linux-kernel - Re: use-after-free in kmemleak

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Message-ID: <2023062958-twistable-rut-e684@gregkh>
Date:   Thu, 29 Jun 2023 08:56:57 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     liujf628995 <liujf628995@....com>
Cc:     catalin.marinas@....com, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        syzkaller@...glegroups.com, security@...nel.org,
        secalert@...hat.com
Subject: Re: use-after-free in kmemleak_scan？

On Thu, Jun 29, 2023 at 11:19:36AM +0800, liujf628995 wrote:
> hello,here is a crash from syzkaller,it looks like happened in kmemleak scan.It could not be reproduced by syzkaller because this should not have been caused by syscall fuzz.I don't know what rhe reason for this，please check it.My fuzzed linux kernel is linux-6.2（commit/c9c3395d5e3dcc6daee66c6908354d47bf98cb0c）

If you have a reproducer or a patch, we will be glad to review it,
otherwise just sending syzbot reports like this (especially in html
format which is rejected by the mailing lists), will not go very far as
we have loads of them already.

thanks,

greg k-h