linux-kernel - [syzbot] [kernel?] net test error: UBSAN: negation-overflow in corrupted

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Message-ID: <680a33d5.050a0220.10d98e.0006.GAE@google.com>
Date: Thu, 24 Apr 2025 05:51:33 -0700
From: syzbot <syzbot+76fd07ed2518fb9303f9@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, davem@...emloft.net, kuba@...nel.org, 
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [kernel?] net test error: UBSAN: negation-overflow in corrupted

Hello,

syzbot found the following issue on:

HEAD commit:    cc0dec3f659d Merge branch 'net-stmmac-fix-timestamp-snapsh..
git tree:       net
console output: https://syzkaller.appspot.com/x/log.txt?x=131c21b3980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ac0f76cd0f8e093a
dashboard link: https://syzkaller.appspot.com/bug?extid=76fd07ed2518fb9303f9
compiler:       Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1d6f321414b4/disk-cc0dec3f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/072c28c931b0/vmlinux-cc0dec3f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bcb44ff40c55/bzImage-cc0dec3f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+76fd07ed2518fb9303f9@...kaller.appspotmail.com

virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f27f0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
[    0serialport: Connected to syzkaller.us-central1-c.ci-upstream-net-this-kasan-gce-test-1 port 1 (session ID: e72bd3249fa5f4b40b974e21e6d99e16e8384254f2e85c0fe39918dcc479fa4d, active connections: 1).
.000000][    T0] UBSAN: negation-overflow in lib/sort.c:199:36


---
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