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-rw-r--r--fs/ext4/xattr.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 0ae3668520f8..93a00d89a220 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -820,8 +820,14 @@ inserted:
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
goal = goal & EXT4_MAX_BLOCK_FILE_PHYS;
+ /*
+ * take i_data_sem because we will test
+ * i_delalloc_reserved_flag in ext4_mb_new_blocks
+ */
+ down_read((&EXT4_I(inode)->i_data_sem));
block = ext4_new_meta_blocks(handle, inode, goal, 0,
NULL, &error);
+ up_read((&EXT4_I(inode)->i_data_sem));
if (error)
goto cleanup;