linux-kernel - [BUG] 6.18.rc6: git checkout consistently fail with invalid index-pack

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Message-ID: <CAOVeLGTwLZGVCoRvRq4pcMVeNBRhjv7CNBO0MSo5A75=wJPrhg@mail.gmail.com>
Date: Tue, 18 Nov 2025 10:41:29 -0800
From: Donald <sirspudd@...il.com>
To: LKML <linux-kernel@...r.kernel.org>
Subject: [BUG] 6.18.rc6: git checkout consistently fail with invalid index-pack

I started seeing weird behavior on git checkouts after 6.18.rc4

git clone https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
linux-new
Cloning into 'linux-new'...
remote: Enumerating objects: 11158539, done.
remote: Counting objects: 100% (144/144), done.
remote: Compressing objects: 100% (108/108), done.
fatal: fetch-pack: invalid index-pack output.68 MiB | 36.67 MiB/s

I was cloning a new linux repo, as my existing repo was seizing when
trying to fetch and git fsck was segfaulting:

git fsck --full
Checking ref database: 100% (1/1), done.
Checking object directories: 100% (256/256), done. [1] 9589
segmentation fault (core dumped) git fsck --full

and compile medium sized c++ tasks was also seizing indefinitely with
moderate cpu usage.

I removed all adjustment to my kernel to basically stock build/cmdline
args and the issue persisted.

Falling back to 6.17.8-arch1-1 made all issues go away.

Yours sincerely,
Donald

-- 
-------------------------------
 °v°  Donald Carr
/(_)\ Chaos Reins
^ ^   http://chaos-reins.com/