openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

netfilter: ipset: Fix static checker warning in ip_set_core.c 

Dan Carpenter reported the following static checker warning:

        net/netfilter/ipset/ip_set_core.c:1414 call_ad()
        error: 'nlh->nlmsg_len' from user is not capped properly

The payload size is limited now by the max size of size_t.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
This commit is contained in:
Jozsef Kadlecsik 2014-09-15 20:48:26 +02:00
parent 0bbe80e571
commit 73e64e1813
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
net/netfilter/ipset/ip_set_core.c
View File

@ -1397,7 +1397,8 @@ call_ad(struct sock *ctnl, struct sk_buff *skb, struct ip_set *set,
struct nlmsghdr *rep, *nlh = nlmsg_hdr(skb);
struct sk_buff *skb2;
struct nlmsgerr *errmsg;
size_t payload = sizeof(*errmsg) + nlmsg_len(nlh);
size_t payload = min(SIZE_MAX,
sizeof(*errmsg) + nlmsg_len(nlh));
int min_len = nlmsg_total_size(sizeof(struct nfgenmsg));
struct nlattr *cda[IPSET_ATTR_CMD_MAX+1];
struct nlattr *cmdattr;