From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Tue, 6 Oct 2020 19:21:36 +0000 (-0400)
Subject: maple_tree: Return false if _mas_walk is a ptr and mas->index != 0
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=7e74abb102c09054a92556d04f1105eb63b206e3;p=users%2Fjedix%2Flinux-maple.git

maple_tree: Return false if _mas_walk is a ptr and mas->index != 0

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index e3d2a10e330e..6b726bcc3a05 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -3715,8 +3715,11 @@ static inline bool _mas_walk(struct ma_state *mas, unsigned long *range_min,
 		return false;
 	}
 
-	if (mas_is_ptr(mas))
-		return true;
+	if (mas_is_ptr(mas)) {
+		if (!mas->index)
+			return true;
+		return false;
+	}
 
 	mas_set_offset(mas, 0);
 	return __mas_walk(mas, range_min, range_max);