[FFmpeg-cvslog] avcodec/aacdec_template: skip apply_tns() if max_sfb is 0 (from previous header decode failure)
Michael Niedermayer
git at videolan.org
Tue Jun 4 14:20:25 EEST 2019
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat May 18 10:37:26 2019 +0200| [cf3156e762bbd3fbaf9da53f3ef1ea6d1bad2ec5] | committer: Michael Niedermayer
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 <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cf3156e762bbd3fbaf9da53f3ef1ea6d1bad2ec5
---
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++) {
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