buildroot/package/libsndfile/0011-pcm-fix-int-overflow-in-pcm_init.patch

From 09f8f8d5544d98a5a2d28504c02314a2a816ac37 Mon Sep 17 00:00:00 2001
From: Alex Stewart <alex.stewart@ni.com>
Date: Tue, 17 Oct 2023 11:57:23 -0400
Subject: [PATCH] pcm: fix int overflow in pcm_init()

Cast the int-sized bytewidth variable to a long-sized sf_count_t type
prior to calculating the blockwidth, to provide the calculation with
enough numeric space and sf_count_t is the final typing regardless.

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/09f8f8d5544d98a5a2d28504c02314a2a816ac37
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 src/pcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pcm.c b/src/pcm.c
index bdf46183..a42e4868 100644
--- a/src/pcm.c
+++ b/src/pcm.c
@@ -127,7 +127,7 @@ pcm_init (SF_PRIVATE *psf)
 		return SFE_INTERNAL ;
 		} ;
 
-	psf->blockwidth = psf->bytewidth * psf->sf.channels ;
+	psf->blockwidth = (sf_count_t) psf->bytewidth * psf->sf.channels ;
 
 	if ((SF_CODEC (psf->sf.format)) == SF_FORMAT_PCM_S8)
 		chars = SF_CHARS_SIGNED ;
-- 
2.39.5