[Bug binutils/21414] New: Segfault in objcopy

[dungnguy at comp dot nus.edu.sg]

https://sourceware.org/bugzilla/show_bug.cgi?id=21414

            Bug ID: 21414
           Summary: Segfault in objcopy
           Product: binutils
           Version: 2.28
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: dungnguy at comp dot nus.edu.sg
  Target Milestone: ---
  Attachment #10010 1
       is obsolete:

Dear All,

This bug was found with AFLGo, a directed version of AFL/AFLFast. Thanks also
to Marcel Böhme and Van-Thuan Pham.

This bug was found on Ubuntu 14.04 64-bit & binutils was checked out from main
repository at git://sourceware.org/git/binutils-gdb.git. Its commit is
a6c21d4a553de184562fd8409a5bcd3f2cc2561a (Wed Apr 19 13:16:05 2017).

binutils was built with ASAN using gcc-6.2 and clang-3.4. The configure command
was:

CC=clang CFLAGS="-DFORTIFY_SOURCE=2 -fstack-protector-all
-fsanitize=undefined,address -fno-omit-frame-pointer -g -Wno-error"
../configure --disable-shared --disable-gdb --disable-libdecnumber
--disable-readline --disable-sim

To reproduce:
Download the attached file - bug_11
objcopy -Gs bug_11

ASAN says:
../../binutils/objcopy.c:1555:52: runtime error: member access within null
pointer of type 'struct bfd_symbol'
ASAN:SIGSEGV
=================================================================
==149416==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000018 (pc
0x00000051cdca bp 0x7ffec2588b50 sp 0x7ffec2588100 T0)
    #0 0x51cdc9 in filter_symbols
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objcopy.c:1553:16
    #1 0x501ddb in copy_object
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objcopy.c:2840:18
    #2 0x4ebe2c in copy_file
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objcopy.c:3333:13
    #3 0x4d6716 in copy_main
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objcopy.c:5266:3
    #4 0x4cac8a in main
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objcopy.c:5367:5
    #5 0x7fbb012eff44 in __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:287
    #6 0x4ca31c in _start
(/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/objcopy+0x4ca31c)


VALGRIND says:
==148414== Invalid read of size 4
==148414==    at 0x404481: filter_symbols (objcopy.c:1555)
==148414==    by 0x4077D5: copy_object (objcopy.c:2840)
==148414==    by 0x408AED: copy_file (objcopy.c:3333)
==148414==    by 0x40C8B8: copy_main (objcopy.c:5266)
==148414==    by 0x40CBE5: main (objcopy.c:5367)
==148414==  Address 0x18 is not stack'd, malloc'd or (recently) free'd
==148414== 
==148414== 
==148414== Process terminating with default action of signal 11 (SIGSEGV)
==148414==  Access not within mapped region at address 0x18
==148414==    at 0x404481: filter_symbols (objcopy.c:1555)
==148414==    by 0x4077D5: copy_object (objcopy.c:2840)
==148414==    by 0x408AED: copy_file (objcopy.c:3333)
==148414==    by 0x40C8B8: copy_main (objcopy.c:5266)
==148414==    by 0x40CBE5: main (objcopy.c:5367)

--- Comment #1 from Manh-Dung Nguyen <dungnguy at comp dot nus.edu.sg> ---
Created attachment 10011
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10011&action=edit
Crashing input

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