Re: [PATCH] crypto: brcm: add NULL check on of_match_device() return value

[Herbert Xu]

On Fri, Jul 07, 2017 at 01:33:33AM -0500, Gustavo A. R. Silva wrote:
> 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 

Patch applied.  Thanks.
-- 
Email: Herbert Xu 
Home Page: http://gondor.apana.org.au/~herbert/
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[PATCH] crypto: brcm: add NULL check on of_match_device() return value

[Gustavo A. R. Silva]

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 
---
 drivers/crypto/bcm/cipher.c | 5 +
 1 file changed, 5 insertions(+)

diff --git a/drivers/crypto/bcm/cipher.c b/drivers/crypto/bcm/cipher.c
index 9cfd36c..f1a826f 100644
--- a/drivers/crypto/bcm/cipher.c
+++ b/drivers/crypto/bcm/cipher.c
@@ -4813,6 +4813,11 @@ static int spu_dt_read(struct platform_device *pdev)
int err;
 
match = of_match_device(of_match_ptr(bcm_spu_dt_ids), dev);
+   if (!match) {
+   dev_err(&pdev->dev, "Failed to match device\n");
+   return -ENODEV;
+   }
+
matched_spu_type = match->data;
 
if (iproc_priv.spu.num_spu > 1) {
-- 
2.5.0