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From: "Gaëtan Rivet" <gaetan.rivet@6wind.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: dev@dpdk.org, wisamm@mellanox.com, stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] pci: fix parsing of address without function number
Date: Mon, 12 Nov 2018 10:29:05 +0100	[thread overview]
Message-ID: <20181112092905.g5vxszu5okxz4pzn@bidouze.vm.6wind.com> (raw)
In-Reply-To: <20181111235856.31429-1-thomas@monjalon.net>

On Mon, Nov 12, 2018 at 12:58:56AM +0100, Thomas Monjalon wrote:
> If the last part of the PCI address (function number) is missing,
> the parsing was successful, assuming function 0.
> The call to strtoul is not returning an error in such a case,
> so an explicit check is inserted before.
> 
> This bug has always been there in older parsing macros:
> 	- GET_PCIADDR_FIELD
> 	- GET_BLACKLIST_FIELD
> 

Returning 0, that's understandable, but errno not being set
is rather lame from strtoul.

> Fixes: af75078fece3 ("first public release")
> Cc: stable@dpdk.org
> 
> Reported-by: Wisam Jaddo <wisamm@mellanox.com>
> Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Gaetan Rivet <gaetan.rivet@6wind.com>

> ---
>  lib/librte_pci/rte_pci.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/lib/librte_pci/rte_pci.c b/lib/librte_pci/rte_pci.c
> index 530738dbd..f400178bb 100644
> --- a/lib/librte_pci/rte_pci.c
> +++ b/lib/librte_pci/rte_pci.c
> @@ -30,6 +30,10 @@ get_u8_pciaddr_field(const char *in, void *_u8, char dlm)
>  	uint8_t *u8 = _u8;
>  	char *end;
>  
> +	/* empty string is an error though strtoul() returns 0 */
> +	if (*in == '\0')
> +		return NULL;
> +
>  	errno = 0;
>  	val = strtoul(in, &end, 16);
>  	if (errno != 0 || end[0] != dlm || val > UINT8_MAX) {
> -- 
> 2.19.0
> 

-- 
Gaëtan Rivet
6WIND

  reply	other threads:[~2018-11-12  9:29 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-11 23:58 Thomas Monjalon
2018-11-12  9:29 ` Gaëtan Rivet [this message]
2018-11-13 17:00   ` Thomas Monjalon

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