mbox series

[v2,00/24] use vmalloc_array and vcalloc

Message ID 20230627144339.144478-1-Julia.Lawall@inria.fr
Headers show
Series use vmalloc_array and vcalloc | expand

Message

Julia Lawall June 27, 2023, 2:43 p.m. UTC 
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(-)

Comments

Martin K. Petersen July 6, 2023, 1:35 a.m. UTC | #1 
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!