From aa4c72377c4f6f53507dd0f1d98882be10f71851 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 13 Jul 2015 13:46:10 +0200 Subject: [PATCH] avcodec/alac: Clear pointers in allocate_buffers() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit avcodec/alac: Clear pointers in allocate_buffers() Fixes: 06a4edb39ad8a9883175f9bd428334a2_signal_sigsegv_7ffff713351a_706_mov__alac__ALAC_6ch.mov Found-by: Samuel Groß, Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer Gbp-Pq: Name CVE-2015-6823.patch --- libavcodec/alac.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libavcodec/alac.c b/libavcodec/alac.c index 0d25adc..eaf7bf6 100644 --- a/libavcodec/alac.c +++ b/libavcodec/alac.c @@ -482,6 +482,12 @@ static int allocate_buffers(ALACContext *alac) int ch; int buf_size = alac->max_samples_per_frame * sizeof(int32_t); + for (ch = 0; ch < 2; ch++) { + alac->predict_error_buffer[ch] = NULL; + alac->output_samples_buffer[ch] = NULL; + alac->extra_bits_buffer[ch] = NULL; + } + for (ch = 0; ch < FFMIN(alac->channels, 2); ch++) { FF_ALLOC_OR_GOTO(alac->avctx, alac->predict_error_buffer[ch], buf_size, buf_alloc_fail); -- 2.30.2