#764: Increasing robustness of runlength decoding for scantable access in
mpeg12.c
-------------------------------------+-------------------------------------
Reporter: erik | Owner:
Type: defect | Status: new
Priority: normal | Component: avcodec
Version: unspecified | Resolution:
Keywords: mpeg | Blocked By:
robustness | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
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Comment (by erik):
One more question.
Can valgrind find errors in pointer calculation?
Part of the scantable access is done by type array indexing but the last
use case is done by pointer arithmic
Code fragment from mpeg12.c:
uint8_t * scantable = s->intra_scantable.permutated;
....
if (level == 127) {
break;
} else if (level != 0) {
scantable += run;
j = *scantable;
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/764#comment:9>
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