https://sourceware.org/bugzilla/show_bug.cgi?id=28720
--- Comment #3 from Evgeny Vereshchagin <evvers at ya dot ru> --- As far as I can see with the fuzz branch rebased on top on my fuzzing branch almost all the issues including https://sourceware.org/pipermail/elfutils-devel/2021q4/004596.html are gone. Thanks! I'll attach files triggering the remaining issues shortly: ``` $ UBSAN_OPTIONS=print_stacktrace=1:print_summary=1:halt_on_error=1 LD_LIBRARY_PATH="./libdw;./libelf" ./src/stack --core SIGABRT.PC.7fffe4f4e84c.STACK.18f0f46b60.CODE.-6.ADDR.0.INSTR.mov____%eax,%ebp.fuzz link_map.c:1040:20: runtime error: variable length array bound evaluates to non-positive value 0 #0 0x7fbc58f053e9 in dwfl_link_map_report /home/vagrant/elfutils/libdwfl/link_map.c:1040 #1 0x7fbc59023fa7 in _new.dwfl_core_file_report /home/vagrant/elfutils/libdwfl/core-file.c:552 #2 0x4053f7 in parse_opt /home/vagrant/elfutils/src/stack.c:595 #3 0x7fbc581d9471 in argp_parse (/lib64/libc.so.6+0x11e471) #4 0x404b39 in main /home/vagrant/elfutils/src/stack.c:695 #5 0x7fbc580e855f in __libc_start_call_main (/lib64/libc.so.6+0x2d55f) #6 0x7fbc580e860b in __libc_start_main_impl (/lib64/libc.so.6+0x2d60b) #7 0x404fa4 in _start (/home/vagrant/elfutils/src/stack+0x404fa4) SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior link_map.c:1040:20 in ``` ``` $ UBSAN_OPTIONS=print_stacktrace=1:print_summary=1:halt_on_error=1 LD_LIBRARY_PATH="./libdw;./libelf" ./src/stack --core SIGABRT.PC.7fffe4f4e84c.STACK.1976b2f3ff.CODE.-6.ADDR.0.INSTR.mov____%eax,%ebp.fuzz gelf_xlate.h:48:1: runtime error: member access within misaligned address 0x7f0817719077 for type 'struct Elf32_Dyn', which requires 4 byte alignment 0x7f0817719077: note: pointer points here 00 10 00 00 00 00 00 00 00 00 02 01 00 00 00 00 00 00 7f 45 46 4c 46 00 00 01 01 00 01 00 08 00 ^ #0 0x7f0822689542 in Elf32_cvt_Dyn /home/vagrant/elfutils/libelf/gelf_xlate.h:48 #1 0x7f082268835e in elf32_xlatetom /home/vagrant/elfutils/libelf/elf32_xlatetom.c:104 #2 0x7f0819563307 in dwfl_segment_report_module /home/vagrant/elfutils/libdwfl/dwfl_segment_report_module.c:848 #3 0x7f081956c06c in _new.dwfl_core_file_report /home/vagrant/elfutils/libdwfl/core-file.c:563 #4 0x4053f7 in parse_opt /home/vagrant/elfutils/src/stack.c:595 #5 0x7f0818721471 in argp_parse (/lib64/libc.so.6+0x11e471) #6 0x404b39 in main /home/vagrant/elfutils/src/stack.c:695 #7 0x7f081863055f in __libc_start_call_main (/lib64/libc.so.6+0x2d55f) #8 0x7f081863060b in __libc_start_main_impl (/lib64/libc.so.6+0x2d60b) #9 0x404fa4 in _start (/home/vagrant/elfutils/src/stack+0x404fa4) SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior gelf_xlate.h:48:1 in ``` -- You are receiving this mail because: You are on the CC list for the bug.
