tree 10aa1505aa3bf4c35cf8cc5ca69ab926c8276aa9
parent 8f1b3744e52b2adb6475c3cd7a07ff9331e9c2fa
author Mark Adler <madler@alumni.caltech.edu> 1448607145 -0800
committer Mark Adler <madler@alumni.caltech.edu> 1448607145 -0800

Fix bug that accepted invalid zlib header when windowBits is zero.

When windowBits is zero, the size of the sliding window comes from
the zlib header.  The allowed values of the four-bit field are
0..7, but when windowBits is zero, values greater than 7 are
permitted and acted upon, resulting in large, mostly unused memory
allocations.  This fix rejects such invalid zlib headers.