From: "Gustavo A. R. Silva" <garsilva@embeddedor.com>
To: Peter Huewe <peterhuewe@gmx.de>,
Marcel Selhorst <tpmdd@selhorst.net>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <garsilva@embeddedor.com>
Subject: [PATCH] char: tmp: fix potential null pointer dereference
Date: Tue, 30 May 2017 16:51:23 -0500 [thread overview]
Message-ID: <20170530215123.GA7484@embeddedgus> (raw)
NULL check at line 147: if (chip) {, implies chip might be NULL.
Function dev_get_drvdata() dereference pointer chip.
Move pointer priv assignment inside the IF block that checks
pointer chip.
Addresses-Coverity-ID: 1397646
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
---
drivers/char/tpm/tpm_atmel.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index 0d322ab..0826efd 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -142,9 +142,10 @@ static struct platform_device *pdev;
static void atml_plat_remove(void)
{
struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
- struct tpm_atmel_priv *priv = dev_get_drvdata(&chip->dev);
+ struct tpm_atmel_priv *priv;
if (chip) {
+ priv = dev_get_drvdata(&chip->dev);
tpm_chip_unregister(chip);
if (priv->have_region)
atmel_release_region(priv->base, priv->region_size);
--
2.5.0
next reply other threads:[~2017-05-30 21:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-30 21:51 Gustavo A. R. Silva [this message]
2017-05-31 12:11 ` [PATCH] char: tmp: fix potential null pointer dereference Jarkko Sakkinen
[not found] ` <20170531121129.f3576lq7peott6gd-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-06-12 22:25 ` Gustavo A. R. Silva
2017-06-13 18:03 ` Jarkko Sakkinen
2017-06-13 19:55 ` [PATCH] char: tpm: remove unnecessary NULL check Gustavo A. R. Silva
2017-06-14 9:46 ` Jarkko Sakkinen
2017-06-19 0:35 ` Jarkko Sakkinen
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