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From ced91d7b971be6173b604154c39279ce90ad87cc Mon Sep 17 00:00:00 2001
From: yuan <ssspeed00@gmail.com>
Date: Tue, 20 Apr 2021 16:16:32 +0800
Subject: [PATCH] flac: Fix improper buffer reusing (#732)
Upstream-Status: Backport [https://github.com/libsndfile/libsndfile/commit/ced91d7b971be6173b604154c39279ce90ad87cc]
CVE: CVE-2021-4156
Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com>
---
src/flac.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/flac.c b/src/flac.c
index 0be82ac..4fa5cfa 100644
--- a/src/flac.c
+++ b/src/flac.c
@@ -952,7 +952,11 @@ flac_read_loop (SF_PRIVATE *psf, unsigned len)
/* Decode some more. */
while (pflac->pos < pflac->len)
{ if (FLAC__stream_decoder_process_single (pflac->fsd) == 0)
+ { psf_log_printf (psf, "FLAC__stream_decoder_process_single returned false\n") ;
+ /* Current frame is busted, so NULL the pointer. */
+ pflac->frame = NULL ;
break ;
+ } ;
state = FLAC__stream_decoder_get_state (pflac->fsd) ;
if (state >= FLAC__STREAM_DECODER_END_OF_STREAM)
{ psf_log_printf (psf, "FLAC__stream_decoder_get_state returned %s\n", FLAC__StreamDecoderStateString [state]) ;
--
2.40.1
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