From: Alejandro Lucero <alejandro.lucero@netronome.com>
To: Andy Green <andy@warmcat.com>
Cc: dev <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2 06/18] drivers/net/nfp/nfpcore: fix off-by-one and no NUL on strncpy use
Date: Wed, 9 May 2018 10:53:46 +0100 [thread overview]
Message-ID: <CAD+H991x-ePULvP1ccoahg8riSHhWorckLdRif9KsTxJ=O2Uww@mail.gmail.com> (raw)
In-Reply-To: <152582948090.6809.17293544631396610744.stgit@localhost.localdomain>
On Wed, May 9, 2018 at 2:31 AM, Andy Green <andy@warmcat.com> wrote:
> /home/agreen/projects/dpdk/drivers/net/nfp/nfpcore/nfp_resource.c:
> 76:2:error: ‘strncpy’ output may be truncated copying 8 bytes from
> a string of length 8 [-Werror=stringop-truncation]
> strncpy(name_pad, res->name, sizeof(name_pad));
>
> Signed-off-by: Andy Green <andy@warmcat.com>
> ---
> drivers/net/nfp/nfpcore/nfp_resource.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/nfp/nfpcore/nfp_resource.c
> b/drivers/net/nfp/nfpcore/nfp_resource.c
> index e1df2b2e1..a165b93df 100644
> --- a/drivers/net/nfp/nfpcore/nfp_resource.c
> +++ b/drivers/net/nfp/nfpcore/nfp_resource.c
> @@ -7,6 +7,8 @@
> #include <time.h>
> #include <endian.h>
>
> +#include <rte_string_fns.h>
> +
> #include "nfp_cpp.h"
> #include "nfp6000/nfp6000.h"
> #include "nfp_resource.h"
> @@ -65,15 +67,15 @@ struct nfp_resource {
> static int
> nfp_cpp_resource_find(struct nfp_cpp *cpp, struct nfp_resource *res)
> {
> - char name_pad[NFP_RESOURCE_ENTRY_NAME_SZ] = {};
> + char name_pad[NFP_RESOURCE_ENTRY_NAME_SZ + 2];
> struct nfp_resource_entry entry;
> uint32_t cpp_id, key;
> int ret, i;
>
> cpp_id = NFP_CPP_ID(NFP_RESOURCE_TBL_TARGET, 3, 0); /* Atomic
> read */
>
> - memset(name_pad, 0, NFP_RESOURCE_ENTRY_NAME_SZ);
> - strncpy(name_pad, res->name, sizeof(name_pad));
> + memset(name_pad, 0, sizeof(name_pad));
> + strlcpy(name_pad, res->name, sizeof(name_pad));
>
> /* Search for a matching entry */
> if (!memcmp(name_pad, NFP_RESOURCE_TBL_NAME "\0\0\0\0\0\0\0\0",
> 8)) {
>
>
I'm afraid this patch is breaking the PMD NFP initialization. It is due to
how the name pad is used for getting a key which is compared against a key
generated by the firmware.
Because the name_pad size change, this next change is also required:
- key = nfp_crc32_posix(name_pad, sizeof(name_pad));
+ key = nfp_crc32_posix(name_pad, NFP_RESOURCE_ENTRY_NAME_SZ);
next prev parent reply other threads:[~2018-05-09 9:53 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-09 1:30 [dpdk-dev] [PATCH v2 00/18] Fix build on gcc8 and various bugs Andy Green
2018-05-09 1:30 ` [dpdk-dev] [PATCH v2 01/18] lib/libtre_table: workaround hash function cast error Andy Green
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 02/18] drivers/bus/pci: fix strncpy dangerous code Andy Green
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 03/18] drivers/bus/dpaa: fix inconsistent struct alignment Andy Green
2018-05-09 8:06 ` Hemant Agrawal
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 04/18] drivers/net/axgbe: fix broken eeprom string comp Andy Green
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 05/18] drivers/net/nfp/nfpcore: fix strncpy misuse Andy Green
2018-05-09 9:49 ` Alejandro Lucero
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 06/18] drivers/net/nfp/nfpcore: fix off-by-one and no NUL on strncpy use Andy Green
2018-05-09 9:53 ` Alejandro Lucero [this message]
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 07/18] drivers/net/nfp: don't memcpy out of source range Andy Green
2018-05-09 9:54 ` Alejandro Lucero
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 08/18] drivers/net/nfp: fix buffer overflow in fw_name Andy Green
2018-05-09 10:04 ` Alejandro Lucero
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 09/18] drivers/net/qede: fix strncpy constant and NUL Andy Green
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 10/18] drivers/net/qede: fix broken strncpy Andy Green
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 11/18] drivers/net/sfc: fix strncpy length Andy Green
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 12/18] drivers/net/sfc: fix strncpy size and NUL Andy Green
2018-05-09 1:31 ` [dpdk-dev] [PATCH v2 13/18] drivers/net/vdev: readlink inputs cannot be aliased Andy Green
2018-05-09 15:33 ` Stephen Hemminger
2018-05-09 1:32 ` [dpdk-dev] [PATCH v2 14/18] drivers/net/vdev: fix 3 x strncpy misuse Andy Green
2018-05-09 1:32 ` [dpdk-dev] [PATCH v2 15/18] app/test-pmd: can't find include Andy Green
2018-05-09 1:32 ` [dpdk-dev] [PATCH v2 16/18] app/proc-info: fix sprintf overrun bug Andy Green
2018-05-09 1:32 ` [dpdk-dev] [PATCH v2 17/18] app/test-bbdev: test-bbdev: strcpy ok for allocated string Andy Green
2018-05-09 1:32 ` [dpdk-dev] [PATCH v2 18/18] app/test-bbdev: " Andy Green
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