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net test error: UBSAN: negation-overflow in corrupted

Status: upstream: reported on 2025/04/24 12:51
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+76fd07ed2518fb9303f9@syzkaller.appspotmail.com
First crash: 8h38m, last: 7h21m
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [kernel?] net test error: UBSAN: negation-overflow in corrupted 1 (2) 2025/04/24 12:55

Sample crash report:
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

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/24 11:32 net cc0dec3f659d 9c80ffa0 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce net test error: UBSAN: negation-overflow in corrupted
2025/04/24 10:16 net 4fe09ff1a54a 9c80ffa0 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce net test error: UBSAN: negation-overflow in corrupted
* Struck through repros no longer work on HEAD.