[PATCH v3] env: mmc: Correct partition comparison in mmc_offset_try_partition

[Hoyeonjiki Kim]

Jaehoon Chung,

On Mon, Nov 16, 2020 at 7:35 AM Jaehoon Chung <jh80.chung at samsung.com> wrote:
>
> Dear Hoyeonjiki,
>
> On 11/16/20 2:25 AM, Hoyeonjiki Kim wrote:
> > The function mmc_offset_try_partition searches the MMC partition for
> > locating environment data, by comparing the partition names with config
> > "u-boot,mmc-env-parition". However, it only compares the first word-size
> > bytes (size of 'const char *'), which may make the function to find
> > unintended partition.
> >
> > Correct the function not to partially compare the partition name with
> > config "u-boot,mmc-env-partition".
> >
> > Fixes: c9e87ba66540 ("env: Save environment at the end of an MMC partition")
> > Signed-off-by: Hoyeonjiki Kim <jigi.kim at gmail.com>
> > Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>
> > Reviewed-by: Jorge Ramire-Ortiz <jramirez at baylibre.com>
> > Reviewed-by: Wolfgang Denk <wd at denx.de>
>
> Nobody replied with reviewed-by tag.
> Don't add reviewed-by tag yourself.
>
> Best Regards,
> Jaehoon Chung

Seems I misunderstood how it works...
Thanks for letting me know.
I will resend my patch with those reviewed-by tags.

Best Regards,
Hoyeonjiki Kim

>
> > ---
> >  env/mmc.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/env/mmc.c b/env/mmc.c
> > index 4e67180b23..ee376c3e0c 100644
> > --- a/env/mmc.c
> > +++ b/env/mmc.c
> > @@ -42,7 +42,7 @@ static inline int mmc_offset_try_partition(const char *str, int copy, s64 *val)
> >               if (ret < 0)
> >                       return ret;
> >
> > -             if (!strncmp((const char *)info.name, str, sizeof(str)))
> > +             if (!strncmp((const char *)info.name, str, sizeof(info.name)))
> >                       break;>         }
> >
> >
>