From a0ee18b9b7d3847976c6fb315c06a34fb296de0e Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Sat, 24 Mar 2007 20:32:54 -0700 Subject: [PATCH] [IPv4] fib: Fix out of bound access of fib_props[] Fixes a typo which caused fib_props[] to have the wrong size and makes sure the value used to index the array which is provided by userspace via netlink is checked to avoid out of bound access. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/ipv4/fib_frontend.c | 5 +++++ net/ipv4/fib_semantics.c | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 1fba6439fc..fc920f6345 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -493,6 +493,11 @@ static int rtm_to_fib_config(struct sk_buff *skb, struct nlmsghdr *nlh, cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; cfg->fc_nlinfo.nlh = nlh; + if (cfg->fc_type > RTN_MAX) { + err = -EINVAL; + goto errout; + } + nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) { switch (attr->nla_type) { case RTA_DST: diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index 2f1fdae6ef..3dad12ee76 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -89,7 +89,7 @@ static const struct { int error; u8 scope; -} fib_props[RTA_MAX + 1] = { +} fib_props[RTN_MAX + 1] = { { .error = 0, .scope = RT_SCOPE_NOWHERE, -- 2.39.5