File sdp-Fix-buffer-overflow.patch of Package bluez.25900

From 6c7243fb6ab90b7b855cead98c66394fedea135f Mon Sep 17 00:00:00 2001
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Date: Fri, 28 Sep 2018 16:08:32 +0300
Subject: [PATCH] sdp: Fix buffer overflow
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sdp_append_buf shall check if there is enough space to store the data
before copying it.

An independent security researcher, Julian Rauchberger, has reported
this vulnerability to Beyond Security’s SecuriTeam Secure Disclosure
program.
---
 lib/sdp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/sdp.c b/lib/sdp.c
index eb408a948..84311eda1 100644
--- a/lib/sdp.c
+++ b/lib/sdp.c
@@ -2834,6 +2834,12 @@ void sdp_append_to_buf(sdp_buf_t *dst, uint8_t *data, uint32_t len)
 	SDPDBG("Append src size: %d", len);
 	SDPDBG("Append dst size: %d", dst->data_size);
 	SDPDBG("Dst buffer size: %d", dst->buf_size);
+
+	if (dst->data_size + len > dst->buf_size) {
+		SDPERR("Cannot append");
+		return;
+	}
+
 	if (dst->data_size == 0 && dtd == 0) {
 		/* create initial sequence */
 		*p = SDP_SEQ8;
-- 
2.35.3