linux-kernel - [PATCHv2 1/3,RESEND] iio: dht11: Fix out-of-bounds read

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <E1Y8pWE-00012g-Ec@stardust.g4.wien.funkfeuer.at>
Date:	Wed, 07 Jan 2015 13:15:22 +0100
From:	Harald Geyer <harald@...ib.org>
To:	Jonathan Cameron <jic23@...nel.org>
cc:	Richard Weinberger <richard@....at>, knaack.h@....de,
	lars@...afoo.de, pmeerw@...erw.net, sanjeev_sharma@...tor.com,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCHv2 1/3,RESEND] iio: dht11: Fix out-of-bounds read

As we access i-1 we must not start with i=0.

From: Richard Weinberger <richard@....at>
Signed-off-by: Richard Weinberger <richard@....at>
Acked-by: Hartmut Knaack <knaack.h@....de>
Acked-by: Harald Geyer <harald@...ib.org>
Reviewed-by: Sanjeev Sharma <sanjeev_sharma@...tor.com>
---
Resending again to get the metadata right.
No Signed-off-by from me, because I didn't contribute anything.
No changes since v1 except reordering.

 drivers/iio/humidity/dht11.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/iio/humidity/dht11.c b/drivers/iio/humidity/dht11.c
index 623c145..f546eca 100644
--- a/drivers/iio/humidity/dht11.c
+++ b/drivers/iio/humidity/dht11.c
@@ -88,7 +88,7 @@ static int dht11_decode(struct dht11 *dht11, int offset)
 	unsigned char temp_int, temp_dec, hum_int, hum_dec, checksum;
 
 	/* Calculate timestamp resolution */
-	for (i = 0; i < dht11->num_edges; ++i) {
+	for (i = 1; i < dht11->num_edges; ++i) {
 		t = dht11->edges[i].ts - dht11->edges[i-1].ts;
 		if (t > 0 && t < timeres)
 			timeres = t;
-- 
1.7.2.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/