FFmpeg

99384 Commits

37 Branches

400 Tags

488 MiB

Tag: Branch: Tree: bb16dbc002

Commit Graph

Author	SHA1	Message	Date
Andreas Rheinhardt	5b33f523d7	avformat/aaxdec: Fix potential integer overflow The AAX demuxer reads a 32bit number containing the amount of entries of an array and stores it in an uint32_t. Yet when iterating over this array, a loop counter of type int is used. This leads to undefined behaviour if the amount of entries is not in the range of int; to avoid this, it is generally good to use the same type for the loop counter as for the variable it is compared to. This is done in one of the two loops affected by this. In the other loop, the undefined behaviour can begin even earlier: Here the loop counter is multiplied by an uint16_t which can overflow as soon as the loop counter is > 2^15. Using an unsigned type would avoid the undefined behaviour, but truncation would still be possible, so use an uint64_t. Also use an uint32_t for a variable containing an index in said array. This fixes Coverity issue #1466767. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	4 years ago
Paul B Mahol	92396cee60	avformat: add CRI AAX demuxer	4 years ago

Author

SHA1

Message

Date

Andreas Rheinhardt

5b33f523d7

avformat/aaxdec: Fix potential integer overflow

The AAX demuxer reads a 32bit number containing the amount of entries
of an array and stores it in an uint32_t. Yet when iterating over this
array, a loop counter of type int is used. This leads to undefined
behaviour if the amount of entries is not in the range of int; to avoid
this, it is generally good to use the same type for the loop counter as
for the variable it is compared to. This is done in one of the two loops
affected by this.

In the other loop, the undefined behaviour can begin even earlier: Here
the loop counter is multiplied by an uint16_t which can overflow as soon
as the loop counter is > 2^15. Using an unsigned type would avoid the
undefined behaviour, but truncation would still be possible, so use an
uint64_t.

Also use an uint32_t for a variable containing an index in said array.

This fixes Coverity issue #1466767.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

4 years ago

Paul B Mahol

92396cee60

avformat: add CRI AAX demuxer

4 years ago

2 Commits (bb16dbc0026c43d3aba6d803bb0a968ece25ba2b)