From d370af0ef7951188daeb15bae75db7ba57c67846 Mon Sep 17 00:00:00 2001 From: Dan Rosenberg Date: Sun, 20 Mar 2011 15:32:06 +0000 Subject: [PATCH] irda: validate peer name and attribute lengths Length fields provided by a peer for names and attributes may be longer than the destination array sizes. Validate lengths to prevent stack buffer overflows. Signed-off-by: Dan Rosenberg Cc: stable@kernel.org Signed-off-by: David S. Miller --- net/irda/iriap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/irda/iriap.c b/net/irda/iriap.c index 5b743bdd89ba..36477538cea8 100644 --- a/net/irda/iriap.c +++ b/net/irda/iriap.c @@ -656,10 +656,16 @@ static void iriap_getvaluebyclass_indication(struct iriap_cb *self, n = 1; name_len = fp[n++]; + + IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;); + memcpy(name, fp+n, name_len); n+=name_len; name[name_len] = '\0'; attr_len = fp[n++]; + + IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;); + memcpy(attr, fp+n, attr_len); n+=attr_len; attr[attr_len] = '\0'; -- 2.20.1