[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.084594] 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: [   20.420115] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   20.747103] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   21.552786] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available)
[   27.012512] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available)
Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts.
[   32.385045] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available)
executing program
[   32.485687] kasan: CONFIG_KASAN_INLINE enabled
[   32.490538] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   32.503320] Dumping ftrace buffer:
[   32.506822]    (ftrace buffer empty)
[   32.510496] Modules linked in:
[   32.513762] CPU: 0 PID: 3322 Comm: syzkaller974879 Not tainted 4.4.107-g610c835 #12
[   32.521517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.530837] task: ffff8800b55b4740 task.stack: ffff8801cf9f8000
[   32.536854] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   32.545085] RSP: 0018:ffff8801cf9ffab0  EFLAGS: 00010a07
[   32.550498] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   32.557730] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   32.564964] RBP: ffff8801cf9ffac0 R08: 0000000000000001 R09: 0000000000000000
[   32.572197] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   32.579432] R13: 0000000000000020 R14: ffff8801d0578000 R15: dffffc0000000000
[   32.586666] FS:  0000000001964880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   32.594856] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.600702] CR2: 0000000020001000 CR3: 00000001d5199000 CR4: 00000000001406f0
[   32.607938] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.615180] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.622414] Stack:
[   32.624524]  0000000000000000 ffff8801d0578158 ffff8801cf9ffb20 ffffffff825b8cf1
[   32.632463]  ffff8801d0578170 ffffed003a0af02b ffffed003a0af02e ffff8801d0578168
[   32.640409]  dead4ead00000000 ffff8801d0578140 0000000000000000 0000000000000000
[   32.648356] Call Trace:
[   32.650919]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   32.657373]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   32.663396]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   32.669502]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   32.675435]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   32.680680]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   32.686457]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   32.693092]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   32.700072]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   32.706707]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   32.712127]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   32.718065]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   32.723477]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   32.728896]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   32.734745]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   32.741461]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   32.748179]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   32.754121]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   32.759360]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   32.764514]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   32.770186]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   32.776641]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   32.783186] 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 
[   32.809454] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   32.815328]  RSP <ffff8801cf9ffab0>
[   32.819201] ---[ end trace 12ab2f49a90bff43 ]---
[   32.823928] Kernel panic - not syncing: Fatal exception
[   32.829614] Dumping ftrace buffer:
[   32.833120]    (ftrace buffer empty)
[   32.836803] Kernel Offset: disabled
[   32.840397] Rebooting in 86400 seconds..