linux/drivers/gpu/drm/gud
Julia Lawall b0fb8b6908 drm/gud: use vmalloc_array and vcalloc
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>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230627144339.144478-4-Julia.Lawall@inria.fr
2023-07-04 12:05:08 +02:00
..
gud_connector.c drm/connector: Rename drm_mode_create_tv_properties 2022-11-24 12:42:39 +01:00
gud_drv.c drm/gud: use new debugfs device-centered functions 2023-01-06 16:15:08 -03:00
gud_internal.h drm/gud: Use the shadow plane helper 2022-12-06 16:38:05 +01:00
gud_pipe.c drm/gud: use vmalloc_array and vcalloc 2023-07-04 12:05:08 +02:00
Kconfig drm/shmem-helper: Switch to vmf_insert_pfn 2021-08-12 21:41:10 +02:00
Makefile