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

• Lines: 51
• Date: Wed May 24 18:38:26 2000
• Orig file: v2.3.99-pre9/linux/arch/mips/kernel/signal.c
• Orig date: Tue May 23 15:31:33 2000

diff -u --recursive --new-file v2.3.99-pre9/linux/arch/mips/kernel/signal.c linux/arch/mips/kernel/signal.c
@@ -37,6 +37,41 @@
 extern asmlinkage int save_fp_context(struct sigcontext *sc);
 extern asmlinkage int restore_fp_context(struct sigcontext *sc);
 
+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);
+		/* First 32bits of unions are always present.  */
+		err |= __put_user(from->si_pid, &to->si_pid);
+		switch (from->si_code >> 16) {
+		case __SI_FAULT >> 16:
+			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);
+			break;
+		/* case __SI_RT: This is not generated by the kernel as of now.  */
+		}
+		return err;
+	}
+}
+
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
  */
@@ -438,7 +473,7 @@
 	}
 
 	/* Create siginfo.  */
-	err |= __copy_to_user(&frame->rs_info, info, sizeof(*info));
+	err |= copy_siginfo_to_user(&frame->rs_info, info);
 
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->rs_uc.uc_flags);