Messages in this thread Patch in this message | | | Date | Fri, 7 Jul 2017 02:05:36 -0500 | From | "Gustavo A. R. Silva" <> | Subject | [PATCH] nvmem: imx-ocotp: add NULL check on of_match_device() return value |
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Check return value from call to of_match_device() in order to prevent a NULL pointer dereference.
In case of NULL print error message and return -ENODEV
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> --- drivers/nvmem/imx-ocotp.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c index 193ca8f..caa18cd 100644 --- a/drivers/nvmem/imx-ocotp.c +++ b/drivers/nvmem/imx-ocotp.c @@ -342,6 +342,11 @@ static int imx_ocotp_probe(struct platform_device *pdev) return PTR_ERR(priv->clk); of_id = of_match_device(imx_ocotp_dt_ids, dev); + if (!of_id) { + dev_err(dev, "failed to match device\n"); + return -ENODEV; + } + priv->nregs = (unsigned long)of_id->data; imx_ocotp_nvmem_config.size = 4 * priv->nregs; imx_ocotp_nvmem_config.dev = dev; -- 2.5.0
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