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avcodec/dirac_parser: Add basic validity checks for next_pu_offset and prev_pu_offset 

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit c7d6ec947c)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-12-05 17:14:36 +01:00
parent d092b7f04c
commit ece3912daf
1 changed files with 9 additions and 0 deletions
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9
libavcodec/dirac_parser.c
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@ -114,6 +114,15 @@ static int unpack_parse_unit(DiracParseUnit *pu, DiracParseContext *pc,
if (pu->pu_type == 0x10 && pu->next_pu_offset == 0)
pu->next_pu_offset = 13;
if (pu->next_pu_offset && pu->next_pu_offset < 13) {
av_log(NULL, AV_LOG_ERROR, "next_pu_offset %d is invalid\n", pu->next_pu_offset);
return 0;
}
if (pu->prev_pu_offset && pu->prev_pu_offset < 13) {
av_log(NULL, AV_LOG_ERROR, "prev_pu_offset %d is invalid\n", pu->prev_pu_offset);
return 0;
}
return 1;
}