[PATCH v2 00/24] use vmalloc_array and vcalloc

[PATCH v2 00/24] use vmalloc_array and vcalloc

[Julia Lawall]

The functions vmalloc_array and vcalloc were introduced in

commit a8749a35c399 ("mm: vmalloc: introduce array allocation functions")

but are not used much yet.  This series introduces uses of
these functions, to protect against multiplication overflows.

The changes were done using the following Coccinelle semantic
patch.

@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)
)

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

---

 arch/x86/kernel/cpu/sgx/main.c                    |    2 +-
 drivers/accel/habanalabs/common/device.c          |    3 ++-
 drivers/accel/habanalabs/common/state_dump.c      |    7 ++++---
 drivers/bus/mhi/host/init.c                       |    2 +-
 drivers/comedi/comedi_buf.c                       |    4 ++--
 drivers/dma-buf/heaps/system_heap.c               |    2 +-
 drivers/gpu/drm/gud/gud_pipe.c                    |    2 +-
 drivers/gpu/drm/i915/gvt/gtt.c                    |    6 ++++--
 drivers/infiniband/hw/bnxt_re/qplib_res.c         |    4 ++--
 drivers/infiniband/hw/erdma/erdma_verbs.c         |    4 ++--
 drivers/infiniband/sw/siw/siw_qp.c                |    4 ++--
 drivers/infiniband/sw/siw/siw_verbs.c             |    6 +++---
 drivers/iommu/tegra-gart.c                        |    4 ++--
 drivers/net/ethernet/amd/pds_core/core.c          |    4 ++--
 drivers/net/ethernet/freescale/enetc/enetc.c      |    4 ++--
 drivers/net/ethernet/google/gve/gve_tx.c          |    2 +-
 drivers/net/ethernet/marvell/octeon_ep/octep_rx.c |    2 +-
 drivers/net/ethernet/microsoft/mana/hw_channel.c  |    2 +-
 drivers/net/ethernet/pensando/ionic/ionic_lif.c   |    4 ++--
 drivers/scsi/fnic/fnic_trace.c                    |    2 +-
 drivers/scsi/qla2xxx/qla_init.c                   |    4 ++--
 drivers/vdpa/vdpa_user/iova_domain.c              |    4 ++--
 drivers/virtio/virtio_mem.c                       |    6 +++---
 fs/btrfs/zoned.c                                  |    4 ++--
 kernel/kcov.c                                     |    2 +-
 lib/test_vmalloc.c                                |    9 +++++----
 26 files changed, 52 insertions(+), 47 deletions(-)

[PATCH v2 13/24] iommu/tegra: gart: use vmalloc_array and vcalloc

[Julia Lawall]

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/iommu/tegra-gart.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff -u -p a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -348,8 +348,8 @@ struct gart_device *tegra_gart_probe(str
 	if (err)
 		goto remove_sysfs;
 
-	gart->savedata = vmalloc(resource_size(res) / GART_PAGE_SIZE *
-				 sizeof(u32));
+	gart->savedata = vmalloc_array(resource_size(res) / GART_PAGE_SIZE,
+				       sizeof(u32));
 	if (!gart->savedata) {
 		err = -ENOMEM;
 		goto unregister_iommu;

Re: [PATCH v2 00/24] use vmalloc_array and vcalloc

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Tue, 27 Jun 2023 16:43:15 +0200 you wrote:
> The functions vmalloc_array and vcalloc were introduced in
> 
> commit a8749a35c399 ("mm: vmalloc: introduce array allocation functions")
> 
> but are not used much yet.  This series introduces uses of
> these functions, to protect against multiplication overflows.
> 
> [...]

Here is the summary with links:
  - [v2,02/24] octeon_ep: use vmalloc_array and vcalloc
    https://git.kernel.org/netdev/net-next/c/32d462a5c3e5
  - [v2,04/24] gve: use vmalloc_array and vcalloc
    https://git.kernel.org/netdev/net-next/c/a13de901e8d5
  - [v2,09/24] pds_core: use vmalloc_array and vcalloc
    https://git.kernel.org/netdev/net-next/c/906a76cc7645
  - [v2,11/24] ionic: use vmalloc_array and vcalloc
    https://git.kernel.org/netdev/net-next/c/f712c8297e0a
  - [v2,18/24] net: enetc: use vmalloc_array and vcalloc
    https://git.kernel.org/netdev/net-next/c/fa87c54693ae
  - [v2,22/24] net: mana: use vmalloc_array and vcalloc
    https://git.kernel.org/netdev/net-next/c/e9c74f8b8a31

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Re: [PATCH v2 00/24] use vmalloc_array and vcalloc

[Martin K. Petersen]

Julia,

> The functions vmalloc_array and vcalloc were introduced in
>
> commit a8749a35c399 ("mm: vmalloc: introduce array allocation functions")
>
> but are not used much yet.  This series introduces uses of
> these functions, to protect against multiplication overflows.

Applied #7 and #24 to 6.5/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

Re: (subset) [PATCH v2 00/24] use vmalloc_array and vcalloc

[Martin K. Petersen]

On Tue, 27 Jun 2023 16:43:15 +0200, Julia Lawall wrote:

> The functions vmalloc_array and vcalloc were introduced in
> 
> commit a8749a35c399 ("mm: vmalloc: introduce array allocation functions")
> 
> but are not used much yet.  This series introduces uses of
> these functions, to protect against multiplication overflows.
> 
> [...]

Applied to 6.5/scsi-fixes, thanks!

[07/24] scsi: fnic: use vmalloc_array and vcalloc
        https://git.kernel.org/mkp/scsi/c/b34c7dcaf311
[24/24] scsi: qla2xxx: use vmalloc_array and vcalloc
        https://git.kernel.org/mkp/scsi/c/04d91b783acf

-- 
Martin K. Petersen	Oracle Linux Engineering