linux-kernel - Re: [syzbot] [ntfs3?] KASAN: slab-use-after-free Read in ntfs_write

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Date:   Tue, 26 Sep 2023 19:49:26 -0700
From:   syzbot <syzbot+bc79f8d1898960d41073@...kaller.appspotmail.com>
To:     almaz.alexandrovich@...agon-software.com, brauner@...nel.org,
        hch@....de, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        nathan@...nel.org, ndesaulniers@...gle.com, ntfs3@...ts.linux.dev,
        syzkaller-bugs@...glegroups.com, trix@...hat.com,
        viro@...iv.linux.org.uk
Subject: Re: [syzbot] [ntfs3?] KASAN: slab-use-after-free Read in ntfs_write_bh

syzbot has bisected this issue to:

commit 5f0fb2210bb34ecd3f7bfde0d8f0068b79b2e094
Author: Christoph Hellwig <hch@....de>
Date:   Wed Aug 9 22:05:44 2023 +0000

    ntfs3: don't call sync_blockdev in ntfs_put_super

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1671b51e680000
start commit:   6465e260f487 Linux 6.6-rc3
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1571b51e680000
console output: https://syzkaller.appspot.com/x/log.txt?x=1171b51e680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bb54ecdfa197f132
dashboard link: https://syzkaller.appspot.com/bug?extid=bc79f8d1898960d41073
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14aa4e32680000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=171787b6680000

Reported-by: syzbot+bc79f8d1898960d41073@...kaller.appspotmail.com
Fixes: 5f0fb2210bb3 ("ntfs3: don't call sync_blockdev in ntfs_put_super")

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