PR 33023 memory leak in objdump when specifying --endian
Alan Modra
amodra@gmail.com
Wed May 28 06:27:17 GMT 2025
* objdump.c (disassemble_data): Free modified xvec and replace
original.
diff --git a/binutils/objdump.c b/binutils/objdump.c
index 8fdbe03c4fb..43cfb796fea 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -4206,12 +4206,12 @@ disassemble_data (bfd *abfd)
abfd->arch_info = inf;
}
+ const struct bfd_target *old_xvec = NULL;
if (endian != BFD_ENDIAN_UNKNOWN)
{
- struct bfd_target *xvec;
-
- xvec = (struct bfd_target *) xmalloc (sizeof (struct bfd_target));
- memcpy (xvec, abfd->xvec, sizeof (struct bfd_target));
+ struct bfd_target *xvec = xmalloc (sizeof (*xvec));
+ old_xvec = abfd->xvec;
+ memcpy (xvec, old_xvec, sizeof (*xvec));
xvec->byteorder = endian;
abfd->xvec = xvec;
}
@@ -4225,8 +4225,7 @@ disassemble_data (bfd *abfd)
non_fatal (_("can't disassemble for architecture %s\n"),
bfd_printable_arch_mach (bfd_get_arch (abfd), 0));
exit_status = 1;
- free (sorted_syms);
- return;
+ goto out;
}
disasm_info.flavour = bfd_get_flavour (abfd);
@@ -4280,8 +4279,15 @@ disassemble_data (bfd *abfd)
free (disasm_info.dynrelbuf);
disasm_info.dynrelbuf = NULL;
- free (sorted_syms);
disassemble_free_target (&disasm_info);
+ out:
+ free (sorted_syms);
+ sorted_syms = NULL;
+ if (old_xvec)
+ {
+ free ((void *) abfd->xvec);
+ abfd->xvec = old_xvec;
+ }
}
static bool
--
Alan Modra
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