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PR24225, nios2 buffer overflow

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PR 24225
	* elf32-nios2.c (nios2_elf32_relocate_section): Use asprintf and
	PRIx64 to generate warning messages.  Print local sym names too.
This commit is contained in:
Alan Modra 2019-02-18 11:57:22 +10:30
parent d57e4f2b86
commit a31b8bd9a0
2 changed files with 27 additions and 10 deletions
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6
bfd/ChangeLog
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@ -1,3 +1,9 @@
2019-02-18 Alan Modra <amodra@gmail.com>
PR 24225
* elf32-nios2.c (nios2_elf32_relocate_section): Use asprintf and
PRIx64 to generate warning messages. Print local sym names too.
2019-02-09 Vineet Gupta <vgupta@synopsys.com>
* elf32-arc (INIT_SYM_STRING): Delete.

31
bfd/elf32-nios2.c
View File

@ -3720,8 +3720,8 @@ nios2_elf32_relocate_section (bfd *output_bfd,
const char *name = NULL;
int r_type;
const char *format;
char msgbuf[256];
const char* msg = (const char*) NULL;
char *msgbuf = NULL;
char *msg = NULL;
bfd_boolean unresolved_reloc;
bfd_vma off;
int use_plt;
@ -3820,8 +3820,8 @@ nios2_elf32_relocate_section (bfd *output_bfd,
reloc_address = 0;
format = _("global pointer relative relocation at address "
"0x%08x when _gp not defined\n");
sprintf (msgbuf, format, reloc_address);
"%#" PRIx64 " when _gp not defined\n");
asprintf (&msgbuf, format, (uint64_t) reloc_address);
msg = msgbuf;
r = bfd_reloc_dangerous;
}
@ -3838,13 +3838,22 @@ nios2_elf32_relocate_section (bfd *output_bfd,
{
if (h)
name = h->root.root.string;
else
{
name = (bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link,
sym->st_name));
if (name == NULL || *name == '\0')
name = bfd_section_name (input_bfd, sec);
}
/* xgettext:c-format */
format = _("unable to reach %s (at 0x%08x) from the "
"global pointer (at 0x%08x) because the "
"offset (%d) is out of the allowed range, "
"-32678 to 32767\n" );
sprintf (msgbuf, format, name, symbol_address, gp,
(signed)relocation);
format = _("unable to reach %s (at %#" PRIx64 ") from "
"the global pointer (at %#" PRIx64 ") "
"because the offset (%" PRId64 ") is out of "
"the allowed range, -32678 to 32767\n" );
asprintf (&msgbuf, format, name,
(uint64_t) symbol_address, (uint64_t) gp,
(int64_t) relocation);
msg = msgbuf;
r = bfd_reloc_outofrange;
}
@ -4515,6 +4524,8 @@ nios2_elf32_relocate_section (bfd *output_bfd,
{
(*info->callbacks->warning) (info, msg, name, input_bfd,
input_section, rel->r_offset);
if (msgbuf)
free (msgbuf);
return FALSE;
}
}