tree 0cdbf0e59f5500625b21a9f4f000bc210986168a
parent 0b0d4a34083e2a1fef2a509a9df62436dc4ecc60
author Wan-Teh Chang <wtc@google.com> 1665792779 -0700
committer Wan-Teh Chang <wtc@google.com> 1666026623 -0700

avifincrtest_helpers: Cast 64-bit offset to size_t

Cast the 64-bit offset parameter of PartialRead() to a size_t local
variable after verifying that the offset is less than or equal to
data->full_size (a size_t). From that point on, use the size_t local
variable as the offset exclusively. Note that size_t is a 32-bit
unsigned integer on 32-bit platforms.

Audit the entire PartialRead() function for integer overflows.

Fix https://github.com/AOMediaCodec/libavif/issues/1165.