From: Andre Noll <maan@systemlinux.org>
Date: Sun, 18 Nov 2007 19:49:56 +0000 (+0100)
Subject: Add additional sanity checks to osl_get_rank().
X-Git-Tag: v0.3.0~113^2~4
X-Git-Url: http://git.tue.mpg.de/?a=commitdiff_plain;h=c47aa3e188e0e51b4dfdf957a140177bfc03a8da;p=paraslash.git

Add additional sanity checks to osl_get_rank().

Check whether the riven rank is greater than zero and not greater than
the number of rows in the table.
---

diff --git a/osl.c b/osl.c
index 5c806419..9843a020 100644
--- a/osl.c
+++ b/osl.c
@@ -2013,8 +2013,17 @@ int osl_get_nth_row(const struct osl_table *t, unsigned col_num,
 {
 	struct osl_column *col;
 	struct rb_node *node;
-	int ret = check_rbtree_col(t, col_num, &col);
+	unsigned num_rows;
+	int ret;
 
+	if (n == 0)
+		return -E_RB_KEY_NOT_FOUND;
+	ret = osl_get_num_rows(t, &num_rows);
+	if (ret < 0)
+		return ret;
+	if (n > num_rows)
+		return -E_RB_KEY_NOT_FOUND;
+	ret = check_rbtree_col(t, col_num, &col);
 	if (ret < 0)
 		return ret;
 	node = rb_nth(col->rbtree.rb_node, n);