[PATCH 4.19 093/118] cifs: Fix separator when building path from dentry

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4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paulo Alcantara <palcantara@xxxxxxxx>

commit c988de29ca161823db6a7125e803d597ef75b49c upstream.

Make sure to use the CIFS_DIR_SEP(cifs_sb) as path separator for
prefixpath too. Fixes a bug with smb1 UNIX extensions.

Fixes: a6b5058fafdf ("fs/cifs: make share unaccessible at root level mountable")
Signed-off-by: Paulo Alcantara <palcantara@xxxxxxxx>
Reviewed-by: Aurelien Aptel <aaptel@xxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
CC: Stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/cifs/dir.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -174,7 +174,7 @@ cifs_bp_rename_retry:
 
 		cifs_dbg(FYI, "using cifs_sb prepath <%s>\n", cifs_sb->prepath);
 		memcpy(full_path+dfsplen+1, cifs_sb->prepath, pplen-1);
-		full_path[dfsplen] = '\\';
+		full_path[dfsplen] = dirsep;
 		for (i = 0; i < pplen-1; i++)
 			if (full_path[dfsplen+1+i] == '/')
 				full_path[dfsplen+1+i] = CIFS_DIR_SEP(cifs_sb);





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