tree bba780bd25c4dfe28162f6dd2a39a5d141278db0
parent 207c01bfe053b5853bd60cba4736ded64e8fa172
author Keith Mok <keithmok@google.com> 1693441895 +0000
committer Android Build Coastguard Worker <android-build-coastguard-worker@google.com> 1701902662 +0000

Add seal if ashmem-dev is backed by memfd

Need to seal the buffer size in align with ashmem if set to PROT_READ
only to prevent untrusted remote process to shrink the buffer size and
crash it.

Bug: 294609150
Test: build
Ignore-AOSP-First: Security
(cherry picked from commit f83c5c8fecf89d9315945368aa20350c2f235cc0)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:61a2897733e15a12b7aa2dfd99957e83cbe59351)
Merged-In: I9288cf30b41e84ad8d3247c204e20482912bff69
Change-Id: I9288cf30b41e84ad8d3247c204e20482912bff69