Hi,
I was working on code that adds an ELF section containing custom
metadata to ELF binaries when I started getting odd segfaults
in the added-to binary.
I've managed to create a minimal reproducer with a couple interesting
discoveries. The reproducer is available here:
https://github.com/danobi/elf-segfault
Basically it does a noop round trip between elf_begin() and elf_update().
But the resulting binary, when run, outputs:
$ ./testprog_copy
fish: Job 1, './testprog_copy' terminated by signal SIGSEGV (Address
boundary error)
Furthermore, I built and ran tests/addsections.c [0] against my testbinary
and I still get:
$ ./testprog_copy_elfutils
fish: Job 1, './testprog_copy_elfutils' terminated by signal SIGSEGV
(Address boundary error)
I've also tried linking against upstream libelf built from source
with the same results.
This leads me to believe I'm doing something very wrong or
I'm hitting a bug.
If it's helps, I'm using elfutils on archlinux with the following
package information:
$ pacman -Qi libelf
Name : libelf
Version : 0.190-1
Description : Handle ELF object files and DWARF debugging
information (libraries)
Architecture : x86_64
URL : https://sourceware.org/elfutils/
[...]
[0]:
https://sourceware.org/git/?p=elfutils.git;a=blob;f=tests/addsections.c;hb=HEAD
Thanks,
Daniel
