From 5adbc377cd90aa40f0cd56ae325ca70065a8aa19 Mon Sep 17 00:00:00 2001
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From: Changqing Li <changqing.li@windriver.com>
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Date: Thu, 13 Jan 2022 16:45:59 +0800
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Subject: [PATCH] flac: Fix improper buffer reusing
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CVE: CVE-2021-4156.patch
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Upstream-Status: Backport [https://github.com/libsndfile/libsndfile/issues/731]
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Signed-off-by: Changqing Li <changqing.li@windriver.com>
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---
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src/flac.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/src/flac.c b/src/flac.c
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index 0be82ac..6548bba 100644
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--- a/src/flac.c
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+++ b/src/flac.c
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@@ -952,7 +952,11 @@ flac_read_loop (SF_PRIVATE *psf, unsigned len)
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/* Decode some more. */
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while (pflac->pos < pflac->len)
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{ if (FLAC__stream_decoder_process_single (pflac->fsd) == 0)
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+ { psf_log_printf (psf, "FLAC__stream_decoder_process_single returned false\n") ;
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+ /* Current frame is busted, so NULL the pointer. */
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+ pflac->frame = NULL ;
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break ;
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+ }
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state = FLAC__stream_decoder_get_state (pflac->fsd) ;
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if (state >= FLAC__STREAM_DECODER_END_OF_STREAM)
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{ psf_log_printf (psf, "FLAC__stream_decoder_get_state returned %s\n", FLAC__StreamDecoderStateString [state]) ;
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--
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2.17.1
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