buildroot/package/libsndfile/0007-mat4-mat5-fix-int-overflow-when-calculating-blockwid.patch

From 39f2a4ffe5ab77d1cadc2057c2db046a9a3d5d65 Mon Sep 17 00:00:00 2001
From: Alex Stewart <alex.stewart@ni.com>
Date: Wed, 11 Oct 2023 16:12:22 -0400
Subject: [PATCH] mat4/mat5: fix int overflow when calculating blockwidth

Pre-cast the components of the blockwidth calculation to sf_count_t to
avoid overflowing integers during calculation.

CVE: CVE-2022-33065
Fixes: https://github.com/libsndfile/libsndfile/issues/833

Signed-off-by: Alex Stewart <alex.stewart@ni.com>
Upstream: https://github.com/libsndfile/libsndfile/commit/39f2a4ffe5ab77d1cadc2057c2db046a9a3d5d65
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 src/mat4.c | 2 +-
 src/mat5.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mat4.c b/src/mat4.c
index 575683ba..9f046f0c 100644
--- a/src/mat4.c
+++ b/src/mat4.c
@@ -104,7 +104,7 @@ mat4_open	(SF_PRIVATE *psf)
 
 	psf->container_close = mat4_close ;
 
-	psf->blockwidth = psf->bytewidth * psf->sf.channels ;
+	psf->blockwidth = (sf_count_t) psf->bytewidth * psf->sf.channels ;
 
 	switch (subformat)
 	{	case SF_FORMAT_PCM_16 :
diff --git a/src/mat5.c b/src/mat5.c
index da5a6eca..20f0ea64 100644
--- a/src/mat5.c
+++ b/src/mat5.c
@@ -114,7 +114,7 @@ mat5_open	(SF_PRIVATE *psf)
 
 	psf->container_close = mat5_close ;
 
-	psf->blockwidth = psf->bytewidth * psf->sf.channels ;
+	psf->blockwidth = (sf_count_t) psf->bytewidth * psf->sf.channels ;
 
 	switch (subformat)
 	{	case SF_FORMAT_PCM_U8 :
-- 
2.39.5