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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH v2 5/7] mtd: nand-mxs: fix out-of-bounds write on 64-bit SoCs
Date: Wed,  7 Oct 2020 11:50:56 +0200	[thread overview]
Message-ID: <20201007095058.22950-5-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20201007095058.22950-1-a.fatoum@pengutronix.de>

Probing the nand_mxs device driver on 64 bit systems invokes
undefined behavior, because of an errant cast. Fix this.

No change of behavior for 32-bit SoCs intended. On error,
type == 0 == GPMI_MXS as it used to.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 drivers/mtd/nand/nand_mxs.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/nand_mxs.c b/drivers/mtd/nand/nand_mxs.c
index 36b6e7ac224e..e2b6e2162076 100644
--- a/drivers/mtd/nand/nand_mxs.c
+++ b/drivers/mtd/nand/nand_mxs.c
@@ -2145,9 +2145,7 @@ static int mxs_nand_probe(struct device_d *dev)
 	if (mxs_nand_mtd)
 		return -EBUSY;
 
-	err = dev_get_drvdata(dev, (const void **)&type);
-	if (err)
-		type = GPMI_MXS;
+	type = (enum gpmi_type)device_get_match_data(dev);
 
 	nand_info = kzalloc(sizeof(struct mxs_nand_info), GFP_KERNEL);
 	if (!nand_info) {
-- 
2.28.0


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  parent reply	other threads:[~2020-10-07  9:51 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-07  9:50 [PATCH v2 1/7] driver: introduce less error-prone dev_get_drvdata alternative Ahmad Fatoum
2020-10-07  9:50 ` [PATCH v2 2/7] led: pca955x: fix probing from device tree Ahmad Fatoum
2020-10-07  9:50 ` [PATCH v2 3/7] dma: apbh: fix out-of-bounds write on 64-bit SoCs Ahmad Fatoum
2020-10-07  9:50 ` [PATCH v2 4/7] aiodev: lm75: " Ahmad Fatoum
2020-10-07  9:50 ` Ahmad Fatoum [this message]
2020-10-07  9:50 ` [PATCH v2 6/7] video: imx-hdmi: fix dev_get_drvdata misuse Ahmad Fatoum
2020-10-07  9:50 ` [PATCH v2 7/7] driver: migrate some from dev_get_drvdata to device_get_match_data Ahmad Fatoum
2020-10-09  6:48 ` [PATCH v2 1/7] driver: introduce less error-prone dev_get_drvdata alternative Sascha Hauer

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