Re: [PATCH v4 1/5] remoteproc: Use u64 len for da_to_va

From: Arnaud POULIQUEN
Date: Tue Feb 11 2020 - 10:53:58 EST

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In reply to: Clement Leger: "[PATCH v4 1/5] remoteproc: Use u64 len for da_to_va"
Next in thread: ClÃment Leger: "Re: [PATCH v4 1/5] remoteproc: Use u64 len for da_to_va"
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On 2/10/20 5:22 PM, Clement Leger wrote:
> With upcoming changes in elf loader for elf64 support, section size will
> be a u64. When used with da_to_va, this will potentially lead to
> overflow if using the current "int" type for len argument. Change
> da_to_va prototype to use a u64 for len and fix all users of this
> function.
>
> Signed-off-by: Clement Leger <cleger@xxxxxxxxx>
> ---
> drivers/remoteproc/imx_rproc.c | 11 ++++++-----
> drivers/remoteproc/keystone_remoteproc.c | 4 ++--
> drivers/remoteproc/qcom_q6v5_adsp.c | 2 +-
> drivers/remoteproc/qcom_q6v5_mss.c | 2 +-
> drivers/remoteproc/qcom_q6v5_pas.c | 2 +-
> drivers/remoteproc/qcom_q6v5_wcss.c | 2 +-
> drivers/remoteproc/qcom_wcnss.c | 2 +-
> drivers/remoteproc/remoteproc_core.c | 2 +-
> drivers/remoteproc/remoteproc_internal.h | 2 +-
> drivers/remoteproc/st_slim_rproc.c | 4 ++--
> drivers/remoteproc/wkup_m3_rproc.c | 4 ++--
> include/linux/remoteproc.h | 2 +-
> 12 files changed, 20 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index 3e72b6f38d4b..f497f5b49b18 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -186,7 +186,7 @@ static int imx_rproc_stop(struct rproc *rproc)
> }
>
> static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
> - int len, u64 *sys)
> + u64 len, u64 *sys)
> {
> const struct imx_rproc_dcfg *dcfg = priv->dcfg;
> int i;
> @@ -203,19 +203,19 @@ static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
> }
> }
>
> - dev_warn(priv->dev, "Translation failed: da = 0x%llx len = 0x%x\n",
> + dev_warn(priv->dev, "Translation failed: da = 0x%llx len = 0x%llx\n",
> da, len);
> return -ENOENT;
> }
>
> -static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct imx_rproc *priv = rproc->priv;
> void *va = NULL;
> u64 sys;
> int i;
>
> - if (len <= 0)
> + if (len == 0)
> return NULL;
>
> /*
> @@ -235,7 +235,8 @@ static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> }
> }
>
> - dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va);
> + dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%llx va = 0x%p\n",
> + da, len, va);
>
> return va;
> }
> diff --git a/drivers/remoteproc/keystone_remoteproc.c b/drivers/remoteproc/keystone_remoteproc.c
> index 5c4658f00b3d..466093f48814 100644
> --- a/drivers/remoteproc/keystone_remoteproc.c
> +++ b/drivers/remoteproc/keystone_remoteproc.c
> @@ -246,7 +246,7 @@ static void keystone_rproc_kick(struct rproc *rproc, int vqid)
> * can be used either by the remoteproc core for loading (when using kernel
> * remoteproc loader), or by any rpmsg bus drivers.
> */
> -static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct keystone_rproc *ksproc = rproc->priv;
> void __iomem *va = NULL;
> @@ -255,7 +255,7 @@ static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> size_t size;
> int i;
>
> - if (len <= 0)
> + if (len == 0)
> return NULL;
>
> for (i = 0; i < ksproc->num_mems; i++) {
> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
> index e953886b2eb7..7518e67a49e5 100644
> --- a/drivers/remoteproc/qcom_q6v5_adsp.c
> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c
> @@ -270,7 +270,7 @@ static int adsp_stop(struct rproc *rproc)
> return ret;
> }
>
> -static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *adsp_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
> int offset;
> diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
> index 471128a2e723..248febde6fc1 100644
> --- a/drivers/remoteproc/qcom_q6v5_mss.c
> +++ b/drivers/remoteproc/qcom_q6v5_mss.c
> @@ -1148,7 +1148,7 @@ static int q6v5_stop(struct rproc *rproc)
> return 0;
> }
>
> -static void *q6v5_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *q6v5_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct q6v5 *qproc = rproc->priv;
> int offset;
> diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
> index db4b3c4bacd7..cf2cd609c90d 100644
> --- a/drivers/remoteproc/qcom_q6v5_pas.c
> +++ b/drivers/remoteproc/qcom_q6v5_pas.c
> @@ -159,7 +159,7 @@ static int adsp_stop(struct rproc *rproc)
> return ret;
> }
>
> -static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *adsp_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
> int offset;
> diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
> index f93e1e4a1cc0..3a6b82a16961 100644
> --- a/drivers/remoteproc/qcom_q6v5_wcss.c
> +++ b/drivers/remoteproc/qcom_q6v5_wcss.c
> @@ -406,7 +406,7 @@ static int q6v5_wcss_stop(struct rproc *rproc)
> return 0;
> }
>
> -static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct q6v5_wcss *wcss = rproc->priv;
> int offset;
> diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
> index dc135754bb9c..f893219e45a8 100644
> --- a/drivers/remoteproc/qcom_wcnss.c
> +++ b/drivers/remoteproc/qcom_wcnss.c
> @@ -287,7 +287,7 @@ static int wcnss_stop(struct rproc *rproc)
> return ret;
> }
>
> -static void *wcnss_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *wcnss_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
> int offset;
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index 307df98347ba..9e6d3c6a60ee 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -185,7 +185,7 @@ EXPORT_SYMBOL(rproc_va_to_pa);
> * here the output of the DMA API for the carveouts, which should be more
> * correct.
> */
> -void *rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> +void *rproc_da_to_va(struct rproc *rproc, u64 da, u64 len)

This function is exported, don't see any update in consequence...
references:
https://elixir.bootlin.com/linux/v5.6-rc1/ident/rproc_da_to_va
For instance the function rproc_trace_read use it. it quite strange that my gcc does not warns for the cast but i suppose that some could.
An indirect consequence is that the len field in rproc_mem_entry struct should probably been updated to u64 to be aligned.

I'm still wondering about the use of size_t instead,which seems more rational from my window.
So i you or Mathieu remember it was decided to use u64, please could remind me the arguments?
As an alternative a check should be added for 32 bits processors to ensure that the size is not higher than
its address range capability...

Regards
Arnaud

> {
> struct rproc_mem_entry *carveout;
> void *ptr = NULL;
> diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
> index 493ef9262411..004867061721 100644
> --- a/drivers/remoteproc/remoteproc_internal.h
> +++ b/drivers/remoteproc/remoteproc_internal.h
> @@ -50,7 +50,7 @@ void rproc_exit_sysfs(void);
> void rproc_free_vring(struct rproc_vring *rvring);
> int rproc_alloc_vring(struct rproc_vdev *rvdev, int i);
>
> -void *rproc_da_to_va(struct rproc *rproc, u64 da, int len);
> +void *rproc_da_to_va(struct rproc *rproc, u64 da, u64 len);
> phys_addr_t rproc_va_to_pa(void *cpu_addr);
> int rproc_trigger_recovery(struct rproc *rproc);
>
> diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
> index 04492fead3c8..fc01cd879b60 100644
> --- a/drivers/remoteproc/st_slim_rproc.c
> +++ b/drivers/remoteproc/st_slim_rproc.c
> @@ -174,7 +174,7 @@ static int slim_rproc_stop(struct rproc *rproc)
> return 0;
> }
>
> -static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct st_slim_rproc *slim_rproc = rproc->priv;
> void *va = NULL;
> @@ -191,7 +191,7 @@ static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> }
> }
>
> - dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%pK\n",
> + dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%llx va = 0x%pK\n",
> da, len, va);
>
> return va;
> diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c
> index 3984e585c847..91485b467407 100644
> --- a/drivers/remoteproc/wkup_m3_rproc.c
> +++ b/drivers/remoteproc/wkup_m3_rproc.c
> @@ -80,14 +80,14 @@ static int wkup_m3_rproc_stop(struct rproc *rproc)
> return 0;
> }
>
> -static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> +static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, u64 len)
> {
> struct wkup_m3_rproc *wkupm3 = rproc->priv;
> void *va = NULL;
> int i;
> u32 offset;
>
> - if (len <= 0)
> + if (len == 0)
> return NULL;
>
> for (i = 0; i < WKUPM3_MEM_MAX; i++) {
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index 16ad66683ad0..f84bd5fe0211 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -374,7 +374,7 @@ struct rproc_ops {
> int (*start)(struct rproc *rproc);
> int (*stop)(struct rproc *rproc);
> void (*kick)(struct rproc *rproc, int vqid);
> - void * (*da_to_va)(struct rproc *rproc, u64 da, int len);
> + void * (*da_to_va)(struct rproc *rproc, u64 da, u64 len);
> int (*parse_fw)(struct rproc *rproc, const struct firmware *fw);
> int (*handle_rsc)(struct rproc *rproc, u32 rsc_type, void *rsc,
> int offset, int avail);
>

Next message: Andy Shevchenko: "Re: [PATCH v5 09/18] mfd: intel_soc_pmic: Add SCU IPC member to struct intel_soc_pmic"
Previous message: Mark Brown: "Applied "spi: add driver for ar934x spi controller" to the spi tree"
In reply to: Clement Leger: "[PATCH v4 1/5] remoteproc: Use u64 len for da_to_va"
Next in thread: ClÃment Leger: "Re: [PATCH v4 1/5] remoteproc: Use u64 len for da_to_va"
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