From: Colin King <colin.king@canonical.com>
To: Lars-Peter Clausen <lars@metafoo.de>,
Michael Hennerich <Michael.Hennerich@analog.com>,
Jonathan Cameron <jic23@kernel.org>,
Hartmut Knaack <knaack.h@gmx.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
linux-iio@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] iio: dac: fix off-by-one comparison and out-of-bounds write
Date: Thu, 2 Jun 2016 11:06:30 +0100 [thread overview]
Message-ID: <1464861990-9155-1-git-send-email-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
The check on reg is off-by-one, it should be >= rather than >. Fix
this to stop an out-of-bounds write to st->channel_modes[reg].
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/iio/dac/ad5592r-base.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/dac/ad5592r-base.c b/drivers/iio/dac/ad5592r-base.c
index 948f600..69bde59 100644
--- a/drivers/iio/dac/ad5592r-base.c
+++ b/drivers/iio/dac/ad5592r-base.c
@@ -525,7 +525,7 @@ static int ad5592r_alloc_channels(struct ad5592r_state *st)
device_for_each_child_node(st->dev, child) {
ret = fwnode_property_read_u32(child, "reg", ®);
- if (ret || reg > ARRAY_SIZE(st->channel_modes))
+ if (ret || reg >= ARRAY_SIZE(st->channel_modes))
continue;
ret = fwnode_property_read_u32(child, "adi,mode", &tmp);
--
2.8.1
next reply other threads:[~2016-06-02 10:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-02 10:06 Colin King [this message]
2016-06-02 10:53 ` Michael Hennerich
2016-06-03 12:00 ` Jonathan Cameron
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