[dpdk-dev] [PATCH v7] drivers/net: fix possible overflow using strlcat

[Ferruh Yigit]

On 3/18/2019 12:41 PM, Chaitanya Babu Talluri wrote:
> strcat does not check the destination length and there might be
> chances of string overflow so instead of strcat, strlcat is used.
> 
> Fixes: 540a211084 ("bnx2x: driver core")
> Fixes: e163c18a15 ("net/i40e: update ptype and pctype info")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Chaitanya Babu Talluri <tallurix.chaitanya.babu at intel.com>
> ---
> v7: Corrected title.
> v6: Updated title.
> v5: Removed strcat.
> v4: Corrected usage of strlcat.
> v3: Instead of strncat, used strlcat.
> v2: Instead of strncat, used snprintf.
> ---
>  drivers/net/bnx2x/bnx2x.c      | 5 +++--
>  drivers/net/i40e/i40e_ethdev.c | 4 ++--
>  2 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/bnx2x/bnx2x.c b/drivers/net/bnx2x/bnx2x.c
> index 26b3828e8..fe0db021c 100644
> --- a/drivers/net/bnx2x/bnx2x.c
> +++ b/drivers/net/bnx2x/bnx2x.c
> @@ -25,6 +25,7 @@
>  #include <sys/stat.h>
>  #include <fcntl.h>
>  #include <zlib.h>
> +#include <rte_string_fns.h>
>  
>  #define BNX2X_PMD_VER_PREFIX "BNX2X PMD"
>  #define BNX2X_PMD_VERSION_MAJOR 1
> @@ -11741,13 +11742,13 @@ static const char *get_bnx2x_flags(uint32_t flags)
>  
>  	for (i = 0; i < 5; i++)
>  		if (flags & (1 << i)) {
> -			strcat(flag_str, flag[i]);
> +			strlcat(flag_str, flag[i], sizeof(flag_str))

The patch doesn't compile because of the missing ';'
Can you please at least try to compile before sending the patch!