sysv: ensure fast symlinks are NUL-terminated
Ensure fast symlink targets are NUL-terminated, even if corrupted
on-disk.
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Duane Griffin <duaneg@dghda.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index df0d435..3d81bf5 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -27,6 +27,7 @@
#include <linux/init.h>
#include <linux/buffer_head.h>
#include <linux/vfs.h>
+#include <linux/namei.h>
#include <asm/byteorder.h>
#include "sysv.h"
@@ -163,8 +164,11 @@
if (inode->i_blocks) {
inode->i_op = &sysv_symlink_inode_operations;
inode->i_mapping->a_ops = &sysv_aops;
- } else
+ } else {
inode->i_op = &sysv_fast_symlink_inode_operations;
+ nd_terminate_link(SYSV_I(inode)->i_data, inode->i_size,
+ sizeof(SYSV_I(inode)->i_data) - 1);
+ }
} else
init_special_inode(inode, inode->i_mode, rdev);
}