[Bug binutils/21155] New: readelf segfault - PR 21137 seems to be incomplete

[thuanpv at comp dot nus.edu.sg]

https://sourceware.org/bugzilla/show_bug.cgi?id=21155

            Bug ID: 21155
           Summary: readelf segfault - PR 21137 seems to be incomplete
           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 9822
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9822&action=edit
Crashing 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 - bug_1
readelf -w bug_1

Valgrind says:
readelf: Error: Section 7 has invalid sh_entsize of 0000000000001118
readelf: Error: (Using the expected size of 16 for the rest of this dump)
readelf: Error: Reading 0x210 bytes extends past end of file for symbols
readelf: Warning: unable to apply unsupported reloc type 8 to section
.debug_info
readelf: Warning: unable to apply unsupported reloc type 0 to section
.debug_info
readelf: Warning: unable to apply unsupported reloc type 10 to section
.debug_info
readelf: Warning: unable to apply unsupported reloc type 53 to section
.debug_info
readelf: Warning: unable to apply unsupported reloc type 8 to section
.debug_info
readelf: Warning: unable to apply unsupported reloc type 2 to section
.debug_info
==51968== 
==51968== Process terminating with default action of signal 11 (SIGSEGV)
==51968==  Bad permissions for mapped region at address 0x5033C3D
==51968==    at 0x438EAB: byte_put_little_endian (elfcomm.c:81)
==51968==    by 0x41D538: target_specific_reloc_handling (readelf.c:11805)
==51968==    by 0x41D538: apply_relocations (readelf.c:12431)
==51968==    by 0x41E506: load_specific_debug_section (readelf.c:13021)
==51968==    by 0x4239DA: display_debug_section (readelf.c:13125)
==51968==    by 0x4239DA: process_section_contents (readelf.c:13207)
==51968==    by 0x4239DA: process_object (readelf.c:16899)
==51968==    by 0x402111: process_file (readelf.c:17273)
==51968==    by 0x402111: main (readelf.c:17344)

=================================================================
==73882==ERROR: AddressSanitizer: SEGV on unknown address 0x610fffe39dbd (pc
0x00000072497d sp 0x7ffc4e09d0a0 bp 0x7ffc4e09d350 T0)
    #0 0x72497c in byte_put_little_endian
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/elfcomm.c:81
    #1 0x54da2b in target_specific_reloc_handling
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:11805
    #2 0x52e8de in apply_relocations
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:12431
    #3 0x4847c9 in load_specific_debug_section
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:13021
    #4 0x56654c in display_debug_section
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:13125
    #5 0x4e1a7f in process_section_contents
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:13207
    #6 0x48d720 in process_object
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:16899
    #7 0x488475 in process_file
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:17273
    #8 0x4856d3 in main
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:17344
    #9 0x7f3fd362af44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44)
    #10 0x47ddfc in _start
(/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/readelf+0x47ddfc)

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