[llvm-bugs] [Bug 34949] New: Misscalculated PE header value

via llvm-bugs llvm-bugs at lists.llvm.org
Sat Oct 14 10:44:52 PDT 2017


            Bug ID: 34949
           Summary: Misscalculated PE header value
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: COFF
          Assignee: unassignedbugs at nondot.org
          Reporter: ege.balci at invictuseurope.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 19275
  --> https://bugs.llvm.org/attachment.cgi?id=19275&action=edit
Miscalculated SizeOfImage value

Recently putty project (http://www.putty.org/) switched to building with clang
and lld instead of Microsoft's toolchain. Their latest released PE 32 bit
binary (https://the.earth.li/~sgtatham/putty/latest/w32/putty.exe) seems to has
faulty SizeOfImage value on the PE header, if you check the actual size of the
PE image just after mapping it on the memory it does not add up to the header
value. This bug causes packers like UPX to crash while trying to parse the PE
file. I sent a email to the putty team and they sad it should be about the lld

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