Re: [syzbot] [ext4?] KASAN: use-after-free Read in ext4_find_extent (3)

From: syzbot
Date: Sat Jan 27 2024 - 04:05:19 EST


syzbot suspects this issue was fixed by commit:

commit 6f861765464f43a71462d52026fbddfc858239a5
Author: Jan Kara <jack@xxxxxxx>
Date: Wed Nov 1 17:43:10 2023 +0000

fs: Block writes to mounted block devices

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17b36eefe80000
start commit: c42d9eeef8e5 Merge tag 'hardening-v6.7-rc2' of git://git.k..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=d05dd66e2eb2c872
dashboard link: https://syzkaller.appspot.com/bug?extid=7ec4ebe875a7076ebb31
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1585ea50e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=157ef53f680000

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

#syz fix: fs: Block writes to mounted block devices

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