* [PATCH][next] smb: client: Fix struct_group() usage in __packed structs
@ 2024-04-24 2:41 Gustavo A. R. Silva
2024-04-24 4:36 ` Namjae Jeon
0 siblings, 1 reply; 2+ messages in thread
From: Gustavo A. R. Silva @ 2024-04-24 2:41 UTC (permalink / raw)
To: Steve French, Paulo Alcantara, Ronnie Sahlberg, Shyam Prasad N,
Tom Talpey, Bharath SM, Namjae Jeon, Dmitry Antipov
Cc: linux-cifs, samba-technical, linux-kernel, Gustavo A. R. Silva,
linux-hardening
Use struct_group_attr() in __packed structs, instead of struct_group().
Below you can see the pahole output before/after changes:
pahole -C smb2_file_network_open_info fs/smb/client/smb2ops.o
struct smb2_file_network_open_info {
union {
struct {
__le64 CreationTime; /* 0 8 */
__le64 LastAccessTime; /* 8 8 */
__le64 LastWriteTime; /* 16 8 */
__le64 ChangeTime; /* 24 8 */
__le64 AllocationSize; /* 32 8 */
__le64 EndOfFile; /* 40 8 */
__le32 Attributes; /* 48 4 */
}; /* 0 56 */
struct {
__le64 CreationTime; /* 0 8 */
__le64 LastAccessTime; /* 8 8 */
__le64 LastWriteTime; /* 16 8 */
__le64 ChangeTime; /* 24 8 */
__le64 AllocationSize; /* 32 8 */
__le64 EndOfFile; /* 40 8 */
__le32 Attributes; /* 48 4 */
} network_open_info; /* 0 56 */
}; /* 0 56 */
__le32 Reserved; /* 56 4 */
/* size: 60, cachelines: 1, members: 2 */
/* last cacheline: 60 bytes */
} __attribute__((__packed__));
pahole -C smb2_file_network_open_info fs/smb/client/smb2ops.o
struct smb2_file_network_open_info {
union {
struct {
__le64 CreationTime; /* 0 8 */
__le64 LastAccessTime; /* 8 8 */
__le64 LastWriteTime; /* 16 8 */
__le64 ChangeTime; /* 24 8 */
__le64 AllocationSize; /* 32 8 */
__le64 EndOfFile; /* 40 8 */
__le32 Attributes; /* 48 4 */
} __attribute__((__packed__)); /* 0 52 */
struct {
__le64 CreationTime; /* 0 8 */
__le64 LastAccessTime; /* 8 8 */
__le64 LastWriteTime; /* 16 8 */
__le64 ChangeTime; /* 24 8 */
__le64 AllocationSize; /* 32 8 */
__le64 EndOfFile; /* 40 8 */
__le32 Attributes; /* 48 4 */
} __attribute__((__packed__)) network_open_info; /* 0 52 */
}; /* 0 52 */
__le32 Reserved; /* 52 4 */
/* size: 56, cachelines: 1, members: 2 */
/* last cacheline: 56 bytes */
};
pahole -C smb_com_open_rsp fs/smb/client/cifssmb.o
struct smb_com_open_rsp {
...
union {
struct {
__le64 CreationTime; /* 48 8 */
__le64 LastAccessTime; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
__le64 LastWriteTime; /* 64 8 */
__le64 ChangeTime; /* 72 8 */
__le32 FileAttributes; /* 80 4 */
}; /* 48 40 */
struct {
__le64 CreationTime; /* 48 8 */
__le64 LastAccessTime; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
__le64 LastWriteTime; /* 64 8 */
__le64 ChangeTime; /* 72 8 */
__le32 FileAttributes; /* 80 4 */
} common_attributes; /* 48 40 */
}; /* 48 40 */
...
/* size: 111, cachelines: 2, members: 14 */
/* last cacheline: 47 bytes */
} __attribute__((__packed__));
pahole -C smb_com_open_rsp fs/smb/client/cifssmb.o
struct smb_com_open_rsp {
...
union {
struct {
__le64 CreationTime; /* 48 8 */
__le64 LastAccessTime; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
__le64 LastWriteTime; /* 64 8 */
__le64 ChangeTime; /* 72 8 */
__le32 FileAttributes; /* 80 4 */
} __attribute__((__packed__)); /* 48 36 */
struct {
__le64 CreationTime; /* 48 8 */
__le64 LastAccessTime; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
__le64 LastWriteTime; /* 64 8 */
__le64 ChangeTime; /* 72 8 */
__le32 FileAttributes; /* 80 4 */
} __attribute__((__packed__)) common_attributes; /* 48 36 */
}; /* 48 36 */
...
/* size: 107, cachelines: 2, members: 14 */
/* last cacheline: 43 bytes */
} __attribute__((__packed__));
pahole -C FILE_ALL_INFO fs/smb/client/cifssmb.o
typedef struct {
union {
struct {
__le64 CreationTime; /* 0 8 */
__le64 LastAccessTime; /* 8 8 */
__le64 LastWriteTime; /* 16 8 */
__le64 ChangeTime; /* 24 8 */
__le32 Attributes; /* 32 4 */
}; /* 0 40 */
struct {
__le64 CreationTime; /* 0 8 */
__le64 LastAccessTime; /* 8 8 */
__le64 LastWriteTime; /* 16 8 */
__le64 ChangeTime; /* 24 8 */
__le32 Attributes; /* 32 4 */
} common_attributes; /* 0 40 */
}; /* 0 40 */
...
/* size: 113, cachelines: 2, members: 17 */
/* last cacheline: 49 bytes */
} __attribute__((__packed__)) FILE_ALL_INFO;
pahole -C FILE_ALL_INFO fs/smb/client/cifssmb.o
typedef struct {
union {
struct {
__le64 CreationTime; /* 0 8 */
__le64 LastAccessTime; /* 8 8 */
__le64 LastWriteTime; /* 16 8 */
__le64 ChangeTime; /* 24 8 */
__le32 Attributes; /* 32 4 */
} __attribute__((__packed__)); /* 0 36 */
struct {
__le64 CreationTime; /* 0 8 */
__le64 LastAccessTime; /* 8 8 */
__le64 LastWriteTime; /* 16 8 */
__le64 ChangeTime; /* 24 8 */
__le32 Attributes; /* 32 4 */
} __attribute__((__packed__)) common_attributes; /* 0 36 */
}; /* 0 36 */
...
/* size: 109, cachelines: 2, members: 17 */
/* last cacheline: 45 bytes */
} __attribute__((__packed__)) FILE_ALL_INFO;
Fixes: 0015eb6e1238 ("smb: client, common: fix fortify warnings")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
fs/smb/client/cifspdu.h | 4 ++--
fs/smb/client/smb2pdu.h | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/smb/client/cifspdu.h b/fs/smb/client/cifspdu.h
index c0513fbb8a59..c46d418c1c0c 100644
--- a/fs/smb/client/cifspdu.h
+++ b/fs/smb/client/cifspdu.h
@@ -882,7 +882,7 @@ typedef struct smb_com_open_rsp {
__u8 OplockLevel;
__u16 Fid;
__le32 CreateAction;
- struct_group(common_attributes,
+ struct_group_attr(common_attributes, __packed,
__le64 CreationTime;
__le64 LastAccessTime;
__le64 LastWriteTime;
@@ -2266,7 +2266,7 @@ typedef struct {
/* QueryFileInfo/QueryPathinfo (also for SetPath/SetFile) data buffer formats */
/******************************************************************************/
typedef struct { /* data block encoding of response to level 263 QPathInfo */
- struct_group(common_attributes,
+ struct_group_attr(common_attributes, __packed,
__le64 CreationTime;
__le64 LastAccessTime;
__le64 LastWriteTime;
diff --git a/fs/smb/client/smb2pdu.h b/fs/smb/client/smb2pdu.h
index c72a3b2886b7..2fccf0d4f53d 100644
--- a/fs/smb/client/smb2pdu.h
+++ b/fs/smb/client/smb2pdu.h
@@ -320,7 +320,7 @@ struct smb2_file_reparse_point_info {
} __packed;
struct smb2_file_network_open_info {
- struct_group(network_open_info,
+ struct_group_attr(network_open_info, __packed,
__le64 CreationTime;
__le64 LastAccessTime;
__le64 LastWriteTime;
--
2.34.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH][next] smb: client: Fix struct_group() usage in __packed structs
2024-04-24 2:41 [PATCH][next] smb: client: Fix struct_group() usage in __packed structs Gustavo A. R. Silva
@ 2024-04-24 4:36 ` Namjae Jeon
0 siblings, 0 replies; 2+ messages in thread
From: Namjae Jeon @ 2024-04-24 4:36 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Steve French, Paulo Alcantara, Ronnie Sahlberg, Shyam Prasad N,
Tom Talpey, Bharath SM, Dmitry Antipov, linux-cifs,
samba-technical, linux-kernel, linux-hardening
2024년 4월 24일 (수) 오전 11:41, Gustavo A. R. Silva <gustavoars@kernel.org>님이 작성:
>
> Use struct_group_attr() in __packed structs, instead of struct_group().
>
> Below you can see the pahole output before/after changes:
>
> pahole -C smb2_file_network_open_info fs/smb/client/smb2ops.o
> struct smb2_file_network_open_info {
> union {
> struct {
> __le64 CreationTime; /* 0 8 */
> __le64 LastAccessTime; /* 8 8 */
> __le64 LastWriteTime; /* 16 8 */
> __le64 ChangeTime; /* 24 8 */
> __le64 AllocationSize; /* 32 8 */
> __le64 EndOfFile; /* 40 8 */
> __le32 Attributes; /* 48 4 */
> }; /* 0 56 */
> struct {
> __le64 CreationTime; /* 0 8 */
> __le64 LastAccessTime; /* 8 8 */
> __le64 LastWriteTime; /* 16 8 */
> __le64 ChangeTime; /* 24 8 */
> __le64 AllocationSize; /* 32 8 */
> __le64 EndOfFile; /* 40 8 */
> __le32 Attributes; /* 48 4 */
> } network_open_info; /* 0 56 */
> }; /* 0 56 */
> __le32 Reserved; /* 56 4 */
>
> /* size: 60, cachelines: 1, members: 2 */
> /* last cacheline: 60 bytes */
> } __attribute__((__packed__));
>
> pahole -C smb2_file_network_open_info fs/smb/client/smb2ops.o
> struct smb2_file_network_open_info {
> union {
> struct {
> __le64 CreationTime; /* 0 8 */
> __le64 LastAccessTime; /* 8 8 */
> __le64 LastWriteTime; /* 16 8 */
> __le64 ChangeTime; /* 24 8 */
> __le64 AllocationSize; /* 32 8 */
> __le64 EndOfFile; /* 40 8 */
> __le32 Attributes; /* 48 4 */
> } __attribute__((__packed__)); /* 0 52 */
> struct {
> __le64 CreationTime; /* 0 8 */
> __le64 LastAccessTime; /* 8 8 */
> __le64 LastWriteTime; /* 16 8 */
> __le64 ChangeTime; /* 24 8 */
> __le64 AllocationSize; /* 32 8 */
> __le64 EndOfFile; /* 40 8 */
> __le32 Attributes; /* 48 4 */
> } __attribute__((__packed__)) network_open_info; /* 0 52 */
> }; /* 0 52 */
> __le32 Reserved; /* 52 4 */
>
> /* size: 56, cachelines: 1, members: 2 */
> /* last cacheline: 56 bytes */
> };
>
> pahole -C smb_com_open_rsp fs/smb/client/cifssmb.o
> struct smb_com_open_rsp {
> ...
>
> union {
> struct {
> __le64 CreationTime; /* 48 8 */
> __le64 LastAccessTime; /* 56 8 */
> /* --- cacheline 1 boundary (64 bytes) --- */
> __le64 LastWriteTime; /* 64 8 */
> __le64 ChangeTime; /* 72 8 */
> __le32 FileAttributes; /* 80 4 */
> }; /* 48 40 */
> struct {
> __le64 CreationTime; /* 48 8 */
> __le64 LastAccessTime; /* 56 8 */
> /* --- cacheline 1 boundary (64 bytes) --- */
> __le64 LastWriteTime; /* 64 8 */
> __le64 ChangeTime; /* 72 8 */
> __le32 FileAttributes; /* 80 4 */
> } common_attributes; /* 48 40 */
> }; /* 48 40 */
>
> ...
>
> /* size: 111, cachelines: 2, members: 14 */
> /* last cacheline: 47 bytes */
> } __attribute__((__packed__));
>
> pahole -C smb_com_open_rsp fs/smb/client/cifssmb.o
> struct smb_com_open_rsp {
> ...
>
> union {
> struct {
> __le64 CreationTime; /* 48 8 */
> __le64 LastAccessTime; /* 56 8 */
> /* --- cacheline 1 boundary (64 bytes) --- */
> __le64 LastWriteTime; /* 64 8 */
> __le64 ChangeTime; /* 72 8 */
> __le32 FileAttributes; /* 80 4 */
> } __attribute__((__packed__)); /* 48 36 */
> struct {
> __le64 CreationTime; /* 48 8 */
> __le64 LastAccessTime; /* 56 8 */
> /* --- cacheline 1 boundary (64 bytes) --- */
> __le64 LastWriteTime; /* 64 8 */
> __le64 ChangeTime; /* 72 8 */
> __le32 FileAttributes; /* 80 4 */
> } __attribute__((__packed__)) common_attributes; /* 48 36 */
> }; /* 48 36 */
>
> ...
>
> /* size: 107, cachelines: 2, members: 14 */
> /* last cacheline: 43 bytes */
> } __attribute__((__packed__));
>
> pahole -C FILE_ALL_INFO fs/smb/client/cifssmb.o
> typedef struct {
> union {
> struct {
> __le64 CreationTime; /* 0 8 */
> __le64 LastAccessTime; /* 8 8 */
> __le64 LastWriteTime; /* 16 8 */
> __le64 ChangeTime; /* 24 8 */
> __le32 Attributes; /* 32 4 */
> }; /* 0 40 */
> struct {
> __le64 CreationTime; /* 0 8 */
> __le64 LastAccessTime; /* 8 8 */
> __le64 LastWriteTime; /* 16 8 */
> __le64 ChangeTime; /* 24 8 */
> __le32 Attributes; /* 32 4 */
> } common_attributes; /* 0 40 */
> }; /* 0 40 */
>
> ...
>
> /* size: 113, cachelines: 2, members: 17 */
> /* last cacheline: 49 bytes */
> } __attribute__((__packed__)) FILE_ALL_INFO;
>
> pahole -C FILE_ALL_INFO fs/smb/client/cifssmb.o
> typedef struct {
> union {
> struct {
> __le64 CreationTime; /* 0 8 */
> __le64 LastAccessTime; /* 8 8 */
> __le64 LastWriteTime; /* 16 8 */
> __le64 ChangeTime; /* 24 8 */
> __le32 Attributes; /* 32 4 */
> } __attribute__((__packed__)); /* 0 36 */
> struct {
> __le64 CreationTime; /* 0 8 */
> __le64 LastAccessTime; /* 8 8 */
> __le64 LastWriteTime; /* 16 8 */
> __le64 ChangeTime; /* 24 8 */
> __le32 Attributes; /* 32 4 */
> } __attribute__((__packed__)) common_attributes; /* 0 36 */
> }; /* 0 36 */
>
> ...
>
> /* size: 109, cachelines: 2, members: 17 */
> /* last
cacheline: 45 bytes */
> } __attribute__((__packed__)) FILE_ALL_INFO;
>
> Fixes: 0015eb6e1238 ("smb: client, common: fix fortify warnings")
> Cc: stable@vger.kernel.org
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Looks good to me:)
Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
Thanks!
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