From 1e03e38b35b8e72d65fd5d931627bd6ff02926c1 Mon Sep 17 00:00:00 2001
From: Jason Hrycay <jhrycay@gmail.com>
Date: Fri, 31 May 2013 12:45:11 -0500
Subject: [PATCH] f2fs: handle errors from get_node_page calls
Add check for error pointers returned from get_node_page in order to
avoid dereferencing a bad address on the next use.
Signed-off-by: Jason Hrycay <jason.hrycay@motorola.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
---
fs/f2fs/xattr.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 0b02dce313565..ae61f359554fd 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -218,6 +218,8 @@ int f2fs_getxattr(struct inode *inode, int name_index, const char *name,
return -ENODATA;
page = get_node_page(sbi, fi->i_xattr_nid);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
base_addr = page_address(page);
list_for_each_xattr(entry, base_addr) {
@@ -268,6 +270,8 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
return 0;
page = get_node_page(sbi, fi->i_xattr_nid);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
base_addr = page_address(page);
list_for_each_xattr(entry, base_addr) {
--
2.30.2