diff mbox series

[net-next,4/5] netfilter: conntrack: validate cta_ip via parsing

Message ID 20230727133604.8275-5-fw@strlen.de (mailing list archive)
State Accepted
Commit 0c805e80e35d042a41c8702fa13f453a504d2ede
Delegated to: Netdev Maintainers
Headers show
Series [net-next,1/5] nf_conntrack: fix -Wunused-const-variable= | expand

Checks

Context Check Description
netdev/series_format success Pull request is its own cover letter
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1343 this patch: 1343
netdev/cc_maintainers warning 3 maintainers not CCed: pablo@netfilter.org coreteam@netfilter.org kadlec@netfilter.org
netdev/build_clang success Errors and warnings before: 1365 this patch: 1365
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1366 this patch: 1366
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 17 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Florian Westphal July 27, 2023, 1:35 p.m. UTC 
From: Lin Ma <linma@zju.edu.cn>

In current ctnetlink_parse_tuple_ip() function, nested parsing and
validation is splitting as two parts,  which could be cleanup to a
simplified form. As the nla_parse_nested_deprecated function
supports validation in the fly. These two finially reach same place
__nla_validate_parse with same validate flag.

nla_parse_nested_deprecated
  __nla_parse(.., NL_VALIDATE_LIBERAL, ..)
    __nla_validate_parse

nla_validate_nested_deprecated
  __nla_validate_nested(.., NL_VALIDATE_LIBERAL, ..)
    __nla_validate
      __nla_validate_parse

This commit removes the call to nla_validate_nested_deprecated and pass
cta_ip_nla_policy when do parsing.

Signed-off-by: Lin Ma <linma@zju.edu.cn>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
---
 net/netfilter/nf_conntrack_netlink.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 69c8c8c7e9b8..334db22199c1 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -1321,15 +1321,11 @@  static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
 	struct nlattr *tb[CTA_IP_MAX+1];
 	int ret = 0;
 
-	ret = nla_parse_nested_deprecated(tb, CTA_IP_MAX, attr, NULL, NULL);
+	ret = nla_parse_nested_deprecated(tb, CTA_IP_MAX, attr,
+					  cta_ip_nla_policy, NULL);
 	if (ret < 0)
 		return ret;
 
-	ret = nla_validate_nested_deprecated(attr, CTA_IP_MAX,
-					     cta_ip_nla_policy, NULL);
-	if (ret)
-		return ret;
-
 	switch (tuple->src.l3num) {
 	case NFPROTO_IPV4:
 		ret = ipv4_nlattr_to_tuple(tb, tuple, flags);