From cf3156e762bbd3fbaf9da53f3ef1ea6d1bad2ec5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 18 May 2019 10:37:26 +0200 Subject: [PATCH] avcodec/aacdec_template: skip apply_tns() if max_sfb is 0 (from previous header decode failure) Fixes: NULL pointer dereference Fixes: 14723/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_LATM_fuzzer-5654612436058112 Fixes: 14724/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_LATM_fuzzer-5712607111020544 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/aacdec_template.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/aacdec_template.c b/libavcodec/aacdec_template.c index 7021153103..28765c768d 100644 --- a/libavcodec/aacdec_template.c +++ b/libavcodec/aacdec_template.c @@ -2492,6 +2492,9 @@ static void apply_tns(INTFLOAT coef_param[1024], TemporalNoiseShaping *tns, INTFLOAT tmp[TNS_MAX_ORDER+1]; UINTFLOAT *coef = coef_param; + if(!mmm) + return; + for (w = 0; w < ics->num_windows; w++) { bottom = ics->num_swb; for (filt = 0; filt < tns->n_filt[w]; filt++) {