JFFS2: Return an error for long filenames

Return an error if a name is too long for JFFS2 rather than
corrupting data.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 8bc7a5018e4044be500c3e14bf73b974673c6646..f92840a3a52fdb6c11d1f569bc753658fd97af07 100644 (file)
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -78,6 +78,9 @@ static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
 
        D1(printk(KERN_DEBUG "jffs2_lookup()\n"));
 
+       if (target->d_name.len > JFFS2_MAX_NAME_LEN)
+               return ERR_PTR(-ENAMETOOLONG);
+
        dir_f = JFFS2_INODE_INFO(dir_i);
        c = JFFS2_SB_INFO(dir_i->i_sb);