https://sourceware.org/bugzilla/show_bug.cgi?id=26734
Bug ID: 26734
Summary: ELF saving fails for an AARCH64 binary built with
-mbranch-protection=standard
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libelf
Assignee: unassigned at sourceware dot org
Reporter: mliska at suse dot cz
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Created attachment 12897
--> https://sourceware.org/bugzilla/attachment.cgi?id=12897&action=edit
Problematic binary
The following code snippet fails (isolated from debugedit.c from rpm package):
$ cat demo.c
#include <libelf.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <error.h>
int main(int argc, char **argv)
{
elf_version (EV_CURRENT);
int fd = open (argv[1], O_RDWR);
Elf *elf = NULL;
int i;
elf = elf_begin (fd, ELF_C_RDWR, NULL);
if (elf == NULL)
{
error (0, 0, "cannot open ELF file: %s", elf_errmsg (-1));
exit (1);
}
if (elf_update (elf, ELF_C_NULL) < 0)
{
fprintf (stderr, "Failed to update file: %s\n",
elf_errmsg (elf_errno ()));
exit (1);
}
}
I used latest elfutils libelf.so:
$ gcc demo.c -lelf &&
LD_PRELOAD=/home/marxin/Programming/elfutils/libelf/libelf.so ./a.out
/tmp/authvar
Failed to update file: invalid section entry size
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