patch-2.4.21 linux-2.4.21/fs/locks.c

• Lines: 21
• Date: 2003-06-13 07:51:37.000000000 -0700
• Orig file: linux-2.4.20/fs/locks.c
• Orig date: 2002-11-28 15:53:15.000000000 -0800

diff -urN linux-2.4.20/fs/locks.c linux-2.4.21/fs/locks.c
@@ -274,9 +274,18 @@
 		return -EINVAL;
 	}
 
-	if (((start += l->l_start) < 0) || (l->l_len < 0))
+	/* POSIX-1996 leaves the case l->l_len < 0 undefined;
+	   POSIX-2001 defines it. */
+	start += l->l_start;
+	if (l->l_len < 0) {
+		end = start - 1;
+		start += l->l_len;
+	} else {
+		end = start + l->l_len - 1;
+	}
+
+	if (start < 0)
 		return -EINVAL;
-	end = start + l->l_len - 1;
 	if (l->l_len > 0 && end < 0)
 		return -EOVERFLOW;
 	fl->fl_start = start;	/* we record the absolute position */