On 7/31/2024 4:54 PM, Michael Niedermayer wrote:
Fixes:
70458/clusterfuzz-testcase-minimized-ffmpeg_BSF_TRACE_HEADERS_fuzzer-5259339779080192
Fixes: Assertion width > 0 && width <= 32 failed at libavcodec/cbs.c:608
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavcodec/cbs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
index b26e39eab4d..dcbc86a5f7d 100644
--- a/libavcodec/cbs.c
+++ b/libavcodec/cbs.c
@@ -605,7 +605,7 @@ static av_always_inline int
cbs_read_unsigned(CodedBitstreamContext *ctx,
CBS_TRACE_READ_START();
- av_assert0(width > 0 && width <= 32);
+ av_assert0(width >= 0 && width <= 32);
No, sei_3d_reference_displays_info should instead not attempt to read
from the bitstream when width is 0.
I'll send a patch for this later.
if (get_bits_left(gbc) < width) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid value at "
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