Created attachment 14832 [details] Full logs and the object file Git commit hash: 93c6e8c3c14bf81020ca7571fe752250a34f5bc9 This looks duplicate to #30361 but I'm not very sure as they have different backtraces. Steps to reproduce: ``` export CC=afl-clang-fast export CXX=afl-clang-fast++ export AFL_USE_ASAN=1 export CFLAGS="-latomic --ld-path=/usr/bin/ld.lld-14" export CFLAGS_FOR_TARGETS="-latomic --ld-path=/usr/bin/ld.lld-14" export CXXFLAGS="-latomic --ld-path=/usr/bin/ld.lld-14" ./configure make -j ./binutils/objdump -g /path/to/obj ``` Note this doesn't have to be reproduced with AFL++ but gdbserver fails to build with just specifying `CFLAGS=-fsanitize=address` due to `-Wl,--no-undefined`, which `afl-clang-fast++` will handle automatically and make things easy. ASAN logs: ``` <some objdump logs...> ./binutils/objdump: Error: read LEB value is too large to store in destination variable ================================================================= ==458591==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60c0000000fc at pc 0x56089ff64c6d bp 0x7ffda41556a0 sp 0x7ffda4155698 READ of size 1 at 0x60c0000000fc thread T0 #0 0x56089ff64c6c in byte_get_little_endian /binutils/binutils/elfcomm.c:118:26 #1 0x56089ff06020 in fetch_indexed_string /binutils/binutils/./dwarf.c:683:16 #2 0x56089ff00972 in read_and_display_attr_value /binutils/binutils/./dwarf.c:2677:12 #3 0x56089feb3d56 in read_and_display_attr /binutils/binutils/./dwarf.c:3478:10 #4 0x56089feb3d56 in process_debug_info /binutils/binutils/./dwarf.c:4079:15 #5 0x56089feeea22 in display_debug_types /binutils/binutils/./dwarf.c:7572:10 #6 0x56089fe947ab in dump_dwarf_section /binutils/binutils/./objdump.c:4425:6 #7 0x5608a0043feb in bfd_map_over_sections /binutils/bfd/section.c:1366:5 #8 0x56089fe92cde in dump_dwarf /binutils/binutils/./objdump.c:4463:3 #9 0x56089fe8ff91 in dump_bfd /binutils/binutils/./objdump.c:5707:4 #10 0x56089fe8cd98 in display_object_bfd /binutils/binutils/./objdump.c #11 0x56089fe8cd98 in display_any_bfd /binutils/binutils/./objdump.c:5831:5 #12 0x56089fe8ab12 in display_file /binutils/binutils/./objdump.c:5852:3 #13 0x56089fe8ab12 in main /binutils/binutils/./objdump.c:6263:6 #14 0x7f73cb08ad8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16 #15 0x7f73cb08ae3f in __libc_start_main csu/../csu/libc-start.c:392:3 #16 0x56089fdca484 in _start (/binutils/binutils/objdump+0x2ea484) (BuildId: 58d40a2c01ab14b9) 0x60c0000000fc is located 4 bytes to the left of 113-byte region [0x60c000000100,0x60c000000171) allocated by thread T0 here: #0 0x56089fe4d2ce in malloc (/binutils/binutils/objdump+0x36d2ce) (BuildId: 58d40a2c01ab14b9) #1 0x5608a033a978 in xmalloc /binutils/libiberty/./xmalloc.c:149:12 #2 0x56089feb0111 in load_debug_section_with_follow /binutils/binutils/./dwarf.c:3496:7 #3 0x56089feb0111 in process_debug_info /binutils/binutils/./dwarf.c:3665:7 #4 0x56089fecabbf in display_debug_info /binutils/binutils/./dwarf.c:7566:10 SUMMARY: AddressSanitizer: heap-buffer-overflow /binutils/binutils/elfcomm.c:118:26 in byte_get_little_endian Shadow bytes around the buggy address: 0x0c187fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c187fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c187fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c187fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c187fff8000: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd =>0x0c187fff8010: fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa[fa] 0x0c187fff8020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 fa 0x0c187fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c187fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c187fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c187fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==458591==ABORTING ``` See attached for the full logs. System environment: ``` [afl++ amdsuplus3] /binutils ((93c6e8c3c14...)) # clang --version Ubuntu clang version 14.0.6 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin [afl++ amdsuplus3] /binutils ((93c6e8c3c14...)) # clang++ --version Ubuntu clang version 14.0.6 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin [afl++ amdsuplus3] /binutils ((93c6e8c3c14...)) # ld.lld-14 --version Ubuntu LLD 14.0.6 (compatible with GNU linkers) [afl++ amdsuplus3] /binutils ((93c6e8c3c14...)) # uname -a Linux amdsuplus3.inf.ethz.ch 5.4.0-146-generic #163-Ubuntu SMP Fri Mar 17 18:26:02 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux [afl++ amdsuplus3] /binutils ((93c6e8c3c14...)) # ```
Dup *** This bug has been marked as a duplicate of bug 30361 ***