Out of Bounds Access in rtd-mdreloc-sparc.c

[Joel Sherrill]

Coverity spots an out of bounds read in rtl-mdreloc-sparc.c. Given the comment at the top that it was "Taken from NetBSD and stripped of the relocations not needed on RTEMS", I am unsure how to correlate the code back to the original to see if the issue exists upstream. Also I do not know where in the NetBSD source this came from.

​https://scan5.coverity.com/reports.htm#v29808/p10069/fileInstanceId=109360252&defectInstanceId=30967451&mergedDefectId=1255330

The long analysis ends with:

226

CID 1255330 (#1 of 1): Out-of-bounds read (OVERRUN)

14. overrun-local: Overrunning array reloc_target_bitmask of 24 4-byte elements at element index 45 (byte offset 180) using index type (which evaluates to 45).

227 mask = RELOC_VALUE_BITMASK (type);
228 value >>= RELOC_VALUE_RIGHTSHIFT (type);
229 value &= mask;