From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 3/7] dma: apbh: fix out-of-bounds write on 64-bit SoCs
Date: Mon, 28 Sep 2020 17:42:43 +0200 [thread overview]
Message-ID: <20200928154247.15619-3-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20200928154247.15619-1-a.fatoum@pengutronix.de>
i.MX8 MM & MN are both ARM64 SoCs with a device compatible
with "fsl,imx28-dma-apbh". Probing the barebox device driver on these
SoCs would invoke undefined behavior however, because of an
errant cast. Fix this.
This has a side-effect: Whereas before, probing devices matched by
driver name failed with -ENODEV, they are now considered to be
compatible to IMX23_DMA instead. As we don't depend on this, this
is deemed acceptable.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
drivers/dma/apbh_dma.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/dma/apbh_dma.c b/drivers/dma/apbh_dma.c
index 3bee89f78b85..186c69388c7f 100644
--- a/drivers/dma/apbh_dma.c
+++ b/drivers/dma/apbh_dma.c
@@ -596,9 +596,7 @@ static int apbh_dma_probe(struct device_d *dev)
enum mxs_dma_id id;
int ret, channel;
- ret = dev_get_drvdata(dev, (const void **)&id);
- if (ret)
- return ret;
+ id = (enum mxs_dma_id)device_get_match_data(dev);
apbh_dma = apbh = xzalloc(sizeof(*apbh));
iores = dev_request_mem_resource(dev, 0);
--
2.28.0
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next prev parent reply other threads:[~2020-09-28 15:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-28 15:42 [PATCH 1/7] driver: introduce less error-prone dev_get_drvdata alternative Ahmad Fatoum
2020-09-28 15:42 ` [PATCH 2/7] led: pca955x: fix probing from device tree Ahmad Fatoum
2020-09-29 7:19 ` Sascha Hauer
2020-09-30 7:28 ` Ahmad Fatoum
2020-09-28 15:42 ` Ahmad Fatoum [this message]
2020-09-28 15:42 ` [PATCH 4/7] aiodev: lm75: fix out-of-bounds write on 64-bit SoCs Ahmad Fatoum
2020-09-28 15:42 ` [PATCH 5/7] mtd: nand-mxs: " Ahmad Fatoum
2020-09-28 16:01 ` Marco Felsch
2020-09-28 16:03 ` Ahmad Fatoum
2020-09-28 16:08 ` Marco Felsch
2020-09-28 15:42 ` [PATCH 6/7] video: imx-hdmi: fix dev_get_drvdata misuse Ahmad Fatoum
2020-09-28 15:42 ` [PATCH 7/7] driver: migrate some from dev_get_drvdata to device_get_match_data Ahmad Fatoum
2020-09-28 15:46 ` [PATCH 1/7] driver: introduce less error-prone dev_get_drvdata alternative Ahmad Fatoum
2020-09-29 6:45 ` Sascha Hauer
2020-09-29 7:32 ` Sascha Hauer
2020-09-29 9:42 ` Ahmad Fatoum
2020-09-30 7:48 ` Sascha Hauer
2020-09-30 13:13 ` Ahmad Fatoum
2020-10-05 8:31 ` Ahmad Fatoum
2020-10-07 8:43 ` Sascha Hauer
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