[PATCH] ext3/4: fix uninitialized bs in ext3/4_xattr_set_handle()

[Tiger Yang]

Hi,
I met a bug when I try to replace a xattr entry in ibody with a big size 
value. But in ibody there has no space for the new value. So it should 
set new xattr entry in block and remove the old xattr entry in ibody.

Best regards,
tiger
This fix the uninitialized bs when we try to replace a xattr entry in ibody with the new value which require more than free space.

Signed-off-by: Tiger Yang <tiger.yang@xxxxxxxxxx>

diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index a6ea4d6..e1af9bd 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -1000,6 +1000,11 @@ ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 			i.value = NULL;
 			error = ext3_xattr_block_set(handle, inode, &i, &bs);
 		} else if (error == -ENOSPC) {
+			if (EXT3_I(inode)->i_file_acl && !bs.s.base) {
+				error = ext3_xattr_block_find(inode, &i, &bs);
+				if (error)
+					goto cleanup;
+			}
 			error = ext3_xattr_block_set(handle, inode, &i, &bs);
 			if (error)
 				goto cleanup;
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index d796213..182a7a2 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1011,6 +1011,11 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 			i.value = NULL;
 			error = ext4_xattr_block_set(handle, inode, &i, &bs);
 		} else if (error == -ENOSPC) {
+			if (EXT4_I(inode)->i_file_acl && !bs.s.base) {
+				error = ext4_xattr_block_find(inode, &i, &bs);
+				if (error)
+					goto cleanup;
+			}
 			error = ext4_xattr_block_set(handle, inode, &i, &bs);
 			if (error)
 				goto cleanup;