3.16.40-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: "John W. Linville" <linville@xxxxxxxxxxxxx> commit f1d505bb762e30bf316ff5d3b604914649d6aed3 upstream. Commit 36b701fae12ac ("netfilter: nf_tables: validate maximum value of u32 netlink attributes") introduced nft_parse_u32_check with a return value of "unsigned int", yet on error it returns "-ERANGE". This patch corrects the mismatch by changing the return value to "int", which happens to match the actual users of nft_parse_u32_check already. Found by Coverity, CID 1373930. Note that commit 21a9e0f1568ea ("netfilter: nft_exthdr: fix error handling in nft_exthdr_init()) attempted to address the issue, but did not address the return type of nft_parse_u32_check. Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx> Cc: Laura Garcia Liebana <nevola@xxxxxxxxx> Cc: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Fixes: 36b701fae12ac ("netfilter: nf_tables: validate maximum value...") Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- include/net/netfilter/nf_tables.h | 2 +- net/netfilter/nf_tables_api.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/include/net/netfilter/nf_tables.h +++ b/include/net/netfilter/nf_tables.h @@ -113,7 +113,7 @@ static inline enum nft_registers nft_typ return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1; } -unsigned int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); +int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); int nft_validate_input_register(enum nft_registers reg); int nft_validate_output_register(enum nft_registers reg); int nft_validate_data_load(const struct nft_ctx *ctx, enum nft_registers reg, --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -3723,7 +3723,7 @@ static int nf_tables_check_loops(const s * Otherwise a 0 is returned and the attribute value is stored in the * destination variable. */ -unsigned int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest) +int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest) { u32 val;