cifs: Fix cifs_query_path_info() for Windows NT servers

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[ Upstream commit a3e771afbb ]

For TRANS2 QUERY_PATH_INFO request when the path does not exist, the
Windows NT SMB server returns error response STATUS_OBJECT_NAME_NOT_FOUND
or ERRDOS/ERRbadfile without the SMBFLG_RESPONSE flag set. Similarly it
returns STATUS_DELETE_PENDING when the file is being deleted. And looks
like that any error response from TRANS2 QUERY_PATH_INFO does not have
SMBFLG_RESPONSE flag set.

So relax check in check_smb_hdr() for detecting if the packet is response
for this special case.

This change fixes stat() operation against Windows NT SMB servers and also
all operations which depends on -ENOENT result from stat like creat() or
mkdir().

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Pali Rohár 2024-12-31 16:06:22 +01:00 • committed by Greg Kroah-Hartman

parent f80fdf48b8

commit ef4b3a7bf9

1 changed files with 8 additions and 0 deletions

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8

fs/smb/client/misc.c

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