Re: [PATCH] strtoul_ui: reject negative values

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Matthieu Moy <Matthieu.Moy@xxxxxxx> writes:

> This patch catches negative values before it's too late, i.e. before
> calling strtoul. We still silently accept very large integers that wrap
> to a valid "unsigned int".

Is the last statement correct?  A very large long uint that wrap to
uint would not fit in long uint and you would get ERANGE, no?

> So, here's a proper patch (I mean, a band-aid patch, but properly
> send ;-) ).

Yup.

> It should be merged before Kartik's series (or inserted at the start
> of the series) so that we get the fix before the test breakage.

Which one of his series?

>
>  git-compat-util.h | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/git-compat-util.h b/git-compat-util.h
> index f649e81..1df82fa 100644
> --- a/git-compat-util.h
> +++ b/git-compat-util.h
> @@ -814,6 +814,9 @@ static inline int strtoul_ui(char const *s, int base, unsigned int *result)
>  	char *p;
>  
>  	errno = 0;
> +	/* negative values would be accepted by strtoul */
> +	if (strchr(s, '-'))
> +		return -1;
>  	ul = strtoul(s, &p, base);
>  	if (errno || *p || p == s || (unsigned int) ul != ul)
>  		return -1;
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Kernel Development]     [Gcc Help]     [IETF Annouce]     [DCCP]     [Netdev]     [Networking]     [Security]     [V4L]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux SCSI]     [Fedora Users]