| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
-Wflex-array-member-not-at-end is coming in GCC-14, and we are getting
ready to enable it globally.
So, in order to avoid ending up with a flexible-array member in the
middle of multiple other structs, we use the `__struct_group()` helper
to separate the flexible array from the rest of the members in the
flexible structure, and use the tagged `struct create_context_hdr`
instead of `struct create_context`.
So, with these changes, fix 51 of the following warnings[1]:
fs/smb/client/../common/smb2pdu.h:1225:31: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
Link: https://gist.github.com/GustavoARSilva/772526a39be3dd4db39e71497f0a9893 [1]
Link: https://github.com/KSPP/linux/issues/202
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
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
Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Add a new command to smb2_compound_op() for querying WSL extended
attributes from reparse points.
Signed-off-by: Paulo Alcantara <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Add support for creating special files via WSL reparse points when
using 'reparse=wsl' mount option. They're faster than NFS reparse
points because they don't require extra roundtrips to figure out what
->d_type a specific dirent is as such information is already stored in
query dir responses and then making getdents() calls faster.
Signed-off-by: Paulo Alcantara <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
When compiling with gcc version 14.0.0 20231126 (experimental)
and CONFIG_FORTIFY_SOURCE=y, I've noticed the following:
In file included from ./include/linux/string.h:295,
from ./include/linux/bitmap.h:12,
from ./include/linux/cpumask.h:12,
from ./arch/x86/include/asm/paravirt.h:17,
from ./arch/x86/include/asm/cpuid.h:62,
from ./arch/x86/include/asm/processor.h:19,
from ./arch/x86/include/asm/cpufeature.h:5,
from ./arch/x86/include/asm/thread_info.h:53,
from ./include/linux/thread_info.h:60,
from ./arch/x86/include/asm/preempt.h:9,
from ./include/linux/preempt.h:79,
from ./include/linux/spinlock.h:56,
from ./include/linux/wait.h:9,
from ./include/linux/wait_bit.h:8,
from ./include/linux/fs.h:6,
from fs/smb/client/smb2pdu.c:18:
In function 'fortify_memcpy_chk',
inlined from '__SMB2_close' at fs/smb/client/smb2pdu.c:3480:4:
./include/linux/fortify-string.h:588:25: warning: call to '__read_overflow2_field'
declared with attribute warning: detected read beyond size of field (2nd parameter);
maybe use struct_group()? [-Wattribute-warning]
588 | __read_overflow2_field(q_size_field, size);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
and:
In file included from ./include/linux/string.h:295,
from ./include/linux/bitmap.h:12,
from ./include/linux/cpumask.h:12,
from ./arch/x86/include/asm/paravirt.h:17,
from ./arch/x86/include/asm/cpuid.h:62,
from ./arch/x86/include/asm/processor.h:19,
from ./arch/x86/include/asm/cpufeature.h:5,
from ./arch/x86/include/asm/thread_info.h:53,
from ./include/linux/thread_info.h:60,
from ./arch/x86/include/asm/preempt.h:9,
from ./include/linux/preempt.h:79,
from ./include/linux/spinlock.h:56,
from ./include/linux/wait.h:9,
from ./include/linux/wait_bit.h:8,
from ./include/linux/fs.h:6,
from fs/smb/client/cifssmb.c:17:
In function 'fortify_memcpy_chk',
inlined from 'CIFS_open' at fs/smb/client/cifssmb.c:1248:3:
./include/linux/fortify-string.h:588:25: warning: call to '__read_overflow2_field'
declared with attribute warning: detected read beyond size of field (2nd parameter);
maybe use struct_group()? [-Wattribute-warning]
588 | __read_overflow2_field(q_size_field, size);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In both cases, the fortification logic inteprets calls to 'memcpy()' as an
attempts to copy an amount of data which exceeds the size of the specified
field (i.e. more than 8 bytes from __le64 value) and thus issues an overread
warning. Both of these warnings may be silenced by using the convenient
'struct_group()' quirk.
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Move CIFS/SMB3 related client and server files (cifs.ko and ksmbd.ko
and helper modules) to new fs/smb subdirectory:
fs/cifs --> fs/smb/client
fs/ksmbd --> fs/smb/server
fs/smbfs_common --> fs/smb/common
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
