The branch, master has been updated
via 134fbfd1dcb59441e38d870ddd231772f4e8e127 (commit)
from a2cfaf1b916cd4519249031adc37e339baca7a7b (commit)
- Log -----------------------------------------------------------------
commit 134fbfd1dcb59441e38d870ddd231772f4e8e127
Author: Michael Niedermayer <[email protected]>
AuthorDate: Sun Aug 17 15:31:48 2025 +0200
Commit: Michael Niedermayer <[email protected]>
CommitDate: Sun Aug 17 15:39:33 2025 +0200
avcodec/sanm: Check w,h,left,top
The setup code fow w,h,left,top is complex, the code using it also falls in
at least 2 different classes, one using left/top the other not.
To ensure no out of array access happens we add this clear check.
Fixes: out of array access
Fixes:
439261995/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SANM_fuzzer-5383455572819968
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <[email protected]>
diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c
index a066a864eb..9e99aa9dd9 100644
--- a/libavcodec/sanm.c
+++ b/libavcodec/sanm.c
@@ -1757,6 +1757,11 @@ static int process_frame_obj(SANMVideoContext *ctx,
GetByteContext *gb)
memset(ctx->fbuf, 0, ctx->frm0_size);
}
+ if (w + FFMAX(left, 0) > ctx->avctx->width || h + FFMAX(top, 0) >
ctx->avctx->height) {
+ avpriv_request_sample(ctx->avctx, "overly large frame\n");
+ return AVERROR_PATCHWELCOME;
+ }
+
switch (codec) {
case 1:
case 3:
-----------------------------------------------------------------------
Summary of changes:
libavcodec/sanm.c | 5 +++++
1 file changed, 5 insertions(+)
hooks/post-receive
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