From: Leon Romanovsky <leon@kernel.org>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Doug Ledford <dledford@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Mark Bloch <markb@mellanox.com>,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: Re: [PATCH] RDMA/addr: potential uninitialized variable in ib_nl_process_good_ip_rsep()
Date: Sun, 4 Apr 2021 13:33:43 +0300 [thread overview]
Message-ID: <YGmWB4fT/8IFeiZf@unreal> (raw)
In-Reply-To: <YGcES6MsXGnh83qi@mwanda>
On Fri, Apr 02, 2021 at 02:47:23PM +0300, Dan Carpenter wrote:
> The nla_len() is less than or equal to 16. If it's less than 16 then
> end of the "gid" buffer is uninitialized.
>
> Fixes: ae43f8286730 ("IB/core: Add IP to GID netlink offload")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
> I just spotted this in review. I think it's a bug but I'm not 100%.
I tend to agree with you, that it is a bug.
LS_NLA_TYPE_DGID is declared as NLA_BINARY which doesn't complain if
data is less than declared ".len". However, the fix needs to be in
ib_nl_is_good_ip_resp(), it shouldn't return "true" if length not equal
to 16.
Thanks
next prev parent reply other threads:[~2021-04-04 10:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-02 11:47 [PATCH] RDMA/addr: potential uninitialized variable in ib_nl_process_good_ip_rsep() Dan Carpenter
2021-04-04 10:33 ` Leon Romanovsky [this message]
2021-04-04 13:13 ` Mark Bloch
2021-04-04 13:15 ` Leon Romanovsky
2021-04-05 5:41 ` Dan Carpenter
2021-04-05 5:52 ` Leon Romanovsky
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=YGmWB4fT/8IFeiZf@unreal \
--to=leon@kernel.org \
--cc=dan.carpenter@oracle.com \
--cc=dledford@redhat.com \
--cc=jgg@ziepe.ca \
--cc=kernel-janitors@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=markb@mellanox.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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox