[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.419607] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   21.033573] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   21.282972] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   22.143080] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available)
[   22.313150] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available)
Warning: Permanently added '10.128.15.214' (ECDSA) to the list of known hosts.
[   27.705385] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available)
executing program
[   27.796283] kasan: CONFIG_KASAN_INLINE enabled
[   27.801058] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.813886] Dumping ftrace buffer:
[   27.817391]    (ftrace buffer empty)
[   27.821066] Modules linked in:
[   27.824333] CPU: 1 PID: 3311 Comm: syzkaller204042 Not tainted 4.4.107-g610c835 #12
[   27.832091] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.841513] task: ffff8801d230af80 task.stack: ffff8800b44f8000
[   27.847532] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.855756] RSP: 0018:ffff8800b44ffab0  EFLAGS: 00010a07
[   27.861167] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   27.868406] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   27.875644] RBP: ffff8800b44ffac0 R08: 0000000000000001 R09: 0000000000000000
[   27.882887] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   27.890135] R13: 0000000000000020 R14: ffff8800b4758000 R15: dffffc0000000000
[   27.897371] FS:  0000000001613880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   27.905562] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.911409] CR2: 0000000020671f39 CR3: 00000000b6fbb000 CR4: 00000000001406e0
[   27.918647] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.925886] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.933129] Stack:
[   27.935242]  0000000000000000 ffff8800b4758158 ffff8800b44ffb20 ffffffff825b8cf1
[   27.943182]  ffff8800b4758170 ffffed00168eb02b ffffed00168eb02e ffff8800b4758168
[   27.951126]  dead4ead00000000 ffff8800b4758140 0000000000000000 0000000000000000
[   27.959082] Call Trace:
[   27.961636]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   27.968098]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   27.974121]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   27.980236]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   27.986171]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   27.991411]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   27.997182]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.003819]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   28.010800]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.017431]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   28.022844]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   28.028780]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   28.034194]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   28.039620]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   28.045470]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   28.052189]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   28.058909]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   28.064844]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   28.070085]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   28.075238]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   28.080920]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   28.087378]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   28.093917] 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 
[   28.120174] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   28.126055]  RSP <ffff8800b44ffab0>
[   28.130042] ---[ end trace 84463bf08b777a73 ]---
[   28.134776] Kernel panic - not syncing: Fatal exception
[   28.140580] Dumping ftrace buffer:
[   28.144092]    (ftrace buffer empty)
[   28.147770] Kernel Offset: disabled
[   28.151375] Rebooting in 86400 seconds..