diff options
| author | Pali Rohár <pali@kernel.org> | 2024-12-31 16:06:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-06 11:04:03 +0200 |
| commit | 5fae66b29ae530ed5a1dfaddb44a617e3d90fb2c (patch) | |
| tree | d06c192197257243333c999cdc9f9c55540130d5 /fs/smb/client/misc.c | |
| parent | a08118ae0e035d4778a8c7df8d6fb569c916e798 (diff) | |
cifs: Fix cifs_query_path_info() for Windows NT servers
[ Upstream commit a3e771afbb3bce91c8296828304903e7348003fe ]
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>
Diffstat (limited to 'fs/smb/client/misc.c')
| -rw-r--r-- | fs/smb/client/misc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/smb/client/misc.c b/fs/smb/client/misc.c index 7b6ed9b23e713..e77017f470845 100644 --- a/fs/smb/client/misc.c +++ b/fs/smb/client/misc.c @@ -326,6 +326,14 @@ check_smb_hdr(struct smb_hdr *smb) if (smb->Command == SMB_COM_LOCKING_ANDX) return 0; + /* + * Windows NT server returns error resposne (e.g. STATUS_DELETE_PENDING + * or STATUS_OBJECT_NAME_NOT_FOUND or ERRDOS/ERRbadfile or any other) + * for some TRANS2 requests without the RESPONSE flag set in header. + */ + if (smb->Command == SMB_COM_TRANSACTION2 && smb->Status.CifsError != 0) + return 0; + cifs_dbg(VFS, "Server sent request, not response. mid=%u\n", get_mid(smb)); return 1; |