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authorDuane Griffin <duaneg@dghda.com>2008-12-19 20:47:15 +0000
committerAl Viro <viro@zeniv.linux.org.uk>2008-12-31 18:07:39 -0500
commite83c1397cafc4e44f868289db5e417463c0d09a4 (patch)
tree1e5673897d0c7bcaad4a7e6927a7277e78525924
parentb5ed3112b5f74c8ec1c7aa03a76c596635e85197 (diff)
ext4: ensure fast symlinks are NUL-terminated
Ensure fast symlink targets are NUL-terminated, even if corrupted on-disk. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Theodore Ts'o <tytso@mit.edu> Cc: adilger@sun.com Cc: linux-ext4@vger.kernel.org Signed-off-by: Duane Griffin <duaneg@dghda.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/ext4/inode.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index be21a5ae33c..7c3325e0b00 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -34,6 +34,7 @@
#include <linux/writeback.h>
#include <linux/pagevec.h>
#include <linux/mpage.h>
+#include <linux/namei.h>
#include <linux/uio.h>
#include <linux/bio.h>
#include "ext4_jbd2.h"
@@ -4164,9 +4165,11 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
inode->i_op = &ext4_dir_inode_operations;
inode->i_fop = &ext4_dir_operations;
} else if (S_ISLNK(inode->i_mode)) {
- if (ext4_inode_is_fast_symlink(inode))
+ if (ext4_inode_is_fast_symlink(inode)) {
inode->i_op = &ext4_fast_symlink_inode_operations;
- else {
+ nd_terminate_link(ei->i_data, inode->i_size,
+ sizeof(ei->i_data) - 1);
+ } else {
inode->i_op = &ext4_symlink_inode_operations;
ext4_set_aops(inode);
}