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authorKees Cook <keescook@chromium.org>2018-06-12 14:27:11 -0700
committerKees Cook <keescook@chromium.org>2018-06-12 16:19:22 -0700
commit42bc47b35320e0e587a88e437e18f80f9c5bcbb2 (patch)
tree95c9f023d6f31176ea867c6bb13d85a1963c6d18 /drivers/scsi/fnic
parenta86854d0c599b3202307abceb68feee4d7061578 (diff)
downloadlinux-42bc47b35320e0e587a88e437e18f80f9c5bcbb2.tar.bz2
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.c7
-rw-r--r--drivers/scsi/fnic/fnic_trace.c15
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) {