[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   16.241971] 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: [   22.228207] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available)
[   22.680406] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available)
[   23.539787] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available)
[   46.518899] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available)
Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts.
[   51.891044] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available)
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[   51.998729] IPVS: Creating netns size=2552 id=1
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[   52.074991] kasan: CONFIG_KASAN_INLINE enabled
[   52.079421] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   52.092244] Dumping ftrace buffer:
[   52.095763]    (ftrace buffer empty)
[   52.099441] Modules linked in:
[   52.102709] CPU: 0 PID: 3338 Comm: syzkaller301007 Not tainted 4.4.107-g610c835 #4
[   52.110377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.119697] task: ffff8801d233df00 task.stack: ffff8801d13c0000
[   52.125718] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   52.133947] RSP: 0018:ffff8801d13c7970  EFLAGS: 00010a07
[   52.139357] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   52.146600] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   52.153835] RBP: ffff8801d13c7980 R08: 0000000000000001 R09: 0000000000000000
[   52.161072] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   52.168306] R13: 0000000000000020 R14: ffff8800b3da8000 R15: dffffc0000000000
[   52.175630] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008106840
[   52.183819] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   52.189668] CR2: 0000000020c3cfc0 CR3: 00000001d2e09000 CR4: 00000000001406f0
[   52.196908] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   52.204142] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   52.211377] Stack:
[   52.213488]  0000000000000000 ffff8800b3da8158 ffff8801d13c79e0 ffffffff825b8cf1
[   52.221429]  ffff8800b3da8170 ffffed00167b502b ffffed00167b502e ffff8800b3da8168
[   52.229374]  dead4ead00000000 ffff8800b3da8140 0000000000000000 0000000000000000
[   52.237318] Call Trace:
[   52.239873]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   52.246339]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   52.252370]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   52.258486]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   52.264422]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   52.269662]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   52.276291]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   52.281706]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   52.287556]  [<ffffffff8151b341>] do_loop_readv_writev+0x141/0x1e0
[   52.293838]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   52.300569]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   52.307199]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   52.313829]  [<ffffffff8151dedf>] compat_do_readv_writev+0x5df/0x6e0
[   52.320286]  [<ffffffff8151d900>] ? vfs_writev+0xb0/0xb0
[   52.325710]  [<ffffffff8377322c>] ? _raw_spin_unlock+0x2c/0x50
[   52.331647]  [<ffffffff8149e232>] ? handle_mm_fault+0x3f2/0x3190
[   52.337757]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   52.343692]  [<ffffffff8151e0b9>] compat_readv+0xd9/0x140
[   52.349200]  [<ffffffff81520448>] compat_SyS_readv+0xd8/0x1b0
[   52.355057]  [<ffffffff81520370>] ? SyS_pwritev+0x230/0x230
[   52.360736]  [<ffffffff81006b47>] ? do_fast_syscall_32+0xd7/0x890
[   52.366939]  [<ffffffff81520370>] ? SyS_pwritev+0x230/0x230
[   52.372615]  [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890
[   52.378727]  [<ffffffff837754d7>] sysenter_flags_fixed+0xd/0x17
[   52.384747] 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 
[   52.411015] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   52.416896]  RSP <ffff8801d13c7970>
[   52.420614] ---[ end trace f14f35ab1444a6a7 ]---
[   52.425374] Kernel panic - not syncing: Fatal exception
[   52.431082] Dumping ftrace buffer:
[   52.434592]    (ftrace buffer empty)
[   52.438270] Kernel Offset: disabled
[   52.441863] Rebooting in 86400 seconds..