Re: [PATCH] [rfc, netfilter-next] netfilter: nf_tables: fib warnings

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Arnd Bergmann <arnd@xxxxxxxx> wrote:
> The newly added nft fib code produces two warnings:
> 
> net/ipv4/netfilter/nft_fib_ipv4.c: In function 'nft_fib4_eval':
> net/ipv4/netfilter/nft_fib_ipv4.c:80:6: error: unused variable 'i' [-Werror=unused-variable]
> net/ipv4/netfilter/nft_fib_ipv4.c: In function ‘nft_fib4_eval’:
> net/ipv4/netfilter/nft_fib_ipv4.c:137:6: error: ‘oif’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> The first one is obvious as the only user of that variable is
> inside of an #ifdef, but the second one is a bit trickier.
> It is clear that 'oif' is uninitialized here if neither
> NFTA_FIB_F_OIF nor NFTA_FIB_F_IIF are set.
> 
> I have no idea how that should be handled, this patch just
> returns without doing anything, which may or may not be
> the right thing to do.

It should be initialized to NULL.
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