8306561: Possible out of bounds access in print_pointer_information

8319542: Fix boundaries of region to be tested with os::is_readable_range

Reviewed-by: mbaesken
Backport-of: d6ce62ebc01eb483b486af886d9b79f60ff87de1

Author: RealCLanger

src/hotspot/share/services/mallocTracker.cpp

@@ -211,7 +211,8 @@ bool MallocTracker::print_pointer_information(const void* p, outputStream* st) {
     const uint8_t* here = align_down(addr, smallest_possible_alignment);
     const uint8_t* const end = here - (0x1000 + sizeof(MallocHeader)); // stop searching after 4k
     for (; here >= end; here -= smallest_possible_alignment) {
-      if (!os::is_readable_pointer(here)) {
+      // JDK-8306561: cast to a MallocHeader needs to guarantee it can reside in readable memory
+      if (!os::is_readable_range(here, here + sizeof(MallocHeader))) {
         // Probably OOB, give up
         break;
       }

test/hotspot/jtreg/ProblemList.txt

@@ -137,9 +137,6 @@ serviceability/attach/ConcAttachTest.java 8290043 linux-all
 
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-gtest/GTestWrapper.java 8306561 aix-ppc64
-gtest/NMTGtests.java#nmt-detail 8306561 aix-ppc64
-gtest/NMTGtests.java#nmt-summary 8306561 aix-ppc64
 
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