linux-kernel - Re: [PATCH] bcachefs:fix use-after-free in __bch2_bkey_fsck

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Message-ID: <nsj65dhgvhta45hng2ouj2vq4hclu52bdvlkvpzbucgmkqmacb@w4g5qzmqr5of>
Date: Sun, 5 Oct 2025 14:05:33 -0400
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: SHAURYA RANE <ssrane_b23@...vjti.ac.in>
Cc: linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzbot+55c84106264e92ea9ada@...kaller.appspotmail.com, syzbot+564efbe31172fe908429@...kaller.appspotmail.com
Subject: Re: [PATCH] bcachefs:fix use-after-free in __bch2_bkey_fsck_err

On Sun, Oct 05, 2025 at 09:38:25PM +0530, SHAURYA RANE wrote:
> #syz test:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

Instead of having syzbot test your code, please try the ktest syzbot
reproducer test:

https://evilpiepirate.org/git/ktest.git/

build-test-kernel run -I ~/ktest/tests/syzbot-repro.ktest <bug-id>

I get very nervous when people send me patches they've never run
themselves. Always try to have eyes on what your code is doing, try to
look with your eyes and see that it's doing what you think it's doing :)