linux-kernel - Re: [PATCH net V2] net: pds_core: Fix possible double free in error handling path

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <9c4da99a83bceb4680aac9588151cc8190ff07e0.camel@redhat.com>
Date: Tue, 05 Mar 2024 15:58:37 +0100
From: Paolo Abeni <pabeni@...hat.com>
To: hyper <hyperlyzcs@...il.com>, shannon.nelson@....com,
 brett.creeley@....com,  davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 jitxie@...cent.com,  huntazhang@...cent.com
Subject: Re: [PATCH net V2] net: pds_core: Fix possible double free in error
 handling path

On Sun, 2024-03-03 at 16:49 +0800, hyper wrote:
> When auxiliary_device_add() returns error and then calls
> auxiliary_device_uninit(), Callback function pdsc_auxbus_dev_release
> calls kfree(padev) to free memory. We shouldn't call kfree(padev)
> again in the error handling path.
> 
> Fix this by cleaning up the redundant kfree() and putting
> the error handling back to where the errors happened.
> 
> Fixes: 4569cce43bc6 ("pds_core: add auxiliary_bus devices")
> Signed-off-by: hyper <hyperlyzcs@...il.com>

Note that submitters are required to use real identity:

https://elixir.bootlin.com/linux/v6.8-rc7/source/Documentation/process/submitting-patches.rst#L438

Could you please repost avoiding the nick name?

You can retain the already collected acks.

Thanks,

Paolo