linux-kernel - Re: [syzbot] [bcachefs] KASAN: use-after-free Read in scatterwalk

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Message-ID: <68128978.050a0220.3a872c.0008.GAE@google.com>
Date: Wed, 30 Apr 2025 13:35:04 -0700
From: syzbot <syzbot+8c4acf719c3fc41e8439@...kaller.appspotmail.com>
To: bfoster@...hat.com, davem@...emloft.net, herbert@...dor.apana.org.au, 
	kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	linux-crypto@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bcachefs] KASAN: use-after-free Read in scatterwalk_copychunks

syzbot suspects this issue was fixed by commit:

commit bcf77a05fb3d6210026483703bcacb22ed961c99
Author: Kent Overstreet <kent.overstreet@...ux.dev>
Date:   Fri Nov 8 05:25:18 2024 +0000

    bcachefs: Fix hidden btree errors when reading roots

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10dab1b3980000
start commit:   da4373fbcf00 Merge tag 'thermal-6.12-rc7' of git://git.ker..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=347f0ef7656eeb41
dashboard link: https://syzkaller.appspot.com/bug?extid=8c4acf719c3fc41e8439
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1579235f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1379235f980000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: bcachefs: Fix hidden btree errors when reading roots

For information about bisection process see: https://goo.gl/tpsmEJ#bisection