[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   15.943760] 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: [   21.387734] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   21.681227] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   22.423974] random: sshd: uninitialized urandom read (32 bytes read, 89 bits of entropy available)
[   47.977423] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available)
Warning: Permanently added '10.128.0.31' (ECDSA) to the list of known hosts.
[   53.359805] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available)
executing program
[   53.456460] kasan: CONFIG_KASAN_INLINE enabled
[   53.461408] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   53.474198] Dumping ftrace buffer:
[   53.477705]    (ftrace buffer empty)
[   53.481379] Modules linked in:
[   53.484654] CPU: 0 PID: 3332 Comm: syzkaller299529 Not tainted 4.4.107-g610c835 #12
[   53.492412] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.501745] task: ffff8801d09fc740 task.stack: ffff8801d1b18000
[   53.507768] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   53.515999] RSP: 0018:ffff8801d1b1fab0  EFLAGS: 00010a07
[   53.521425] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   53.528662] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   53.535900] RBP: ffff8801d1b1fac0 R08: 0000000000000001 R09: 0000000000000000
[   53.543137] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   53.550385] R13: 0000000000000020 R14: ffff8801cfdc4200 R15: dffffc0000000000
[   53.557625] FS:  00000000014c0880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   53.565819] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   53.571675] CR2: 0000000020001000 CR3: 00000001d1068000 CR4: 00000000001406f0
[   53.578915] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   53.586161] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   53.593398] Stack:
[   53.595522]  0000000000000000 ffff8801cfdc4358 ffff8801d1b1fb20 ffffffff825b8cf1
[   53.603482]  ffff8801cfdc4370 ffffed0039fb886b ffffed0039fb886e ffff8801cfdc4368
[   53.611432]  dead4ead00000000 ffff8801cfdc4340 0000000000000000 0000000000000000
[   53.619386] Call Trace:
[   53.621946]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   53.628414]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   53.634440]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   53.640549]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   53.646487]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   53.651732]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   53.657496]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   53.664138]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   53.671125]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   53.677755]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   53.683170]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   53.689104]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   53.694517]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   53.699937]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   53.705789]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   53.712509]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   53.719226]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   53.725164]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   53.730406]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   53.735561]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   53.741239]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   53.747699]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   53.754244] 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 
[   53.780601] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   53.786484]  RSP <ffff8801d1b1fab0>
[   53.793826] ---[ end trace 8d7aa2be22eca6ad ]---
[   53.798571] Kernel panic - not syncing: Fatal exception
[   53.804276] Dumping ftrace buffer:
[   53.807804]    (ftrace buffer empty)
[   53.811483] Kernel Offset: disabled
[   53.815080] Rebooting in 86400 seconds..