4.18-stable review patch. If anyone has any objections, please let me know.
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From: Jon Kuhn jkuhn@barracuda.com
[ Upstream commit c15e3f19a6d5c89b1209dc94b40e568177cb0921 ]
When a Mac client saves an item containing a backslash to a file server the backslash is represented in the CIFS/SMB protocol as as U+F026. Before this change, listing a directory containing an item with a backslash in its name will return that item with the backslash represented with a true backslash character (U+005C) because convert_sfm_character mapped U+F026 to U+005C when interpretting the CIFS/SMB protocol response. However, attempting to open or stat the path using a true backslash will result in an error because convert_to_sfm_char does not map U+005C back to U+F026 causing the CIFS/SMB request to be made with the backslash represented as U+005C.
This change simply prevents the U+F026 to U+005C conversion from happenning. This is analogous to how the code does not do any translation of UNI_SLASH (U+F000).
Signed-off-by: Jon Kuhn jkuhn@barracuda.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/cifs/cifs_unicode.c | 3 --- 1 file changed, 3 deletions(-)
--- a/fs/cifs/cifs_unicode.c +++ b/fs/cifs/cifs_unicode.c @@ -105,9 +105,6 @@ convert_sfm_char(const __u16 src_char, c case SFM_LESSTHAN: *target = '<'; break; - case SFM_SLASH: - *target = '\'; - break; case SFM_SPACE: *target = ' '; break;