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authorDan Carpenter <error27@gmail.com>2011-01-10 04:06:58 +0000
committerDavid S. Miller <davem@davemloft.net>2011-01-10 13:33:17 -0800
commitfacb4edc1e0e849ea98e147a821e60d6d6272c0a (patch)
tree4de1206d197e889690b622593ab785b318d1905f /net/phonet
parentc599bd6b9ac8926b03e6bf332a8c14ae2ffb43a3 (diff)
downloadlinux-facb4edc1e0e849ea98e147a821e60d6d6272c0a.tar.gz
phonet: some signedness bugs
Dan Rosenberg pointed out that there were some signed comparison bugs in the phonet protocol. http://marc.info/?l=full-disclosure&m=129424528425330&w=2 The problem is that we check for array overflows but "protocol" is signed and we don't check for array underflows. If you have already have CAP_SYS_ADMIN then you could use the bugs to get root, or someone could cause an oops by mistake. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: RĂ©mi Denis-Courmont <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/phonet')
-rw-r--r--net/phonet/af_phonet.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index fd95beb72f5..1072b2c19d3 100644
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -37,7 +37,7 @@
/* Transport protocol registration */
static struct phonet_protocol *proto_tab[PHONET_NPROTO] __read_mostly;
-static struct phonet_protocol *phonet_proto_get(int protocol)
+static struct phonet_protocol *phonet_proto_get(unsigned int protocol)
{
struct phonet_protocol *pp;
@@ -458,7 +458,7 @@ static struct packet_type phonet_packet_type __read_mostly = {
static DEFINE_MUTEX(proto_tab_lock);
-int __init_or_module phonet_proto_register(int protocol,
+int __init_or_module phonet_proto_register(unsigned int protocol,
struct phonet_protocol *pp)
{
int err = 0;
@@ -481,7 +481,7 @@ int __init_or_module phonet_proto_register(int protocol,
}
EXPORT_SYMBOL(phonet_proto_register);
-void phonet_proto_unregister(int protocol, struct phonet_protocol *pp)
+void phonet_proto_unregister(unsigned int protocol, struct phonet_protocol *pp)
{
mutex_lock(&proto_tab_lock);
BUG_ON(proto_tab[protocol] != pp);