[Bug binutils/22426] New: objcopy with fabricated file

[yeokaiyeat at hotmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=22426

            Bug ID: 22426
           Summary: objcopy with fabricated file
           Product: binutils
           Version: 2.29
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: yeokaiyeat at hotmail dot com
  Target Milestone: ---

Created attachment 10584
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10584&action=edit
testcase that crashes objcopy

hello, during a fuzzing attempt on objcopy in binutils (2.26.1), fuzzed file
produces a crash when a certain fuzzed input is given. The same file is tested
again in binutils build 2.29.59.20171104

the error produced are as follows:

./objcopy: stYS7rQI : attempt to write out unknown reloc type
./objcopy:stYS7rQI: Invalid operation

===================================================================
==8555==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 9 byte(s) in 1 object(s) allocated from:
    #0 0x7fdaf84d3602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602
    #1 0xa755ec in xmalloc xmalloc.c:147

SUMMARY: AddressSanitizer: 9 byte(s) leaked in 1 allocation(s).

attached is the test case

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