fs/ntfs3: Add check in ntfs_extend_initialized_size

Check arguments again after lock.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index f704ceef953948f5aca75c7fd187c15b91d1007f..0063e2351aa9fc3104e9e8885e12cb76df6b9590 100644 (file)
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -182,13 +182,15 @@ static int ntfs_extend_initialized_size(struct file *file,
        loff_t pos = valid;
        int err;
 
+       if (valid >= new_valid)
+               return 0;
+
        if (is_resident(ni)) {
                ni->i_valid = new_valid;
                return 0;
        }
 
        WARN_ON(is_compressed(ni));
-       WARN_ON(valid >= new_valid);
 
        for (;;) {
                u32 zerofrom, len;