[PATCH 01/12] cifs: Fix struct FILE_ALL_INFO

Pali Rohár
2024-12-31T22:37:09Z

struct FILE_ALL_INFO for level 263 (0x107) used by QPathInfo does not have
any IndexNumber, AccessFlags, IndexNumber1, CurrentByteOffset, Mode or
AlignmentRequirement members. So remove all of them.

Also adjust code in move_cifs_info_to_smb2() function which convers struct
FILE_ALL_INFO to struct smb2_file_all_info.

Fixed content of struct FILE_ALL_INFO was verified that is correct against:
* [MS-CIFS] section 2.2.8.3.10 SMB_QUERY_FILE_ALL_INFO
* Samba server implementation of trans2 query file/path for level 263
* Packet structure tests against Windows SMB servers

This change fixes CIFSSMBQFileInfo() and CIFSSMBQPathInfo() functions which
directly copy received FILE_ALL_INFO network buffers into kernel structures
of FILE_ALL_INFO type.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
fs/smb/client/cifsglob.h | 12 +++++++-----
fs/smb/client/cifspdu.h | 6 ------
2 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h
index 1338b3473ef3..82e819f9d24e 100644
--- a/fs/smb/client/cifsglob.h
+++ b/fs/smb/client/cifsglob.h
@@ -2216,11 +2216,13 @@ static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)

static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src)
{
- memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src));
- dst->AccessFlags = src->AccessFlags;
- dst->CurrentByteOffset = src->CurrentByteOffset;
- dst->Mode = src->Mode;
- dst->AlignmentRequirement = src->AlignmentRequirement;
+ memcpy(dst, src, (size_t)((u8 *)&src->EASize - (u8 *)src));
+ dst->IndexNumber = 0;
+ dst->EASize = src->EASize;
+ dst->AccessFlags = 0;
+ dst->CurrentByteOffset = 0;
+ dst->Mode = 0;
+ dst->AlignmentRequirement = 0;
dst->FileNameLength = src->FileNameLength;
}

diff --git a/fs/smb/client/cifspdu.h b/fs/smb/client/cifspdu.h
index 3ad1bb79ea9e..e5e397291da9 100644
--- a/fs/smb/client/cifspdu.h
+++ b/fs/smb/client/cifspdu.h
@@ -2294,13 +2294,7 @@ typedef struct { /* data block encoding of response to level 263 QPathInfo */
__u8 DeletePending;
__u8 Directory;
__u16 Pad2;
- __le64 IndexNumber;
__le32 EASize;
- __le32 AccessFlags;
- __u64 IndexNumber1;
- __le64 CurrentByteOffset;
- __le32 Mode;
- __le32 AlignmentRequirement;
__le32 FileNameLength;
union {
char __pad;
--
2.20.1