diff options
| author | Florian Westphal <fw@strlen.de> | 2012-05-10 22:11:54 +0000 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-05-17 00:56:31 +0200 |
| commit | 1f27e2516c1d95ae19024bec5be68a3f489cc47e (patch) | |
| tree | 9eeb1a8d5b8248ec36602198aeafaf9e07e7fcc5 | |
| parent | 6d8823db422ae6719c7840fe11f737a40ffe4993 (diff) | |
netfilter: xt_hashlimit: use _ALL macro to reject unknown flag bits
David Miller says:
The canonical way to validate if the set bits are in a valid
range is to have a "_ALL" macro, and test:
if (val & ~XT_HASHLIMIT_ALL)
goto err;"
make it so.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | include/linux/netfilter/xt_hashlimit.h | 6 | ||||
| -rw-r--r-- | net/netfilter/xt_hashlimit.c | 2 |
2 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/netfilter/xt_hashlimit.h b/include/linux/netfilter/xt_hashlimit.h index 05fe7993dd76..c42e52f39f8f 100644 --- a/include/linux/netfilter/xt_hashlimit.h +++ b/include/linux/netfilter/xt_hashlimit.h @@ -22,10 +22,12 @@ enum { XT_HASHLIMIT_HASH_SPT = 1 << 3, XT_HASHLIMIT_INVERT = 1 << 4, XT_HASHLIMIT_BYTES = 1 << 5, +}; #ifdef __KERNEL__ - XT_HASHLIMIT_MAX = 1 << 6, +#define XT_HASHLIMIT_ALL (XT_HASHLIMIT_HASH_DIP | XT_HASHLIMIT_HASH_DPT | \ + XT_HASHLIMIT_HASH_SIP | XT_HASHLIMIT_HASH_SPT | \ + XT_HASHLIMIT_INVERT | XT_HASHLIMIT_BYTES) #endif -}; struct hashlimit_cfg { __u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */ diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c index 5d5af1d04fa2..26a668a84aa2 100644 --- a/net/netfilter/xt_hashlimit.c +++ b/net/netfilter/xt_hashlimit.c @@ -647,7 +647,7 @@ static int hashlimit_mt_check(const struct xt_mtchk_param *par) return -EINVAL; } - if (info->cfg.mode >= XT_HASHLIMIT_MAX) { + if (info->cfg.mode & ~XT_HASHLIMIT_ALL) { pr_info("Unknown mode mask %X, kernel too old?\n", info->cfg.mode); return -EINVAL; |