linux-kernel - Re: [syzbot] [mm?] KASAN: slab-out-of-bounds Read in mt_validate

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Message-ID: <00000000000040996a0603567d52@google.com>
Date:   Sun, 20 Aug 2023 01:24:23 -0700
From:   syzbot <syzbot+609e63261638ff3d5436@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, ghandatmanas@...il.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        syzkaller-bugs@...glegroups.com, syzkaller@...glegroups.com,
        torvalds@...ux-foundation.org
Subject: Re: [syzbot] [mm?] KASAN: slab-out-of-bounds Read in mt_validate_nulls

syzbot suspects this issue was fixed by commit:

commit ae80b404198434e49e903dc3b1ba83e2c7bb3ee2
Author: Linus Torvalds <torvalds@...ux-foundation.org>
Date:   Mon Jul 3 17:08:50 2023 +0000

    mm: validate the mm before dropping the mmap lock

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17b0da65a80000
start commit:   a901a3568fd2 Merge tag 'iomap-6.5-merge-1' of git://git.ke..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=7406f415f386e786
dashboard link: https://syzkaller.appspot.com/bug?extid=609e63261638ff3d5436
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10342968a80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17d4cf70a80000

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

#syz fix: mm: validate the mm before dropping the mmap lock

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