[PATCH] fix core-dump return code

While looking at the signal.c coredumping BUG_ON race, I noticed a bug
(not directly related) in do_coredump.  It was setting the "core dumped"
flag even when the format dumping hook failed (e.g.  for memory
allocation failures).
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/exec.c

@@ -1411,7 +1411,8 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
 
 	retval = binfmt->core_dump(signr, regs, file);
 
-	current->signal->group_exit_code |= 0x80;
+	if (retval)
+		current->signal->group_exit_code |= 0x80;
 close_fail:
 	filp_close(file, NULL);
 fail_unlock: