diff options
author | Kees Cook <keescook@chromium.org> | 2018-06-12 13:55:00 -0700 |
---|---|---|
committer | Kees Cook <keescook@chromium.org> | 2018-06-12 16:19:22 -0700 |
commit | 6da2ec56059c3c7a7e5f729e6349e74ace1e5c57 (patch) | |
tree | 2278b513e904a46e930a856da3ed3ac5bc3fe4a4 /fs/cifs | |
parent | 1c542f38ab8d30d9c852a16d49ac5a15267bbf1f (diff) | |
download | op-kernel-dev-6da2ec56059c3c7a7e5f729e6349e74ace1e5c57.zip op-kernel-dev-6da2ec56059c3c7a7e5f729e6349e74ace1e5c57.tar.gz |
treewide: kmalloc() -> kmalloc_array()
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This
patch replaces cases of:
kmalloc(a * b, gfp)
with:
kmalloc_array(a * b, gfp)
as well as handling cases of:
kmalloc(a * b * c, gfp)
with:
kmalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kmalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kmalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The tools/ directory was manually excluded, since it has its own
implementation of kmalloc().
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kmalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kmalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kmalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kmalloc
+ kmalloc_array
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kmalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kmalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kmalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kmalloc(sizeof(THING) * C2, ...)
|
kmalloc(sizeof(TYPE) * C2, ...)
|
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(C1 * C2, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * E2
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'fs/cifs')
-rw-r--r-- | fs/cifs/asn1.c | 2 | ||||
-rw-r--r-- | fs/cifs/cifsacl.c | 4 | ||||
-rw-r--r-- | fs/cifs/inode.c | 2 | ||||
-rw-r--r-- | fs/cifs/smb2pdu.c | 6 | ||||
-rw-r--r-- | fs/cifs/transport.c | 8 |
5 files changed, 11 insertions, 11 deletions
diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c index a3b5654..3d19595 100644 --- a/fs/cifs/asn1.c +++ b/fs/cifs/asn1.c @@ -428,7 +428,7 @@ asn1_oid_decode(struct asn1_ctx *ctx, if (size < 2 || size > UINT_MAX/sizeof(unsigned long)) return 0; - *oid = kmalloc(size * sizeof(unsigned long), GFP_ATOMIC); + *oid = kmalloc_array(size, sizeof(unsigned long), GFP_ATOMIC); if (*oid == NULL) return 0; diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 13a8a77..1d377b7 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -747,8 +747,8 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, if (num_aces > ULONG_MAX / sizeof(struct cifs_ace *)) return; - ppace = kmalloc(num_aces * sizeof(struct cifs_ace *), - GFP_KERNEL); + ppace = kmalloc_array(num_aces, sizeof(struct cifs_ace *), + GFP_KERNEL); if (!ppace) return; diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 745fd7f..a94071c 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -1792,7 +1792,7 @@ cifs_rename2(struct inode *source_dir, struct dentry *source_dentry, * with unix extensions enabled. */ info_buf_source = - kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), + kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); if (info_buf_source == NULL) { rc = -ENOMEM; diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 48e2004..af032e1 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -3471,7 +3471,7 @@ send_set_info(const unsigned int xid, struct cifs_tcon *tcon, if (!num) return -EINVAL; - iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); + iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL); if (!iov) return -ENOMEM; @@ -3535,7 +3535,7 @@ SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, int rc; int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); - data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); + data = kmalloc_array(2, sizeof(void *), GFP_KERNEL); if (!data) return -ENOMEM; @@ -3583,7 +3583,7 @@ SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, int rc; int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); - data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); + data = kmalloc_array(2, sizeof(void *), GFP_KERNEL); if (!data) return -ENOMEM; diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 24887a0..1f1a68f 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -844,8 +844,8 @@ SendReceive2(const unsigned int xid, struct cifs_ses *ses, int rc; if (n_vec + 1 > CIFS_MAX_IOV_SIZE) { - new_iov = kmalloc(sizeof(struct kvec) * (n_vec + 1), - GFP_KERNEL); + new_iov = kmalloc_array(n_vec + 1, sizeof(struct kvec), + GFP_KERNEL); if (!new_iov) { /* otherwise cifs_send_recv below sets resp_buf_type */ *resp_buf_type = CIFS_NO_BUFFER; @@ -886,8 +886,8 @@ smb2_send_recv(const unsigned int xid, struct cifs_ses *ses, __be32 rfc1002_marker; if (n_vec + 1 > CIFS_MAX_IOV_SIZE) { - new_iov = kmalloc(sizeof(struct kvec) * (n_vec + 1), - GFP_KERNEL); + new_iov = kmalloc_array(n_vec + 1, sizeof(struct kvec), + GFP_KERNEL); if (!new_iov) return -ENOMEM; } else |