[llvm-bugs] [Bug 34241] New: AARCH64 ELF binary section invalid pointer

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34241

            Bug ID: 34241
           Summary: AARCH64 ELF binary section invalid pointer
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: w.parker.thompson at gmail.com
                CC: llvm-bugs at lists.llvm.org

When accessing a SectionRef::getContents() StringRef, the initial pointer is
valid, and length is correct but the memory mapped at the pointer is not large
enough for the length supplied.  It's possible that the data pointer is
misaligned.  When accessing memory near the end of the section pointer it will
causes a invalid access and crash.

Attached is a sample binary that causes a crash, the invalid section in the
'.bss' in this case.

In order to reproduce: llvm-objdump -disassemble-all /path/to/attachment

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