From a979101106f549f4ed80d6dcbc35077be34d4346 Mon Sep 17 00:00:00 2001
From: Thomas Graf <tgraf@suug.ch>
Date: Sat, 24 Mar 2007 20:33:27 -0700
Subject: [PATCH] [DECNet] fib: Fix out of bound access of dn_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 <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/decnet/dn_fib.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/decnet/dn_fib.c b/net/decnet/dn_fib.c
index 3cbfddc98430..82d58a977e6f 100644
--- a/net/decnet/dn_fib.c
+++ b/net/decnet/dn_fib.c
@@ -63,7 +63,7 @@ static struct
{
int error;
u8 scope;
-} dn_fib_props[RTA_MAX+1] = {
+} dn_fib_props[RTN_MAX+1] = {
[RTN_UNSPEC] = { .error = 0, .scope = RT_SCOPE_NOWHERE },
[RTN_UNICAST] = { .error = 0, .scope = RT_SCOPE_UNIVERSE },
[RTN_LOCAL] = { .error = 0, .scope = RT_SCOPE_HOST },
@@ -276,6 +276,9 @@ struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, struct dn_kern_rta
struct dn_fib_info *ofi;
int nhs = 1;
+ if (r->rtm_type > RTN_MAX)
+ goto err_inval;
+
if (dn_fib_props[r->rtm_type].scope > r->rtm_scope)
goto err_inval;
--
2.20.1