commit a376c43f5180c41f7c3760e5b59406737923f307
author Markus Metzger <markus.t.metzger@intel.com> Wed Dec 23 10:31:55 2015 +0100
committer Markus Metzger <markus.t.metzger@intel.com> Mon Jan 18 16:42:24 2016 +0100
tree d72e751d8f551d97623eab0e9bcb0e873482f3f6
parent d6196012ef3b6086b0d7f512cd378c7ab84e0816

libipt: check section boundaries in pt_section_read()

When reading from a mapped section, we perform all kinds of overflow checks in
the various read functions.  And we still missed an overflow on systems with
32-bit pointers.

Move the check to pt_section_read() where we check the requested offset against
the section size.  Also truncate the read request there, if necessary.

This fixes the overflow on systems with 32-bit pointers.

Change-Id: I3c4591dcde113e2696347298af5ad3671ef0e41c
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>