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udf: Fix lost writes in udf_adinicb_writepage()

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The patch converting udf_adinicb_writepage() to avoid manually kmapping
the page used memcpy_to_page() however that copies in the wrong
direction (effectively overwriting file data with the old contents).
What we should be using is memcpy_from_page() to copy data from the page
into the inode and then mark inode dirty to store the data.

Fixes: 5cfc45321a ("udf: Convert udf_adinicb_writepage() to memcpy_to_page()")
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara
2023-02-27 19:32:19 +01:00
parent fe15c26ee2
commit 49854d3ccc
1 changed files with 1 additions and 1 deletions
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fs/udf/inode.c
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@@ -193,7 +193,7 @@ static int udf_adinicb_writepage(struct folio *folio,
struct udf_inode_info *iinfo = UDF_I(inode); struct udf_inode_info *iinfo = UDF_I(inode);
BUG_ON(!PageLocked(page)); BUG_ON(!PageLocked(page));
memcpy_to_page(page, 0, iinfo->i_data + iinfo->i_lenEAttr, memcpy_from_page(iinfo->i_data + iinfo->i_lenEAttr, page, 0,
i_size_read(inode)); i_size_read(inode));
unlock_page(page); unlock_page(page);
mark_inode_dirty(inode); mark_inode_dirty(inode);