[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.145963] 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: [   20.827225] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   21.155998] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   21.848044] random: sshd: uninitialized urandom read (32 bytes read, 78 bits of entropy available)
[   23.196439] random: sshd: uninitialized urandom read (32 bytes read, 84 bits of entropy available)
Warning: Permanently added '10.128.0.61' (ECDSA) to the list of known hosts.
[   28.594702] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available)
executing program
[   28.706256] kasan: CONFIG_KASAN_INLINE enabled
[   28.710670] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.723769] Dumping ftrace buffer:
[   28.727272]    (ftrace buffer empty)
[   28.730946] Modules linked in:
[   28.734214] CPU: 1 PID: 3316 Comm: syzkaller295917 Not tainted 4.4.107-g610c835 #12
[   28.741973] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.751296] task: ffff8801d19d0000 task.stack: ffff8801d0478000
[   28.757315] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   28.765548] RSP: 0018:ffff8801d047fab0  EFLAGS: 00010a07
[   28.770962] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   28.778196] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   28.785431] RBP: ffff8801d047fac0 R08: 0000000000000001 R09: 0000000000000000
[   28.792663] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   28.799897] R13: 0000000000000020 R14: ffff8800b0e64200 R15: dffffc0000000000
[   28.807132] FS:  0000000001920880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   28.815322] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.821166] CR2: 000000002082bf88 CR3: 00000001d1294000 CR4: 00000000001406e0
[   28.828401] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.835637] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.842874] Stack:
[   28.844987]  0000000000000000 ffff8800b0e64358 ffff8801d047fb20 ffffffff825b8cf1
[   28.852941]  ffff8800b0e64370 ffffed00161cc86b ffffed00161cc86e ffff8800b0e64368
[   28.860883]  dead4ead00000000 ffff8800b0e64340 0000000000000000 0000000000000000
[   28.868826] Call Trace:
[   28.871382]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   28.877841]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   28.883865]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   28.889975]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   28.895912]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   28.901154]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   28.906916]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.913547]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   28.920526]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.927156]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   28.932568]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   28.938503]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   28.943914]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   28.949331]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   28.955182]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   28.961899]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   28.968617]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   28.974550]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   28.979793]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   28.984945]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   28.990621]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   28.997093]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   29.003635] 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 
[   29.029928] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   29.035808]  RSP <ffff8801d047fab0>
[   29.039750] ---[ end trace 46136361de268436 ]---
[   29.044487] Kernel panic - not syncing: Fatal exception
[   29.050255] Dumping ftrace buffer:
[   29.053765]    (ftrace buffer empty)
[   29.057438] Kernel Offset: disabled
[   29.061028] Rebooting in 86400 seconds..