Pointed out by Keith Stribley on HarfBuzz list.

Reported by Keith Stribley on HarfBuzz list.

Part of Bug 595539 - Regressions in rendering certain Thai sequences with
OpenType font

Part of Bug 595539 - Regressions in rendering certain Thai sequences with
OpenType font

Fix off-by-one.

Hiss!

Unlike the rest of the memory-mode enum, this one didn't only
describe the access mode of the input memory region.  Remove it.

If someone wants to inhibit duplicating, they can lock the blob
and throw away the key.

Based on mailing list discussion with Carl Worth.

Autoconfiscate a simple call to mprotect() even more.

Bug 592036 - integer overflow bug causes misrendering of Nepali characters