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authorKees Cook <keescook@chromium.org>2018-06-12 14:04:32 -0700
committerKees Cook <keescook@chromium.org>2018-06-12 16:19:22 -0700
commit344476e16acbe20249675b75933be1ad52eff4df (patch)
treed080e81f89e1c198ac3655dad7bada20e984010a /drivers
parent590b5b7d8671e011d1a8e1ab20c60addb249d015 (diff)
treewide: kvmalloc() -> kvmalloc_array()
The kvmalloc() function has a 2-factor argument form, kvmalloc_array(). This patch replaces cases of: kvmalloc(a * b, gfp) with: kvmalloc_array(a * b, gfp) as well as handling cases of: kvmalloc(a * b * c, gfp) with: kvmalloc(array3_size(a, b, c), gfp) as it's slightly less ugly than: kvmalloc_array(array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: kvmalloc(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 Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kvmalloc( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kvmalloc( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kvmalloc( - sizeof(u8) * (COUNT) + COUNT , ...) | kvmalloc( - sizeof(__u8) * (COUNT) + COUNT , ...) | kvmalloc( - sizeof(char) * (COUNT) + COUNT , ...) | kvmalloc( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kvmalloc( - sizeof(u8) * COUNT + COUNT , ...) | kvmalloc( - sizeof(__u8) * COUNT + COUNT , ...) | kvmalloc( - sizeof(char) * COUNT + COUNT , ...) | kvmalloc( - 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; @@ ( - kvmalloc + kvmalloc_array ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kvmalloc + kvmalloc_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; @@ ( kvmalloc( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kvmalloc( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kvmalloc( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kvmalloc( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kvmalloc( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kvmalloc( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kvmalloc( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kvmalloc( - 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; @@ ( kvmalloc( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kvmalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kvmalloc( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kvmalloc( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kvmalloc( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kvmalloc( - 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; @@ ( kvmalloc( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kvmalloc( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kvmalloc( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kvmalloc( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kvmalloc( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kvmalloc( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kvmalloc( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kvmalloc( - 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; @@ ( kvmalloc(C1 * C2 * C3, ...) | kvmalloc( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kvmalloc( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kvmalloc( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kvmalloc( - 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; @@ ( kvmalloc(sizeof(THING) * C2, ...) | kvmalloc(sizeof(TYPE) * C2, ...) | kvmalloc(C1 * C2 * C3, ...) | kvmalloc(C1 * C2, ...) | - kvmalloc + kvmalloc_array ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kvmalloc + kvmalloc_array ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kvmalloc + kvmalloc_array ( - (E1) * E2 + E1, E2 , ...) | - kvmalloc + kvmalloc_array ( - (E1) * (E2) + E1, E2 , ...) | - kvmalloc + kvmalloc_array ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/apei/erst.c3
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/mmu/mem.c4
-rw-r--r--drivers/md/dm-integrity.c15
-rw-r--r--drivers/xen/evtchn.c2
4 files changed, 16 insertions, 8 deletions
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 9bff853e85f3..3c5ea7cb693e 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -524,7 +524,8 @@ retry:
pr_warn(FW_WARN "too many record IDs!\n");
return 0;
}
- new_entries = kvmalloc(new_size * sizeof(entries[0]), GFP_KERNEL);
+ new_entries = kvmalloc_array(new_size, sizeof(entries[0]),
+ GFP_KERNEL);
if (!new_entries)
return -ENOMEM;
memcpy(new_entries, entries,
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/mem.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/mem.c
index 39808489f21d..92e363dbbc5a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/mem.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/mem.c
@@ -191,9 +191,9 @@ nvkm_mem_new_host(struct nvkm_mmu *mmu, int type, u8 page, u64 size,
nvkm_memory_ctor(&nvkm_mem_dma, &mem->memory);
size = ALIGN(size, PAGE_SIZE) >> PAGE_SHIFT;
- if (!(mem->mem = kvmalloc(sizeof(*mem->mem) * size, GFP_KERNEL)))
+ if (!(mem->mem = kvmalloc_array(size, sizeof(*mem->mem), GFP_KERNEL)))
return -ENOMEM;
- if (!(mem->dma = kvmalloc(sizeof(*mem->dma) * size, GFP_KERNEL)))
+ if (!(mem->dma = kvmalloc_array(size, sizeof(*mem->dma), GFP_KERNEL)))
return -ENOMEM;
if (mmu->dma_bits > 32)
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 136e7e66d870..86438b2f10dd 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -2448,7 +2448,9 @@ static struct scatterlist **dm_integrity_alloc_journal_scatterlist(struct dm_int
struct scatterlist **sl;
unsigned i;
- sl = kvmalloc(ic->journal_sections * sizeof(struct scatterlist *), GFP_KERNEL | __GFP_ZERO);
+ sl = kvmalloc_array(ic->journal_sections,
+ sizeof(struct scatterlist *),
+ GFP_KERNEL | __GFP_ZERO);
if (!sl)
return NULL;
@@ -2464,7 +2466,8 @@ static struct scatterlist **dm_integrity_alloc_journal_scatterlist(struct dm_int
n_pages = (end_index - start_index + 1);
- s = kvmalloc(n_pages * sizeof(struct scatterlist), GFP_KERNEL);
+ s = kvmalloc_array(n_pages, sizeof(struct scatterlist),
+ GFP_KERNEL);
if (!s) {
dm_integrity_free_journal_scatterlist(ic, sl);
return NULL;
@@ -2643,7 +2646,9 @@ static int create_journal(struct dm_integrity_c *ic, char **error)
goto bad;
}
- sg = kvmalloc((ic->journal_pages + 1) * sizeof(struct scatterlist), GFP_KERNEL);
+ sg = kvmalloc_array(ic->journal_pages + 1,
+ sizeof(struct scatterlist),
+ GFP_KERNEL);
if (!sg) {
*error = "Unable to allocate sg list";
r = -ENOMEM;
@@ -2709,7 +2714,9 @@ static int create_journal(struct dm_integrity_c *ic, char **error)
r = -ENOMEM;
goto bad;
}
- ic->sk_requests = kvmalloc(ic->journal_sections * sizeof(struct skcipher_request *), GFP_KERNEL | __GFP_ZERO);
+ ic->sk_requests = kvmalloc_array(ic->journal_sections,
+ sizeof(struct skcipher_request *),
+ GFP_KERNEL | __GFP_ZERO);
if (!ic->sk_requests) {
*error = "Unable to allocate sk requests";
r = -ENOMEM;
diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index 8cac07ab60ab..6d1a5e58968f 100644
--- a/drivers/xen/evtchn.c
+++ b/drivers/xen/evtchn.c
@@ -322,7 +322,7 @@ static int evtchn_resize_ring(struct per_user_data *u)
else
new_size = 2 * u->ring_size;
- new_ring = kvmalloc(new_size * sizeof(*new_ring), GFP_KERNEL);
+ new_ring = kvmalloc_array(new_size, sizeof(*new_ring), GFP_KERNEL);
if (!new_ring)
return -ENOMEM;