[   15.964953] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   19.989188] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   20.307212] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   20.986049] random: sshd: uninitialized urandom read (32 bytes read, 75 bits of entropy available)
[   21.166981] random: sshd: uninitialized urandom read (32 bytes read, 79 bits of entropy available)
Warning: Permanently added '10.128.0.59' (ECDSA) to the list of known hosts.
[   26.548107] random: sshd: uninitialized urandom read (32 bytes read, 86 bits of entropy available)
executing program
executing program
[   26.680044] kasan: CONFIG_KASAN_INLINE enabled
[   26.685169] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   26.697960] Dumping ftrace buffer:
[   26.701464]    (ftrace buffer empty)
[   26.705142] Modules linked in:
[   26.708414] CPU: 0 PID: 3313 Comm: syzkaller518114 Not tainted 4.4.107-g610c835 #12
[   26.716173] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.725493] task: ffff8800b55297c0 task.stack: ffff8801d0900000
[   26.731515] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   26.739739] RSP: 0018:ffff8801d09079f0  EFLAGS: 00010a07
[   26.745150] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   26.752385] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   26.759620] RBP: ffff8801d0907a00 R08: 0000000000000001 R09: 0000000000000000
[   26.766854] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   26.774089] R13: 0000000000000020 R14: ffff8801d0020000 R15: dffffc0000000000
[   26.781325] FS:  00007feb2d980700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   26.789516] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.795362] CR2: 0000000020cf1ff6 CR3: 00000001d1805000 CR4: 00000000001406f0
[   26.802598] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.809833] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.817065] Stack:
[   26.819179]  0000000000000000 ffff8801d0020158 ffff8801d0907a60 ffffffff825b8cf1
[   26.827128]  ffff8801d0020170 ffffed003a00402b ffffed003a00402e ffff8801d0020168
[   26.835081]  dead4ead00000000 ffff8801d0020140 0000000000000000 0000000000000000
[   26.843029] Call Trace:
[   26.845587]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   26.852043]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   26.858069]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   26.864182]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   26.870121]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   26.875365]  [<ffffffff81513314>] ? __check_object_size+0x154/0x35b
[   26.881734]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   26.889027]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   26.894444]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   26.900294]  [<ffffffff8151b341>] do_loop_readv_writev+0x141/0x1e0
[   26.906576]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   26.913294]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   26.919924]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   26.926554]  [<ffffffff8151d69d>] do_readv_writev+0x5dd/0x6e0
[   26.932403]  [<ffffffff8151d0c0>] ? vfs_write+0x530/0x530
[   26.937910]  [<ffffffff8157739b>] ? __fget+0x20b/0x3b0
[   26.943152]  [<ffffffff815773c2>] ? __fget+0x232/0x3b0
[   26.948394]  [<ffffffff815771d7>] ? __fget+0x47/0x3b0
[   26.953550]  [<ffffffff8151d818>] vfs_readv+0x78/0xb0
[   26.958705]  [<ffffffff8151fb69>] SyS_readv+0xd9/0x240
[   26.963946]  [<ffffffff8151fa90>] ? rw_copy_check_uvector+0x2d0/0x2d0
[   26.970491]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   26.976950]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   26.983489] 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 
[   27.009815] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   27.015690]  RSP <ffff8801d09079f0>
[   27.020902] ---[ end trace 193e9f5c3044fb37 ]---
[   27.026484] Kernel panic - not syncing: Fatal exception
[   27.032168] Dumping ftrace buffer:
[   27.035677]    (ftrace buffer empty)
[   27.039353] Kernel Offset: disabled
[   27.042943] Rebooting in 86400 seconds..