diff mbox series

[v2,05/24] RDMA/erdma: use vmalloc_array and vcalloc

Message ID 20230627144339.144478-6-Julia.Lawall@inria.fr
State New
Headers
Series use vmalloc_array and vcalloc |

Commit Message

Julia Lawall June 27, 2023, 2:43 p.m. UTC 
  Use vmalloc_array and vcalloc to protect against
multiplication overflows.

The changes were done using the following Coccinelle
semantic patch:

// <smpl>
@initialize:ocaml@
@@

let rename alloc =
  match alloc with
    "vmalloc" -> "vmalloc_array"
  | "vzalloc" -> "vcalloc"
  | _ -> failwith "unknown"

@@
    size_t e1,e2;
    constant C1, C2;
    expression E1, E2, COUNT, x1, x2, x3;
    typedef u8;
    typedef __u8;
    type t = {u8,__u8,char,unsigned char};
    identifier alloc = {vmalloc,vzalloc};
    fresh identifier realloc = script:ocaml(alloc) { rename alloc };
@@

(
      alloc(x1*x2*x3)
|
      alloc(C1 * C2)
|
      alloc((sizeof(t)) * (COUNT), ...)
|
-     alloc((e1) * (e2))
+     realloc(e1, e2)
|
-     alloc((e1) * (COUNT))
+     realloc(COUNT, e1)
|
-     alloc((E1) * (E2))
+     realloc(E1, E2)
)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

---
v2: Use vmalloc_array and vcalloc instead of array_size.
This also leaves a multiplication of a constant by a sizeof
as is.  Two patches are thus dropped from the series.

 drivers/infiniband/hw/erdma/erdma_verbs.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Jason Gunthorpe July 21, 2023, 6:56 p.m. UTC | #1 
On Tue, Jun 27, 2023 at 04:43:20PM +0200, Julia Lawall wrote:
> Use vmalloc_array and vcalloc to protect against
> multiplication overflows.
> 
> The changes were done using the following Coccinelle
> semantic patch:
> 
> // <smpl>
> @initialize:ocaml@
> @@
> 
> let rename alloc =
>   match alloc with
>     "vmalloc" -> "vmalloc_array"
>   | "vzalloc" -> "vcalloc"
>   | _ -> failwith "unknown"
> 
> @@
>     size_t e1,e2;
>     constant C1, C2;
>     expression E1, E2, COUNT, x1, x2, x3;
>     typedef u8;
>     typedef __u8;
>     type t = {u8,__u8,char,unsigned char};
>     identifier alloc = {vmalloc,vzalloc};
>     fresh identifier realloc = script:ocaml(alloc) { rename alloc };
> @@
> 
> (
>       alloc(x1*x2*x3)
> |
>       alloc(C1 * C2)
> |
>       alloc((sizeof(t)) * (COUNT), ...)
> |
> -     alloc((e1) * (e2))
> +     realloc(e1, e2)
> |
> -     alloc((e1) * (COUNT))
> +     realloc(COUNT, e1)
> |
> -     alloc((E1) * (E2))
> +     realloc(E1, E2)
> )
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
> ---
> v2: Use vmalloc_array and vcalloc instead of array_size.
> This also leaves a multiplication of a constant by a sizeof
> as is.  Two patches are thus dropped from the series.
> 
>  drivers/infiniband/hw/erdma/erdma_verbs.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied to rdma for-next along with

[v2,19/24] RDMA/bnxt_re: use vmalloc_array and vcalloc
[v2,14/24] RDMA/siw: use vmalloc_array and vcalloc
[v2,05/24] RDMA/erdma: use vmalloc_array and vcalloc

Thanks,
Jason
diff mbox series

Patch

diff -u -p a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c
--- a/drivers/infiniband/hw/erdma/erdma_verbs.c
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.c
@@ -481,8 +481,8 @@  static int init_kernel_qp(struct erdma_d
 		dev->func_bar + (ERDMA_SDB_SHARED_PAGE_INDEX << PAGE_SHIFT);
 	kqp->hw_rq_db = dev->func_bar + ERDMA_BAR_RQDB_SPACE_OFFSET;
 
-	kqp->swr_tbl = vmalloc(qp->attrs.sq_size * sizeof(u64));
-	kqp->rwr_tbl = vmalloc(qp->attrs.rq_size * sizeof(u64));
+	kqp->swr_tbl = vmalloc_array(qp->attrs.sq_size, sizeof(u64));
+	kqp->rwr_tbl = vmalloc_array(qp->attrs.rq_size, sizeof(u64));
 	if (!kqp->swr_tbl || !kqp->rwr_tbl)
 		goto err_out;