[Bug binutils/21149] New: readelf - several invalid read

[thuanpv at comp dot nus.edu.sg]

https://sourceware.org/bugzilla/show_bug.cgi?id=21149

            Bug ID: 21149
           Summary: readelf - several invalid read
           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 9816
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9816&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 checkout from main
repository at git://sourceware.org/git/binutils-gdb.git. Its commit is
53f7e8ea7fad1fcff1b58f4cbd74e192e0bcbc1d (Fri Feb 10 00:00:16 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_15
readelf -zxt bug_15


Valgrind says:
==81060== Invalid read of size 1
==81060==    at 0x438D7C: byte_get_little_endian (elfcomm.c:211)
==81060==    by 0x408707: get_compression_header (readelf.c:5735)
==81060==    by 0x40EADA: dump_section_as_bytes (readelf.c:12700)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060==  Address 0x5203c62 is 0 bytes after a block of size 18 alloc'd
==81060==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==81060==    by 0x40566E: get_data (readelf.c:393)
==81060==    by 0x40E7EB: dump_section_as_bytes (readelf.c:12685)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060== 
==81060== Invalid read of size 1
==81060==    at 0x438D92: byte_get_little_endian (elfcomm.c:212)
==81060==    by 0x408707: get_compression_header (readelf.c:5735)
==81060==    by 0x40EADA: dump_section_as_bytes (readelf.c:12700)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060==  Address 0x5203c63 is 1 bytes after a block of size 18 alloc'd
==81060==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==81060==    by 0x40566E: get_data (readelf.c:393)
==81060==    by 0x40E7EB: dump_section_as_bytes (readelf.c:12685)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060== 
==81060== Invalid read of size 1
==81060==    at 0x438D9D: byte_get_little_endian (elfcomm.c:213)
==81060==    by 0x408707: get_compression_header (readelf.c:5735)
==81060==    by 0x40EADA: dump_section_as_bytes (readelf.c:12700)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060==  Address 0x5203c64 is 2 bytes after a block of size 18 alloc'd
==81060==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==81060==    by 0x40566E: get_data (readelf.c:393)
==81060==    by 0x40E7EB: dump_section_as_bytes (readelf.c:12685)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060== 
==81060== Invalid read of size 1
==81060==    at 0x438DA8: byte_get_little_endian (elfcomm.c:214)
==81060==    by 0x408707: get_compression_header (readelf.c:5735)
==81060==    by 0x40EADA: dump_section_as_bytes (readelf.c:12700)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060==  Address 0x5203c65 is 3 bytes after a block of size 18 alloc'd
==81060==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==81060==    by 0x40566E: get_data (readelf.c:393)
==81060==    by 0x40E7EB: dump_section_as_bytes (readelf.c:12685)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060== 
==81060== Invalid read of size 1
==81060==    at 0x438DB3: byte_get_little_endian (elfcomm.c:215)
==81060==    by 0x408707: get_compression_header (readelf.c:5735)
==81060==    by 0x40EADA: dump_section_as_bytes (readelf.c:12700)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060==  Address 0x5203c66 is 4 bytes after a block of size 18 alloc'd
==81060==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==81060==    by 0x40566E: get_data (readelf.c:393)
==81060==    by 0x40E7EB: dump_section_as_bytes (readelf.c:12685)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060== 
==81060== Invalid read of size 1
==81060==    at 0x438DBE: byte_get_little_endian (elfcomm.c:216)
==81060==    by 0x408707: get_compression_header (readelf.c:5735)
==81060==    by 0x40EADA: dump_section_as_bytes (readelf.c:12700)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)
==81060==  Address 0x5203c67 is 5 bytes after a block of size 18 alloc'd
==81060==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==81060==    by 0x40566E: get_data (readelf.c:393)
==81060==    by 0x40E7EB: dump_section_as_bytes (readelf.c:12685)
==81060==    by 0x42332E: process_section_contents (readelf.c:13082)
==81060==    by 0x42332E: process_object (readelf.c:16780)
==81060==    by 0x402111: process_file (readelf.c:17154)
==81060==    by 0x402111: main (readelf.c:17225)


ASAN says:
==71214==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x60300000ef92 at pc 0x7269ba bp 0x7fff700914d0 sp 0x7fff700914c8
READ of size 1 at 0x60300000ef92 thread T0
    #0 0x7269b9 in byte_get_little_endian
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/elfcomm.c:209
    #1 0x5662f4 in get_compression_header
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:5735
    #2 0x55c685 in dump_section_as_bytes
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:12701
    #3 0x4e1320 in process_section_contents
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:13082
    #4 0x48d610 in process_object
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:16780
    #5 0x488365 in process_file
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17154
    #6 0x4855c3 in main
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17225
    #7 0x7f838215af44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44)
    #8 0x47ddfc in _start
(/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/readelf+0x47ddfc)

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