diff options
Diffstat (limited to 'net/ipv4/fib_trie.c')
| -rw-r--r-- | net/ipv4/fib_trie.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 6e9df7d9bcc2..9bd46e1e1037 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1099,6 +1099,17 @@ static int fib_insert_alias(struct trie *t, struct key_vector *tp, return 0; } +static bool fib_valid_key_len(u32 key, u8 plen) +{ + if (plen > KEYLENGTH) + return false; + + if ((plen < KEYLENGTH) && (key << plen)) + return false; + + return true; +} + /* Caller must hold RTNL. */ int fib_table_insert(struct net *net, struct fib_table *tb, struct fib_config *cfg, struct netlink_ext_ack *extack) @@ -1115,16 +1126,13 @@ int fib_table_insert(struct net *net, struct fib_table *tb, u32 key; int err; - if (plen > KEYLENGTH) - return -EINVAL; - key = ntohl(cfg->fc_dst); - pr_debug("Insert table=%u %08x/%d\n", tb->tb_id, key, plen); - - if ((plen < KEYLENGTH) && (key << plen)) + if (!fib_valid_key_len(key, plen)) return -EINVAL; + pr_debug("Insert table=%u %08x/%d\n", tb->tb_id, key, plen); + fi = fib_create_info(cfg, extack); if (IS_ERR(fi)) { err = PTR_ERR(fi); @@ -1518,12 +1526,9 @@ int fib_table_delete(struct net *net, struct fib_table *tb, u8 tos = cfg->fc_tos; u32 key; - if (plen > KEYLENGTH) - return -EINVAL; - key = ntohl(cfg->fc_dst); - if ((plen < KEYLENGTH) && (key << plen)) + if (!fib_valid_key_len(key, plen)) return -EINVAL; l = fib_find_node(t, &tp, key); |