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avcodec/h264_mp4toannexb_bsf: Reorder operations in nal_size check
Fixes Ticket4778
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Michael Niedermayer authored on 2015/08/21 09:49:21Showing 1 changed files
| ... | ... |
@@ -201,7 +201,7 @@ static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc, |
| 201 | 201 |
buf += ctx->length_size; |
| 202 | 202 |
unit_type = *buf & 0x1f; |
| 203 | 203 |
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| 204 |
- if (buf + nal_size > buf_end || nal_size < 0) |
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| 204 |
+ if (nal_size > buf_end - buf || nal_size < 0) |
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| 205 | 205 |
goto fail; |
| 206 | 206 |
|
| 207 | 207 |
if (unit_type == 7) |