[llvm-bugs] [Bug 32968] New: posix_memalign should return ENOMEM when allocation fails under allocator_may_return_null=1

via llvm-bugs llvm-bugs at lists.llvm.org
Mon May 8 08:32:12 PDT 2017


https://bugs.llvm.org/show_bug.cgi?id=32968

            Bug ID: 32968
           Summary: posix_memalign should return ENOMEM when allocation
                    fails under allocator_may_return_null=1
           Product: new-bugs
           Version: 3.8
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: tim.g.armstrong at gmail.com
                CC: llvm-bugs at lists.llvm.org

ASAN's posix_memalign() should return ENOMEM when the allocation fails due to
lack of memory.

I can reproduce this reliably by making a huge allocation (e.g. 2^48 bytes)
with ASAN_OPTIONS including allocator_may_return_null=1. A null pointer is
returned via the output argument but the return value is 0 (which means
success).

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