libext2fs: Round up the bitmap size when allocating a new bitmap
The x86 BT assembly instructure can overshoot the end of a bit array
when testing a bit at the end of the bit array, even if it never needs
to look at those memory locations. This can cause a spurious
segmentation fault. If we allocate a little extra memory, it avoids
this problem. See:
http://faydoc.tripod.com/cpu/bt.htm
This doesn't happen on Linux, probably because of the glibc's malloc()
function works, but apparently it's a major problem on the *BSD
operating systems.
Addresses-Sourceforge-Bug: #2328708
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
1 file changed