linux-kernel - kernel panic: Fatal exception (2)

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Date:   Sat, 25 Jul 2020 14:14:20 -0700
From:   syzbot <syzbot+c05fb1e489a39618f063@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: kernel panic: Fatal exception (2)

Hello,

syzbot found the following issue on:

HEAD commit:    de2e69cf Add linux-next specific files for 20200721
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10e0f437100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a18f913b3827a63a
dashboard link: https://syzkaller.appspot.com/bug?extid=c05fb1e489a39618f063
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16aaaa44900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16eee678900000

Bisection is inconclusive: the issue happens on the oldest tested release.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=110e6b7f100000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=130e6b7f100000
console output: https://syzkaller.appspot.com/x/log.txt?x=150e6b7f100000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c05fb1e489a39618f063@...kaller.appspotmail.com

R10: 0000000000000000 R11: 0000000000063688 R12: ffff88809f129000
R13: ffff8880a47e5000 R14: 0000000000008000 R15: ffffffff889943e0
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004553d0 CR3: 000000009cd20000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Kernel panic - not syncing: Fatal exception
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches