| Summary: | readelf segfault - multiple invalid write in elfcomm.c | ||
|---|---|---|---|
| Product: | binutils | Reporter: | Thuan Pham <thuanpv> |
| Component: | binutils | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | nickc |
| Priority: | P2 | ||
| Version: | 2.29 | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Last reconfirmed: | ||
| Attachments: | Crashing input | ||
Created attachment 9813 [details] 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 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_12 readelf -R6 bug_12 Valgrinds: ==115836== Invalid write of size 1 ==115836== at 0x438C87: byte_put_little_endian (elfcomm.c:75) ==115836== by 0x408B97: target_specific_reloc_handling (readelf.c:11640) ==115836== by 0x408B97: apply_relocations (readelf.c:12343) ==115836== by 0x40EAC6: dump_section_as_bytes (readelf.c:12744) ==115836== by 0x42334D: process_section_contents (readelf.c:13085) ==115836== by 0x42334D: process_object (readelf.c:16780) ==115836== by 0x402111: process_file (readelf.c:17154) ==115836== by 0x402111: main (readelf.c:17225) ==115836== Address 0x5203a08 is 19 bytes after a block of size 5 alloc'd ==115836== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==115836== by 0x40566E: get_data (readelf.c:393) ==115836== by 0x40E7EB: dump_section_as_bytes (readelf.c:12685) ==115836== by 0x42334D: process_section_contents (readelf.c:13085) ==115836== by 0x42334D: process_object (readelf.c:16780) ==115836== by 0x402111: process_file (readelf.c:17154) ==115836== by 0x402111: main (readelf.c:17225) ==115836== ==115836== Invalid write of size 1 ==115836== at 0x438C91: byte_put_little_endian (elfcomm.c:78) ==115836== by 0x408B97: target_specific_reloc_handling (readelf.c:11640) ==115836== by 0x408B97: apply_relocations (readelf.c:12343) ==115836== by 0x40EAC6: dump_section_as_bytes (readelf.c:12744) ==115836== by 0x42334D: process_section_contents (readelf.c:13085) ==115836== by 0x42334D: process_object (readelf.c:16780) ==115836== by 0x402111: process_file (readelf.c:17154) ==115836== by 0x402111: main (readelf.c:17225) ==115836== Address 0x5203a07 is 18 bytes after a block of size 5 alloc'd ==115836== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==115836== by 0x40566E: get_data (readelf.c:393) ==115836== by 0x40E7EB: dump_section_as_bytes (readelf.c:12685) ==115836== by 0x42334D: process_section_contents (readelf.c:13085) ==115836== by 0x42334D: process_object (readelf.c:16780) ==115836== by 0x402111: process_file (readelf.c:17154) ==115836== by 0x402111: main (readelf.c:17225) ==115836== ==115836== Invalid write of size 1 ==115836== at 0x438C9B: byte_put_little_endian (elfcomm.c:81) ==115836== by 0x408B97: target_specific_reloc_handling (readelf.c:11640) ==115836== by 0x408B97: apply_relocations (readelf.c:12343) ==115836== by 0x40EAC6: dump_section_as_bytes (readelf.c:12744) ==115836== by 0x42334D: process_section_contents (readelf.c:13085) ==115836== by 0x42334D: process_object (readelf.c:16780) ==115836== by 0x402111: process_file (readelf.c:17154) ==115836== by 0x402111: main (readelf.c:17225) ==115836== Address 0x5203a06 is 17 bytes after a block of size 5 alloc'd ==115836== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==115836== by 0x40566E: get_data (readelf.c:393) ==115836== by 0x40E7EB: dump_section_as_bytes (readelf.c:12685) ==115836== by 0x42334D: process_section_contents (readelf.c:13085) ==115836== by 0x42334D: process_object (readelf.c:16780) ==115836== by 0x402111: process_file (readelf.c:17154) ==115836== by 0x402111: main (readelf.c:17225) ==115836== ==115836== Invalid write of size 1 ==115836== at 0x438C9E: byte_put_little_endian (elfcomm.c:84) ==115836== by 0x408B97: target_specific_reloc_handling (readelf.c:11640) ==115836== by 0x408B97: apply_relocations (readelf.c:12343) ==115836== by 0x40EAC6: dump_section_as_bytes (readelf.c:12744) ==115836== by 0x42334D: process_section_contents (readelf.c:13085) ==115836== by 0x42334D: process_object (readelf.c:16780) ==115836== by 0x402111: process_file (readelf.c:17154) ==115836== by 0x402111: main (readelf.c:17225) ==115836== Address 0x5203a05 is 16 bytes after a block of size 5 alloc'd ==115836== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==115836== by 0x40566E: get_data (readelf.c:393) ==115836== by 0x40E7EB: dump_section_as_bytes (readelf.c:12685) ==115836== by 0x42334D: process_section_contents (readelf.c:13085) ==115836== by 0x42334D: process_object (readelf.c:16780) ==115836== by 0x402111: process_file (readelf.c:17154) ==115836== by 0x402111: main (readelf.c:17225) ASAN says ==106328==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000ef08 at pc 0x722a9d bp 0x7ffd0053e0b0 sp 0x7ffd0053e0a8 WRITE of size 1 at 0x60200000ef08 thread T0 #0 0x722a9c in byte_put_little_endian /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/elfcomm.c:75 #1 0x54acfa in target_specific_reloc_handling /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:11640 #2 0x52e6dc in apply_relocations /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:12343 #3 0x55de03 in dump_section_as_bytes /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:12744 #4 0x4e1531 in process_section_contents /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:13085 #5 0x48d610 in process_object /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:16780 #6 0x488365 in process_file /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17154 #7 0x4855c3 in main /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17225 #8 0x7f1ce3bfbf44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44) #9 0x47ddfc in _start (/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/readelf+0x47ddfc)