[FFmpeg-cvslog] avcodec/aacsbr_template: Clear n_q on error

[Michael Niedermayer]

ffmpeg | branch: release/4.3 | Michael Niedermayer <michael at niedermayer.cc> | Sun Dec  1 22:27:18 2024 +0100| [34eb233f072a91597445928da04478552eb6490a] | committer: Michael Niedermayer

avcodec/aacsbr_template: Clear n_q on error

Fixes: index 5 out of bounds for type 'uint8_t [5]'
Fixes: 377748135/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_LATM_fuzzer-5167109774049280

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 3f029bfb7f9ca1c73fecb8d0eacf3c4e0550f771)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=34eb233f072a91597445928da04478552eb6490a
---

 libavcodec/aacsbr_template.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/aacsbr_template.c b/libavcodec/aacsbr_template.c
index 821615f2ab..d9ee4efe6e 100644
--- a/libavcodec/aacsbr_template.c
+++ b/libavcodec/aacsbr_template.c
@@ -592,6 +592,7 @@ static int sbr_make_f_derived(AACContext *ac, SpectralBandReplication *sbr)
 
     if (sbr->n_q > 5) {
         av_log(ac->avctx, AV_LOG_ERROR, "Too many noise floor scale factors: %d\n", sbr->n_q);
+        sbr->n_q = 1;
         return -1;
     }