On 8/14/2024 11:34 AM, Michael Niedermayer wrote:
Fixes: use of uninitialized value
Fixes:
70929/clusterfuzz-testcase-minimized-ffmpeg_dem_IAMF_fuzzer-5931276639469568
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavformat/iamf_parse.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c
index 296e49157b0..f2b6d4fa518 100644
--- a/libavformat/iamf_parse.c
+++ b/libavformat/iamf_parse.c
@@ -1076,6 +1076,7 @@ int ff_iamfdec_read_descriptors(IAMFContext *c,
AVIOContext *pb,
size = avio_read(pb, header, FFMIN(MAX_IAMF_OBU_HEADER_SIZE,
max_size));
if (size < 0)
return size;
+ memset(header + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
len = ff_iamf_parse_obu_header(header, size, &obu_size, &start_pos, &type, NULL, NULL);
if (len < 0 || obu_size > max_size) {
I assume get_bits() reads into the padding?
Should be ok.
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