[Bug binutils/21415] New: global-buffer-overflow in objdump

[dungnguy at comp dot nus.edu.sg]

https://sourceware.org/bugzilla/show_bug.cgi?id=21415

            Bug ID: 21415
           Summary: global-buffer-overflow in objdump
           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: ---

Created attachment 10012
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10012&action=edit
Bug triggering input

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_13
objdump -S bug_13

ASAN says:
==148418==ERROR: AddressSanitizer: global-buffer-overflow on address
0x0000020f7518 at pc 0x0000008c32d8 bp 0x7ffe53508eb0 sp 0x7ffe53508ea8
READ of size 8 at 0x0000020f7518 thread T0
    #0 0x8c32d7 in OP_G
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/opcodes/../../opcodes/i386-dis.c:15562:7
    #1 0x88bbf0 in print_insn
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/opcodes/../../opcodes/i386-dis.c:13326:3
    #2 0x891ff8 in print_insn_i386
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/opcodes/../../opcodes/i386-dis.c:12562:10
    #3 0x509983 in disassemble_bytes
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:1864:17
    #4 0x4f6b0a in disassemble_section
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:2304:7
    #5 0x9e4315 in bfd_map_over_sections
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/bfd/../../bfd/section.c:1395:5
    #6 0x4e4f50 in disassemble_data
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:2438:3
    #7 0x4d76be in dump_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3532:5
    #8 0x4d5fe8 in display_object_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3589:7
    #9 0x4d5dcc in display_any_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3678:5
    #10 0x4d45f3 in display_file
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3699:3
    #11 0x4d26d3 in main
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:4001:6
    #12 0x7ffb11701f44 in __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:287
    #13 0x4cb13c in _start
(/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/objdump+0x4cb13c)

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