linux-kernel - Re: [PATCH] jfs : fix shift-out-of-bounds in dbUpdatePMap

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Message-ID: <19d0fde9-8a56-41f3-a898-c10f18b79b1e@oracle.com>
Date:   Wed, 30 Aug 2023 15:20:07 -0500
From:   Dave Kleikamp <dave.kleikamp@...cle.com>
To:     Manas Ghandat <ghandatmanas@...il.com>, liushixin2@...wei.com
Cc:     jfs-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
        Linux-kernel-mentees@...ts.linuxfoundation.org,
        syzbot+91ad2b52815a08caf4ea@...kaller.appspotmail.com
Subject: Re: [PATCH] jfs : fix shift-out-of-bounds in dbUpdatePMap

Thanks for verifying!

On 8/30/23 11:58AM, Manas Ghandat wrote:
> I checked for the v6.5. Its fixed there.
> 
> On 29/08/23 23:19, Dave Kleikamp wrote:
>> On 8/27/23 12:05AM, Manas Ghandat wrote:
>>> Currently there is no bound check for number of logical blocks per
>>> page (bmp->db_l2nbperpage). Added the required bound check for the
>>> calculation of dmap.
>>
>> This should already be fixed by 11509910c599 ("jfs: jfs_dmap: Validate 
>> db_l2nbperpage while mounting")
>>
>> Can you please verify if this problem still exists in v6.5?
>>
>> Shaggy
>>