ext4: check for zero length extent

[firefly-linux-kernel-4.4.55.git] / fs / ext4 / extents.c

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 74f23c292e1b3000bb7bd9cf0e953df27488b698..4394a757aa4cfbcbc13c644192c9cdfba5f09c17 100644 (file)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -300,6 +300,8 @@ static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext)
        ext4_fsblk_t block = ext4_ext_pblock(ext);
        int len = ext4_ext_get_actual_len(ext);
 
+       if (len == 0)
+               return 0;
        return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, len);
 }