udf: Fix error paths in udf_new_inode()

I case we failed to allocate memory for inode when creating it, we did not
properly free block already allocated for this inode. Move memory allocation
before the block allocation which fixes this issue (thanks for the idea go to
Ingo Oeser <ioe-lkml@rameria.de>). Also remove a few superfluous
initializations already done in udf_alloc_inode().

Reviewed-by: Ingo Oeser <ioe-lkml@rameria.de>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index c4943c8988c271337f142f9648d1ff03455b717b..a4f2b3ce45b053ca76168a01d93b38974d34a949 100644 (file)
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -76,11 +76,24 @@ struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
        *err = -ENOSPC;
 
        iinfo = UDF_I(inode);
-       iinfo->i_unique = 0;
-       iinfo->i_lenExtents = 0;
-       iinfo->i_next_alloc_block = 0;
-       iinfo->i_next_alloc_goal = 0;
-       iinfo->i_strat4096 = 0;
+       if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
+               iinfo->i_efe = 1;
+               if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
+                       sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
+               iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
+                                           sizeof(struct extendedFileEntry),
+                                           GFP_KERNEL);
+       } else {
+               iinfo->i_efe = 0;
+               iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
+                                           sizeof(struct fileEntry),
+                                           GFP_KERNEL);
+       }
+       if (!iinfo->i_ext.i_data) {
+               iput(inode);
+               *err = -ENOMEM;
+               return NULL;
+       }
 
        block = udf_new_block(dir->i_sb, NULL,
                              dinfo->i_location.partitionReferenceNum,
@@ -130,24 +143,6 @@ struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
        iinfo->i_lenEAttr = 0;
        iinfo->i_lenAlloc = 0;
        iinfo->i_use = 0;
-       if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
-               iinfo->i_efe = 1;
-               if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
-                       sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
-               iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
-                                           sizeof(struct extendedFileEntry),
-                                           GFP_KERNEL);
-       } else {
-               iinfo->i_efe = 0;
-               iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
-                                           sizeof(struct fileEntry),
-                                           GFP_KERNEL);
-       }
-       if (!iinfo->i_ext.i_data) {
-               iput(inode);
-               *err = -ENOMEM;
-               return NULL;
-       }
        if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
                iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
        else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))