Re: [syzbot] [bluetooth?] KASAN: null-ptr-deref Read in ida_free (4)

[Aleksandr Nogikh]

Looks reasonable, judging by the commit title.

#syz fix: ida: Fix crash in ida_free when the bitmap is empty


On Sun, Feb 11, 2024 at 10:55 AM syzbot
<syzbot+51baee846ddab52d5230@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit af73483f4e8b6f5c68c9aa63257bdd929a9c194a
> Author: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> Date:   Thu Dec 21 16:53:57 2023 +0000
>
>     ida: Fix crash in ida_free when the bitmap is empty
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12fc6ba2180000
> start commit:   b46ae77f6787 Merge tag 'xfs-6.7-fixes-3' of git://git.kern..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=6ae1a4ee971a7305
> dashboard link: https://syzkaller.appspot.com/bug?extid=51baee846ddab52d5230
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=127837cce80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12779dc8e80000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: ida: Fix crash in ida_free when the bitmap is empty
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>
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