Re: [PATCH 01/28] [v2] netfilter: nf_tables: avoid uninitialized variable warning

Pablo Neira Ayuso
2016-10-18T15:24:16Z

On Tue, Oct 18, 2016 at 12:05:30AM +0200, Arnd Bergmann wrote:
> The newly added nft_range_eval() function handles the two possible
> nft range operations, but as the compiler warning points out,
> any unexpected value would lead to the 'mismatch' variable being
> used without being initialized:
>
> net/netfilter/nft_range.c: In function 'nft_range_eval':
> net/netfilter/nft_range.c:45:5: error: 'mismatch' may be used uninitialized in this function [-Werror=maybe-uninitialized]
>
> This removes the variable in question and instead moves the
> condition into the switch itself, which is potentially more
> efficient than adding a bogus 'default' clause as in my
> first approach, and is nicer than using the 'uninitialized_var'
> macro.

Applied to the nf tree, thanks Arnd.