https://sourceware.org/bugzilla/show_bug.cgi?id=23782
Bug ID: 23782 Summary: Negative-size-param problem in dwfl_getmodules.c in libdw, please use the POC to reproduce this bug. Product: elfutils Version: unspecified Status: UNCONFIRMED Severity: normal Priority: P2 Component: libdw Assignee: unassigned at sourceware dot org Reporter: wcventure at 126 dot com CC: elfutils-devel at sourceware dot org Target Milestone: --- Created attachment 11331 --> https://sourceware.org/bugzilla/attachment.cgi?id=11331&action=edit POC1 Hi, We are doing research on fuzz testing and our fuzzer caught a Negative-size-param problem in the latest elfutils(v0.174) code base. The funciton dwfl_getmodules in dwfl_getmodules.c library does not ensure a non-negative size. Those inputs will cause the Negative-size-param Problem, Segmentation fault. I have confirmed them with address sanitizer. Please use the “ ./eu-readelf $POC -w ” to reproduce the bug. If you have any questions, please let me know. Thank you. The ASAN dumps the stack trace as follows: ==31028==ERROR: AddressSanitizer: negative-size-param: (size=-4) #0 0x7ff2abbf4866 (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x41866) #1 0x4973ad in print_debug_frame_section /media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/readelf.c:6626 #2 0x4598f3 in print_debug /media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/readelf.c:11160 #3 0x45e00a in process_elf_file /media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/readelf.c:996 #4 0x45e00a in process_dwflmod /media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/readelf.c:760 #5 0x7ff2ab8be2f4 in dwfl_getmodules /media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/libdwfl/dwfl_getmodules.c:86 #6 0x40d055 in process_file /media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/readelf.c:868 #7 0x4058f1 in main /media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/readelf.c:350 #8 0x7ff2aaf4682f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f) #9 0x4064d8 in _start (/media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/build/bin/eu-readelf+0x4064d8) Address 0x7ff2acca407d is a wild pointer. SUMMARY: AddressSanitizer: negative-size-param (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x41866) ==31028==ABORTING Aborted -- You are receiving this mail because: You are on the CC list for the bug.