From efc463eb508798da4243625b08c7396462cabf9f Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Mon, 11 Oct 2010 01:17:56 +0200 Subject: [PATCH] irda: Fix parameter extraction stack overflow Cc: stable@kernel.org Reported-by: Ilja Van Sprundel Signed-off-by: Samuel Ortiz --- net/irda/parameters.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/irda/parameters.c b/net/irda/parameters.c index fc1a20565e2d..71cd38c1a67f 100644 --- a/net/irda/parameters.c +++ b/net/irda/parameters.c @@ -298,6 +298,8 @@ static int irda_extract_string(void *self, __u8 *buf, int len, __u8 pi, p.pi = pi; /* In case handler needs to know */ p.pl = buf[1]; /* Extract length of value */ + if (p.pl > 32) + p.pl = 32; IRDA_DEBUG(2, "%s(), pi=%#x, pl=%d\n", __func__, p.pi, p.pl); @@ -318,7 +320,7 @@ static int irda_extract_string(void *self, __u8 *buf, int len, __u8 pi, (__u8) str[0], (__u8) str[1]); /* Null terminate string */ - str[p.pl+1] = '\0'; + str[p.pl] = '\0'; p.pv.c = str; /* Handler will need to take a copy */ -- 2.20.1