[Bug binutils/21158] New: objdump - of-by-one global-buffer-overflow

[thuanpv at comp dot nus.edu.sg]

https://sourceware.org/bugzilla/show_bug.cgi?id=21158

            Bug ID: 21158
           Summary: objdump - of-by-one global-buffer-overflow
           Product: binutils
           Version: 2.29 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: thuanpv at comp dot nus.edu.sg
  Target Milestone: ---

Created attachment 9825
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9825&action=edit
Bug triggering input

Dear all,

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

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
61697d017e114d7667fbb340fb73f8184d48ee5a (Tue Feb 14 00:00:30 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 - objdump_bug_2
objdump -g objdump_bug_2


ASAN says:
==34445==ERROR: AddressSanitizer: global-buffer-overflow on address
0x000001d1cc3f at pc 0x621346 bp 0x7ffe1e819070 sp 0x7ffe1e819068
READ of size 1 at 0x000001d1cc3f thread T0
    #0 0x621345 in read_symbol_stabs_debugging_info
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/rddbg.c:303
    #1 0x61aecd in read_debugging_info
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/rddbg.c:62
    #2 0x498f7b in dump_bfd
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3513
    #3 0x4978fb in display_object_bfd
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3564
    #4 0x497698 in display_any_bfd
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3653
    #5 0x495ebe in display_file
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3674
    #6 0x493edd in main
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3969
    #7 0x7fdc72255f44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44)
    #8 0x48c95c in _start
(/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/objdump+0x48c95c)

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