Re: [syzbot] [bcachefs?] KASAN: use-after-free Read in bch2_checksum

From: syzbot
Date: Sun Jun 22 2025 - 21:12:16 EST


syzbot suspects this issue was fixed by commit:

commit cd3cdb1ef706a1ac725194d81858d58375739b25
Author: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Date: Tue Apr 22 13:14:19 2025 +0000

bcachefs: Single err message for btree node reads

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=127d5b0c580000
start commit: d76bb1ebb558 Merge tag 'erofs-for-6.15-rc6-fixes' of git:/..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=b9683d529ec1b880
dashboard link: https://syzkaller.appspot.com/bug?extid=7d5c34b9ec9fe139fc0c
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=123544d4580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11870768580000

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

#syz fix: bcachefs: Single err message for btree node reads

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