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From: Tiwei Bie <tiwei.bie@intel.com>
To: Mohammad Abdul Awal <mohammad.abdul.awal@intel.com>
Cc: dev@dpdk.org, maxime.coquelin@redhat.com, zhihong.wang@intel.com,
	stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2] vhost: fix null pointer checking
Date: Mon, 8 Apr 2019 11:38:45 +0800	[thread overview]
Message-ID: <20190408033845.GC20719@dpdk-tbie.sh.intel.com> (raw)
Message-ID: <20190408033845._uo9Jsalbtq7gg1etDjeVbxsmaDijfbGXI8rbOAv-y0@z> (raw)
In-Reply-To: <20190404085317.32337-1-mohammad.abdul.awal@intel.com>

On Thu, Apr 04, 2019 at 09:53:17AM +0100, Mohammad Abdul Awal wrote:
> Null value for parameters will cause segfault.
> 
> Fixes: d7280c9fff ("vhost: support selective datapath")
> Fixes: 72e8543093df ("vhost: add API to get MTU value")
> Fixes: a277c71598 ("vhost: refactor code structure")
> Fixes: ca33faf9ef ("vhost: introduce API to fetch negotiated features")
> Fixes: eb32247457 ("vhost: export guest memory regions")
> Fixes: 40ef286f23 ("vhost: export vhost vring info")
> Fixes: bd2e0c3fe5 ("vhost: add APIs for live migration")
> Fixes: 0b8572a0c1 ("vhost: add external message handling to the API")
> Fixes: b4953225ce ("vhost: add APIs for datapath configuration")

Would be better to use the same length (12) for hashes.

> Cc: stable@dpdk.org
> 
> Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal@intel.com>
> ---
>  lib/librte_vhost/socket.c |  2 +-
>  lib/librte_vhost/vdpa.c   |  5 ++++-
>  lib/librte_vhost/vhost.c  | 16 ++++++++--------
>  3 files changed, 13 insertions(+), 10 deletions(-)
> 
> diff --git a/lib/librte_vhost/socket.c b/lib/librte_vhost/socket.c
> index 3da9de62c..a89665946 100644
> --- a/lib/librte_vhost/socket.c
> +++ b/lib/librte_vhost/socket.c
> @@ -562,7 +562,7 @@ rte_vhost_driver_attach_vdpa_device(const char *path, int did)
>  {
>  	struct vhost_user_socket *vsocket;
>  
> -	if (rte_vdpa_get_device(did) == NULL)
> +	if (rte_vdpa_get_device(did) == NULL || path == NULL)

There are multiple APIs accepting `path` parameter without
validating it in socket.c. I meant we can do the check for
most of them in find_vhost_user_socket():

https://github.com/DPDK/dpdk/blob/bdcfcceb7a0b7534a0dba669279d18bd0f98d5e5/lib/librte_vhost/socket.c#L546

For the cases which can't be covered by the check in
find_vhost_user_socket(), we need to do the check separately,
e.g.:

https://github.com/DPDK/dpdk/blob/bdcfcceb7a0b7534a0dba669279d18bd0f98d5e5/lib/librte_vhost/socket.c#L972


For the rest,
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>

Thanks!
Tiwei

  parent reply	other threads:[~2019-04-08  3:39 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-04  8:53 Mohammad Abdul Awal
2019-04-04  8:53 ` Mohammad Abdul Awal
2019-04-08  3:38 ` Tiwei Bie [this message]
2019-04-08  3:38   ` Tiwei Bie
2019-04-17  7:13   ` Maxime Coquelin
2019-04-17  7:13     ` Maxime Coquelin

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