All of lore.kernel.org
 help / color / mirror / Atom feed
From: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
To: u-boot@lists.denx.de
Subject: Double free vulnerability in do_rename_gpt_parts
Date: Fri, 17 Jan 2020 17:42:16 +0100	[thread overview]
Message-ID: <94cf8c43-260f-7d65-7def-a195c35ef967@gmail.com> (raw)
In-Reply-To: <20200117163149.GV8732@bill-the-cat>

Am 17.01.2020 um 17:31 schrieb Tom Rini:
> On Fri, Jan 17, 2020 at 04:29:52PM +0100, Simon Goldschmidt wrote:
>> + Some contributors of this file
>>
>> On Fri, Jan 17, 2020 at 1:03 PM Jordy <jordy@simplyhacker.com> wrote:
>>>
>>> Hello U-Boot lists!
>>>
>>> I think I found a double free bug in U-Boot, in /cmp/gpt.c in the function do_rename_gpt_parts().
>>>
>>> On line 702 the partition_list is being free'd if ret is smaller than 0.
>>> If the return value is not -ENOMEM it will go to the out: label and free the partition_list again.
>>
>> Reading the code, I can confirm that. Funny enough, the code in question was
>> introduced by commit 18030d04 ("GPT: fix memory leaks identified by Coverity").
>> Although I think Coverity should have detected the resulting double-free...
>>
>> However, I'm not sure of the fix: the code just continues for -ENOMEM and then
>> goes on using partitions_list at line 757...
> 
> So, Coverity later did complain about that change (but not immediately,
> funny enough).  I posted http://patchwork.ozlabs.org/patch/1192036/ and
> was hoping for a review on it as it's complex enough I'd like to avoid
> adding a 3rd round of issues there.  Thanks!
> 

Ah, yes. I've just responded there.

Regards,
Simon

  reply	other threads:[~2020-01-17 16:42 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-17 12:03 Double free vulnerability in do_rename_gpt_parts Jordy
2020-01-17 15:29 ` Simon Goldschmidt
2020-01-17 16:31   ` Tom Rini
2020-01-17 16:42     ` Simon Goldschmidt [this message]
2020-01-17 17:23     ` Jordy

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=94cf8c43-260f-7d65-7def-a195c35ef967@gmail.com \
    --to=simon.k.r.goldschmidt@gmail.com \
    --cc=u-boot@lists.denx.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.