ext4: avoid clearing beyond i_blocks when truncating an inline data file

[deliverable/linux.git] / fs / ext4 / inline.c

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index c417e52d194ee0342492ada5dc64736f508bc40d..ed29e720e880ed99fd03b015d63df1d88020f5bf 100644 (file)
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1928,9 +1928,11 @@ void ext4_inline_data_truncate(struct inode *inode, int *has_inline)
                }
 
                /* Clear the content within i_blocks. */
-               if (i_size < EXT4_MIN_INLINE_DATA_SIZE)
-                       memset(ext4_raw_inode(&is.iloc)->i_block + i_size, 0,
-                                       EXT4_MIN_INLINE_DATA_SIZE - i_size);
+               if (i_size < EXT4_MIN_INLINE_DATA_SIZE) {
+                       void *p = (void *) ext4_raw_inode(&is.iloc)->i_block;
+                       memset(p + i_size, 0,
+                              EXT4_MIN_INLINE_DATA_SIZE - i_size);
+               }
 
                EXT4_I(inode)->i_inline_size = i_size <
                                        EXT4_MIN_INLINE_DATA_SIZE ?