patches for DPDK stable branches
 help / color / Atom feed
From: wangyunjian <wangyunjian@huawei.com>
To: Olivier Matz <olivier.matz@6wind.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
	"Lilijun (Jerry)" <jerry.lilijun@huawei.com>,
	xudingke <xudingke@huawei.com>,
	"stable@dpdk.org" <stable@dpdk.org>
Subject: [dpdk-stable] 答复: [dpdk-dev] [PATCH] kvargs: fix a heap-buffer-overflow when detect list
Date: Thu, 26 Mar 2020 10:01:23 +0000
Message-ID: <34EFBCA9F01B0748BEB6B629CE643AE60CF31E6C@dggemm513-mbx.china.huawei.com> (raw)
In-Reply-To: <20200325163142.GE17125@platinum>



> -----ÓʼþÔ­¼þ-----
> ·¢¼þÈË: Olivier Matz [mailto:olivier.matz@6wind.com]
> ·¢ËÍʱ¼ä: 2020Äê3ÔÂ26ÈÕ 0:32
> ÊÕ¼þÈË: wangyunjian <wangyunjian@huawei.com>
> ³­ËÍ: dev@dpdk.org; Lilijun (Jerry) <jerry.lilijun@huawei.com>; xudingke
> <xudingke@huawei.com>; stable@dpdk.org
> Ö÷Ìâ: Re: [dpdk-dev] [PATCH] kvargs: fix a heap-buffer-overflow when detect
> list
> 
> Hi,
> 
> On Thu, Mar 19, 2020 at 12:38:00PM +0800, wangyunjian wrote:
> > From: Yunjian Wang <wangyunjian@huawei.com>
> >
> > When an input params'value is '[', leading to the 'str' over read or
> > heap-buffer-overflow. So we can check the 'ctx1' length to avoid this
> > problem.
> >
> > Fixes: cc0579f2339a ("kvargs: support list value")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> > ---
> >  lib/librte_kvargs/rte_kvargs.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/lib/librte_kvargs/rte_kvargs.c
> > b/lib/librte_kvargs/rte_kvargs.c index d39332999..a1144b90b 100644
> > --- a/lib/librte_kvargs/rte_kvargs.c
> > +++ b/lib/librte_kvargs/rte_kvargs.c
> > @@ -48,7 +48,8 @@ rte_kvargs_tokenize(struct rte_kvargs *kvlist, const
> char *params)
> >  		str = kvlist->pairs[i].value;
> >  		if (str[0] == '[') {
> >  			/* Find the end of the list. */
> > -			while (str[strlen(str) - 1] != ']') {
> > +			while ((str[strlen(str) - 1] != ']') &&
> > +			       (strlen(ctx1) > 0)) {
> >  				/* Restore the comma erased by strtok_r(). */
> >  				str[strlen(str)] = ',';
> >  				/* Parse until next comma. */
> 
> I would prefer to keep the while condition as is, like this:
> 
>                                 /* Restore the comma erased by
> strtok_r(). */
> +                               if (ctx1[0] == '\0')
> +                                       return -1; /* no closing
> bracket
> + */
>                                 str[strlen(str)] = ',';
> 
> It avoids an uneeded call to strlen(), and ensure we are returning an error in
> that case.
> 
> I also wanted to add a test case, but I realized that kvargs unit tests are broken
> now. I have done 2 patches to fix them.
> 
> Do you mind if I send a patchset with these 2 patches + your patch (keeping
> your signed-off and doing the modification described above), to ensure there is
> no implicit dependency?

No, I don¡¯t mind. I agree with your view.

Thanks
Yunjian
> 
> Thanks,
> Olivier

  reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-19  4:38 [dpdk-stable] " wangyunjian
2020-03-25 16:31 ` Olivier Matz
2020-03-26 10:01   ` wangyunjian [this message]
2020-03-27  8:09 ` [dpdk-stable] [PATCH v2 0/3] kvargs fixes Olivier Matz
2020-03-27  8:09   ` [dpdk-stable] [PATCH v2 1/3] tests/kvargs: fix to consider empty elements as valid Olivier Matz
2020-03-27  8:09   ` [dpdk-stable] [PATCH v2 2/3] tests/kvargs: fix check of invalid cases Olivier Matz
2020-03-27  8:09   ` [dpdk-stable] [PATCH v2 3/3] kvargs: fix a heap buffer overflow when parsing list Olivier Matz
2020-03-27 15:16   ` [dpdk-stable] [PATCH v2 0/3] kvargs fixes David Marchand
2020-03-27 17:12     ` David Marchand

Reply instructions:

You may reply publically 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=34EFBCA9F01B0748BEB6B629CE643AE60CF31E6C@dggemm513-mbx.china.huawei.com \
    --to=wangyunjian@huawei.com \
    --cc=dev@dpdk.org \
    --cc=jerry.lilijun@huawei.com \
    --cc=olivier.matz@6wind.com \
    --cc=stable@dpdk.org \
    --cc=xudingke@huawei.com \
    /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

patches for DPDK stable branches

Archives are clonable:
	git clone --mirror http://inbox.dpdk.org/stable/0 stable/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 stable stable/ http://inbox.dpdk.org/stable \
		stable@dpdk.org
	public-inbox-index stable


Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.stable


AGPL code for this site: git clone https://public-inbox.org/ public-inbox