 0000000000000000 0000000000000000
[   27.390354] Call Trace:
[   27.392918]  [<ffffffff825b8751>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   27.399391]  [<ffffffff825b8b15>] sg_finish_rem_req+0x2b5/0x340
[   27.405420]  [<ffffffff825b8bd9>] sg_new_read.isra.18+0x39/0x3c0
[   27.411533]  [<ffffffff825b6ed2>] ? sg_get_rq_mark+0x142/0x190
[   27.417473]  [<ffffffff825ba83c>] sg_read+0x8bc/0x1490
[   27.422719]  [<ffffffff825b9f80>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   27.429368]  [<ffffffff8144a584>] ? __lru_cache_add+0x164/0x240
[   27.435397]  [<ffffffff8150e219>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   27.442380]  [<ffffffff825b9f80>] ? sg_proc_seq_show_debug+0xda0/0xda0
[   27.449015]  [<ffffffff8151cfd3>] __vfs_read+0x103/0x440
[   27.454436]  [<ffffffff8151ced0>] ? vfs_iter_write+0x2d0/0x2d0
[   27.460388]  [<ffffffff815e982d>] ? fsnotify+0x5ad/0xee0
[   27.465810]  [<ffffffff815ea160>] ? fsnotify+0xee0/0xee0
[   27.471230]  [<ffffffff81b4cfc9>] ? avc_policy_seqno+0x9/0x20
[   27.477097]  [<ffffffff81b5e698>] ? selinux_file_permission+0x348/0x460
[   27.483821]  [<ffffffff81b43ec9>] ? security_file_permission+0x89/0x1e0
[   27.490543]  [<ffffffff8151eb60>] ? rw_verify_area+0x100/0x2f0
[   27.496492]  [<ffffffff8151ee73>] vfs_read+0x123/0x3a0
[   27.501747]  [<ffffffff815217b9>] SyS_read+0xd9/0x1b0
[   27.506906]  [<ffffffff815216e0>] ? do_sendfile+0xd30/0xd30
[   27.512589]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   27.519052]  [<ffffffff8377451f>] entry_SYSCALL_64_fastpath+0x1c/0x98
[   27.525599] 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 
[   27.552212] RIP  [<ffffffff814348a1>] __free_pages+0x21/0x90
[   27.558101]  RSP <ffff8800b26d7ab0>
[   27.562092] ---[ end trace 916b157467f0c4d9 ]---
[   27.567691] Kernel panic - not syncing: Fatal exception
[   27.573475] Dumping ftrace buffer:
[   27.576986]    (ftrace buffer empty)
[   27.580669] Kernel Offset: disabled
[   27.584263] Rebooting in 86400 seconds..