patch-2.4.0-test1 linux/arch/ia64/kernel/signal.c

• Lines: 53
• Date: Wed May 24 18:38:26 2000
• Orig file: v2.3.99-pre9/linux/arch/ia64/kernel/signal.c
• Orig date: Wed Apr 26 16:34:06 2000

diff -u --recursive --new-file v2.3.99-pre9/linux/arch/ia64/kernel/signal.c linux/arch/ia64/kernel/signal.c
@@ -138,6 +138,43 @@
 	return err;
 }
 
+int copy_siginfo_to_user(siginfo_t *to, siginfo_t *from)
+{
+	if (!access_ok (VERIFY_WRITE, to, sizeof(siginfo_t)))
+		return -EFAULT;
+	if (from->si_code < 0)
+		return __copy_to_user(to, from, sizeof(siginfo_t));
+	else {
+		int err;
+
+		/* If you change siginfo_t structure, please be sure
+		   this code is fixed accordingly.
+		   It should never copy any pad contained in the structure
+		   to avoid security leaks, but must copy the generic
+		   3 ints plus the relevant union member.  */
+		err = __put_user(from->si_signo, &to->si_signo);
+		err |= __put_user(from->si_errno, &to->si_errno);
+		err |= __put_user((short)from->si_code, &to->si_code);
+		switch (from->si_code >> 16) {
+		case __SI_FAULT >> 16:
+		case __SI_POLL >> 16:
+			err |= __put_user(from->si_addr, &to->si_addr);
+			err |= __put_user(from->si_imm, &to->si_imm);
+			break;
+		case __SI_CHLD >> 16:
+			err |= __put_user(from->si_utime, &to->si_utime);
+			err |= __put_user(from->si_stime, &to->si_stime);
+			err |= __put_user(from->si_status, &to->si_status);
+		default:
+			err |= __put_user(from->si_uid, &to->si_uid);
+			err |= __put_user(from->si_pid, &to->si_pid);
+			break;
+		/* case __SI_RT: This is not generated by the kernel as of now.  */
+		}
+		return err;
+	}
+}
+
 /*
  * When we get here, ((struct switch_stack *) pt - 1) is a
  * switch_stack frame that has no defined value.  Upon return, we
@@ -290,7 +327,7 @@
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		goto give_sigsegv;
 
-	err  = __copy_to_user(&frame->info, info, sizeof(siginfo_t));
+	err  = copy_siginfo_to_user(&frame->info, info);
 
 	err |= __put_user(current->sas_ss_sp, &frame->sc.sc_stack.ss_sp);
 	err |= __put_user(current->sas_ss_size, &frame->sc.sc_stack.ss_size);