[FFmpeg-devel] [PATCH 3/3] avcodec/wavarc: Check k
Michael Niedermayer
michael at niedermayer.cc
Sun Feb 19 01:18:50 EET 2023
Fixes: Assertion failure
Fixes: 55849/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6590105973555200
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/wavarc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/wavarc.c b/libavcodec/wavarc.c
index b626daa66e..8d37af9571 100644
--- a/libavcodec/wavarc.c
+++ b/libavcodec/wavarc.c
@@ -192,6 +192,8 @@ static int decode_1dif(AVCodecContext *avctx,
if (block_type < 4 && block_type >= 0) {
k = 1 + (avctx->sample_fmt == AV_SAMPLE_FMT_S16P);
k = get_urice(gb, k) + 1;
+ if (k > 32)
+ return AVERROR_INVALIDDATA;
}
switch (block_type) {
@@ -282,6 +284,8 @@ static int decode_2slp(AVCodecContext *avctx,
if (block_type < 5 && block_type >= 0) {
k = 1 + (avctx->sample_fmt == AV_SAMPLE_FMT_S16P);
k = get_urice(gb, k) + 1;
+ if (k > 32)
+ return AVERROR_INVALIDDATA;
}
switch (block_type) {
--
2.17.1
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