tree 124283de8346480e75aa3156f890e0330be41423
parent b4ef0beb990d02600cad57096bcd20c9d646c8fa
author Nick Kralevich <nnk@google.com> 1553185771 -0700
committer Nick Kralevich <nnk@google.com> 1553185771 -0700

entry_name_utils-inl.h: clear top bit before shifting

Attempting to shift a uint8_t which has the top bit set results in a
value outside of the range allowable for a uint8_t. The process of
converting this value back to a uint8_t triggers ubsan's
implicit-conversion sanitizer.

Ensure the high order bit is stripped before shifting, so that the
shifted value fits into the allowable uint8_t range.

This change is necessary to enable integer sanitization on this code.

Somewhat related to Bug: 122975762
Test: atest ziparchive-tests

Change-Id: I940c8b2828ac88348d80f731274b990e35de6631