From a979101106f549f4ed80d6dcbc35077be34d4346 Mon Sep 17 00:00:00 2001 From: Thomas Graf 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 Signed-off-by: David S. Miller --- 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 3cbfddc984..82d58a977e 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; -- 2.39.5