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| author | Dan Carpenter <error27@gmail.com> | 2011-01-10 04:06:58 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-10 13:33:17 -0800 |
| commit | facb4edc1e0e849ea98e147a821e60d6d6272c0a (patch) | |
| tree | 4de1206d197e889690b622593ab785b318d1905f /net/phonet | |
| parent | c599bd6b9ac8926b03e6bf332a8c14ae2ffb43a3 (diff) | |
| download | lwn-facb4edc1e0e849ea98e147a821e60d6d6272c0a.tar.gz lwn-facb4edc1e0e849ea98e147a821e60d6d6272c0a.zip | |
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: Rémi 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.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c index fd95beb72f5d..1072b2c19d31 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); |