https://sourceware.org/bugzilla/show_bug.cgi?id=24084
Bug ID: 24084
Summary: Negative-size-param when when calling memcpy function
in elf_cvt_note function in libelf the latest
elfutils-0.174 code base, this inputs will cause the
segment faults and I have confirmed them with address
sanitizer too. Please use the ".//eu-elflint -
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: backends
Assignee: unassigned at sourceware dot org
Reporter: wcventure at 126 dot com
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Created attachment 11530
--> https://sourceware.org/bugzilla/attachment.cgi?id=11530&action=edit
POC
Hi there,
Negative-size-param when calling memcpy function in elf_cvt_note function in
libelf the latest elfutils-0.174 code base, this inputs will cause the segment
faults and I have confirmed them with address sanitizer too.
Please use the ".//eu-elflint -d $POC"to reproduce the bug. If you have any
questions, please let me know.
git log
> commit 1dabad36ee28aa76b8cf14b6426b379cabee6def
> Author: Jim Wilson <j...@sifive.com>
> Date: Thu Dec 27 15:25:49 2018 -0800
>
> RISC-V: Improve riscv64 core file support.
>
> This fixes two problems. The offset for x1 is changed from 1 to 8 because
> this is a byte offset not a register skip count. Support for reading the
> PC value is added. This requires changing the testsuite to match the new
> readelf output for coredumps.
>
> Signed-off-by: Jim Wilson <j...@sifive.com>
The ASAN dumps the stack trace as follows:
> =================================================================
> ==24780==ERROR: AddressSanitizer: negative-size-param: (size=-4)
> #0 0x7f23f4234853 (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x79853)
> #1 0x7f23f3edaa2c in memcpy
> /usr/include/x86_64-linux-gnu/bits/string3.h:53
> #2 0x7f23f3edaa2c in elf_cvt_note /elfutils/libelf/note_xlate.h:63
> #3 0x7f23f3edaa2c in elf_cvt_note4 /elfutils/libelf/note_xlate.h:79
> #4 0x7f23f3f2ed30 in convert_data /elfutils/libelf/elf_getdata.c:204
> #5 0x7f23f3f2ed30 in __libelf_set_data_list_rdlock
> /elfutils/libelf/elf_getdata.c:447
> #6 0x7f23f3f301bf in __elf_getdata_rdlock
> /elfutils/libelf/elf_getdata.c:554
> #7 0x469a22 in check_note_section /elfutils/src/elflint.c:4428
> #8 0x469a22 in check_sections /elfutils/src/elflint.c:4182
> #9 0x47a222 in process_elf_file /elfutils/src/elflint.c:4774
> #10 0x47a222 in process_file /elfutils/src/elflint.c:242
> #11 0x4030d5 in main /elfutils/src/elflint.c:175
> #12 0x7f23f38d182f in __libc_start_main
> (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
> #13 0x404718 in _start (/elfutils/build/bin/eu-elflint+0x404718)
>
> Address 0x7f23f52b3b30 is a wild pointer.
> SUMMARY: AddressSanitizer: negative-size-param
> (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x79853)
> ==24780==ABORTING
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