unexpected kernel reboot

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: a844dc4c Linux 4.14.158
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13f65446e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=c02bef505ffc02ff
dashboard link: https://syzkaller.appspot.com/bug?extid=987fbdc23e2164f86d8e
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+987fbd...@syzkaller.appspotmail.com

input_len: 0x0000000002b32029
output: 0x0000000001000000
output_len: 0x0000000008284a48
kernel_total_size: 0x0000000009592000
Decompressing Linux... Parsing ELF... done.
Booting the kernel.


---
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[syzbot]

syzbot has found a reproducer for the following crash on:

HEAD commit: a844dc4c Linux 4.14.158
git tree: linux-4.14.y

console output: https://syzkaller.appspot.com/x/log.txt?x=17808e61e00000

kernel config: https://syzkaller.appspot.com/x/.config?x=c02bef505ffc02ff
dashboard link: https://syzkaller.appspot.com/bug?extid=987fbdc23e2164f86d8e
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c28b41e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=174e052ee00000