diff options
author | Kees Cook <keescook@chromium.org> | 2018-06-13 00:27:11 +0300 |
---|---|---|
committer | Kees Cook <keescook@chromium.org> | 2018-06-13 02:19:22 +0300 |
commit | 42bc47b35320e0e587a88e437e18f80f9c5bcbb2 (patch) | |
tree | 95c9f023d6f31176ea867c6bb13d85a1963c6d18 /drivers/scsi/fnic | |
parent | a86854d0c599b3202307abceb68feee4d7061578 (diff) | |
download | linux-42bc47b35320e0e587a88e437e18f80f9c5bcbb2.tar.xz |
treewide: Use array_size() in vmalloc()
The vmalloc() function has no 2-factor argument form, so multiplication
factors need to be wrapped in array_size(). This patch replaces cases of:
vmalloc(a * b)
with:
vmalloc(array_size(a, b))
as well as handling cases of:
vmalloc(a * b * c)
with:
vmalloc(array3_size(a, b, c))
This does, however, attempt to ignore constant size factors like:
vmalloc(4 * 1024)
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 Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
vmalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
vmalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
vmalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
vmalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
vmalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
vmalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
vmalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
vmalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
vmalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
vmalloc(
- 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;
@@
(
vmalloc(
- sizeof(TYPE) * (COUNT_ID)
+ array_size(COUNT_ID, sizeof(TYPE))
, ...)
|
vmalloc(
- sizeof(TYPE) * COUNT_ID
+ array_size(COUNT_ID, sizeof(TYPE))
, ...)
|
vmalloc(
- sizeof(TYPE) * (COUNT_CONST)
+ array_size(COUNT_CONST, sizeof(TYPE))
, ...)
|
vmalloc(
- sizeof(TYPE) * COUNT_CONST
+ array_size(COUNT_CONST, sizeof(TYPE))
, ...)
|
vmalloc(
- sizeof(THING) * (COUNT_ID)
+ array_size(COUNT_ID, sizeof(THING))
, ...)
|
vmalloc(
- sizeof(THING) * COUNT_ID
+ array_size(COUNT_ID, sizeof(THING))
, ...)
|
vmalloc(
- sizeof(THING) * (COUNT_CONST)
+ array_size(COUNT_CONST, sizeof(THING))
, ...)
|
vmalloc(
- sizeof(THING) * COUNT_CONST
+ array_size(COUNT_CONST, sizeof(THING))
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
vmalloc(
- SIZE * COUNT
+ array_size(COUNT, SIZE)
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
vmalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
vmalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
vmalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
vmalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
vmalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
vmalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
vmalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
vmalloc(
- 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;
@@
(
vmalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
vmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
vmalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
vmalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
vmalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
vmalloc(
- 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;
@@
(
vmalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
vmalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
vmalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
vmalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
vmalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
vmalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
vmalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
vmalloc(
- 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;
@@
(
vmalloc(C1 * C2 * C3, ...)
|
vmalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants.
@@
expression E1, E2;
constant C1, C2;
@@
(
vmalloc(C1 * C2, ...)
|
vmalloc(
- E1 * E2
+ array_size(E1, E2)
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/scsi/fnic')
-rw-r--r-- | drivers/scsi/fnic/fnic_debugfs.c | 7 | ||||
-rw-r--r-- | drivers/scsi/fnic/fnic_trace.c | 15 |
2 files changed, 13 insertions, 9 deletions
diff --git a/drivers/scsi/fnic/fnic_debugfs.c b/drivers/scsi/fnic/fnic_debugfs.c index 6d3e1cb4fea6..139fffa3658a 100644 --- a/drivers/scsi/fnic/fnic_debugfs.c +++ b/drivers/scsi/fnic/fnic_debugfs.c @@ -233,8 +233,8 @@ static int fnic_trace_debugfs_open(struct inode *inode, return -ENOMEM; if (*rdata_ptr == fc_trc_flag->fnic_trace) { - fnic_dbg_prt->buffer = vmalloc(3 * - (trace_max_pages * PAGE_SIZE)); + fnic_dbg_prt->buffer = vmalloc(array3_size(3, trace_max_pages, + PAGE_SIZE)); if (!fnic_dbg_prt->buffer) { kfree(fnic_dbg_prt); return -ENOMEM; @@ -244,7 +244,8 @@ static int fnic_trace_debugfs_open(struct inode *inode, fnic_dbg_prt->buffer_len = fnic_get_trace_data(fnic_dbg_prt); } else { fnic_dbg_prt->buffer = - vmalloc(3 * (fnic_fc_trace_max_pages * PAGE_SIZE)); + vmalloc(array3_size(3, fnic_fc_trace_max_pages, + PAGE_SIZE)); if (!fnic_dbg_prt->buffer) { kfree(fnic_dbg_prt); return -ENOMEM; diff --git a/drivers/scsi/fnic/fnic_trace.c b/drivers/scsi/fnic/fnic_trace.c index 98597b59c12a..8271785bdb93 100644 --- a/drivers/scsi/fnic/fnic_trace.c +++ b/drivers/scsi/fnic/fnic_trace.c @@ -477,8 +477,9 @@ int fnic_trace_buf_init(void) } memset((void *)fnic_trace_buf_p, 0, (trace_max_pages * PAGE_SIZE)); - fnic_trace_entries.page_offset = vmalloc(fnic_max_trace_entries * - sizeof(unsigned long)); + fnic_trace_entries.page_offset = + vmalloc(array_size(fnic_max_trace_entries, + sizeof(unsigned long))); if (!fnic_trace_entries.page_offset) { printk(KERN_ERR PFX "Failed to allocate memory for" " page_offset\n"); @@ -555,8 +556,9 @@ int fnic_fc_trace_init(void) fc_trace_max_entries = (fnic_fc_trace_max_pages * PAGE_SIZE)/ FC_TRC_SIZE_BYTES; - fnic_fc_ctlr_trace_buf_p = (unsigned long)vmalloc( - fnic_fc_trace_max_pages * PAGE_SIZE); + fnic_fc_ctlr_trace_buf_p = + (unsigned long)vmalloc(array_size(PAGE_SIZE, + fnic_fc_trace_max_pages)); if (!fnic_fc_ctlr_trace_buf_p) { pr_err("fnic: Failed to allocate memory for " "FC Control Trace Buf\n"); @@ -568,8 +570,9 @@ int fnic_fc_trace_init(void) fnic_fc_trace_max_pages * PAGE_SIZE); /* Allocate memory for page offset */ - fc_trace_entries.page_offset = vmalloc(fc_trace_max_entries * - sizeof(unsigned long)); + fc_trace_entries.page_offset = + vmalloc(array_size(fc_trace_max_entries, + sizeof(unsigned long))); if (!fc_trace_entries.page_offset) { pr_err("fnic:Failed to allocate memory for page_offset\n"); if (fnic_fc_ctlr_trace_buf_p) { |