[Bug ld/11946] New: Invalid memory access in ELF before_allocation

[hjl dot tools at gmail dot com]

address@hidden pr11939]$ cat x.s

address@hidden pr11939]$ as -o x.o x.s
address@hidden pr11939]$ valgrind --tool=memcheck ld  x.o -b binary binary
==23971== Memcheck, a memory error detector
==23971== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==23971== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==23971== Command: ld x.o -b binary binary
==23971== 
==23971== Conditional jump or move depends on uninitialised value(s)
==23971==    at 0x41C174: gldelf_x86_64_before_allocation (eelf_x86_64.c:1342)
==23971==    by 0x411CF8: lang_process (ldlang.c:6395)
==23971==    by 0x4152B9: main (ldmain.c:524)
==23971== 
ld: warning: cannot find entry symbol _start; defaulting to 0000000000400078
==23971== 
==23971== HEAP SUMMARY:
==23971==     in use at exit: 168,517 bytes in 610 blocks
==23971==   total heap usage: 657 allocs, 47 frees, 294,775 bytes allocated
==23971== 
==23971== LEAK SUMMARY:
==23971==    definitely lost: 10,907 bytes in 100 blocks
==23971==    indirectly lost: 0 bytes in 0 blocks
==23971==      possibly lost: 15,079 bytes in 263 blocks
==23971==    still reachable: 142,531 bytes in 247 blocks
==23971==         suppressed: 0 bytes in 0 blocks
==23971== Rerun with --leak-check=full to see details of leaked memory
==23971== 
==23971== For counts of detected and suppressed errors, rerun with: -v
==23971== Use --track-origins=yes to see where uninitialised values come from
==23971== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 6 from 6)

The problem is in gld${EMULATION_NAME}_before_allocation:

  for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
    {    
      const char *audit_libs = elf_dt_audit (abfd);

We should check if input is ELF first.

-- 
           Summary: Invalid memory access in ELF before_allocation
           Product: binutils
           Version: 2.21 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: hjl dot tools at gmail dot com
                CC: bug-binutils at gnu dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=11946

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