[PATCH 1/3] netfilter: nf_tables: avoid uninitialized variable warning
From: Arnd Bergmann <arnd@arndb.de>
Date: 2016-09-30 16:06:34
Also in:
lkml, netfilter-devel
Subsystem:
netfilter, networking [general], the rest · Maintainers:
Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 can be trivially avoided by added a 'default:' clause.
Fixes: 0f3cd9b36977 ("netfilter: nf_tables: add range expression")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
net/netfilter/nft_range.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/netfilter/nft_range.c b/net/netfilter/nft_range.c
index c6d5358482d1..72dff5bffca8 100644
--- a/net/netfilter/nft_range.c
+++ b/net/netfilter/nft_range.c@@ -40,6 +40,8 @@ static void nft_range_eval(const struct nft_expr *expr, case NFT_RANGE_NEQ: mismatch = (d1 >= 0 && d2 <= 0); break; + default: + mismatch = 0; } if (mismatch)
--
2.9.0