From: Daniel Scheller <d.scheller.oss@gmail.com>
To: linux-media@vger.kernel.org, mchehab@kernel.org,
mchehab@s-opensource.com
Cc: jasmin@anw.at, d_spingler@gmx.de, rjkm@metzlerbros.de
Subject: [PATCH 09/14] [media] ddbridge: fix possible buffer overflow in ddb_ports_init()
Date: Sun, 9 Jul 2017 21:42:16 +0200 [thread overview]
Message-ID: <20170709194221.10255-10-d.scheller.oss@gmail.com> (raw)
In-Reply-To: <20170709194221.10255-1-d.scheller.oss@gmail.com>
From: Daniel Scheller <d.scheller@gmx.net>
Report from smatch:
drivers/media/pci/ddbridge/ddbridge-core.c:2659 ddb_ports_init() error: buffer overflow 'dev->port' 32 <= u32max
Fix by making sure "p" is greater than zero before checking for
"dev->port[].type == DDB_CI_EXTERNAL_XO2".
Cc: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
---
drivers/media/pci/ddbridge/ddbridge-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c b/drivers/media/pci/ddbridge/ddbridge-core.c
index aba53fd27f3e..8981795b0819 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -2551,7 +2551,7 @@ void ddb_ports_init(struct ddb *dev)
port->dvb[0].adap = &dev->adap[2 * p];
port->dvb[1].adap = &dev->adap[2 * p + 1];
- if ((port->class == DDB_PORT_NONE) && i &&
+ if ((port->class == DDB_PORT_NONE) && i && p > 0 &&
dev->port[p - 1].type == DDB_CI_EXTERNAL_XO2) {
port->class = DDB_PORT_CI;
port->type = DDB_CI_EXTERNAL_XO2_B;
--
2.13.0
next prev parent reply other threads:[~2017-07-09 19:42 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-09 19:42 [PATCH 00/14] ddbridge: bump to ddbridge-0.9.29 Daniel Scheller
2017-07-09 19:42 ` [PATCH 01/14] [media] ddbridge: move/reorder functions Daniel Scheller
2017-07-09 19:42 ` [PATCH 02/14] [media] ddbridge: split code into multiple files Daniel Scheller
2017-07-09 19:42 ` [PATCH 03/14] [media] ddbridge: bump ddbridge code to version 0.9.29 Daniel Scheller
2017-07-09 19:42 ` [PATCH 04/14] [media] ddbridge: split I/O related functions off from ddbridge.h Daniel Scheller
2017-07-09 19:42 ` [PATCH 05/14] [media] ddbridge: split off IRQ handling Daniel Scheller
2017-07-09 19:42 ` [PATCH 06/14] [media] ddbridge: split off hardware definitions and mappings Daniel Scheller
2017-07-09 19:42 ` [PATCH 07/14] [media] ddbridge: check pointers before dereferencing Daniel Scheller
2017-07-09 19:42 ` [PATCH 08/14] [media] ddbridge: only register frontends in fe2 if fe is not NULL Daniel Scheller
2017-07-09 19:42 ` Daniel Scheller [this message]
2017-07-10 8:21 ` [PATCH 09/14] [media] ddbridge: fix possible buffer overflow in ddb_ports_init() Ralph Metzler
2017-07-10 15:32 ` Daniel Scheller
2017-07-09 19:42 ` [PATCH 10/14] [media] ddbridge: remove unreachable code Daniel Scheller
2017-07-10 8:24 ` Ralph Metzler
2017-07-10 15:34 ` Daniel Scheller
2017-07-09 19:42 ` [PATCH 11/14] [media] ddbridge: fix impossible condition warning Daniel Scheller
2017-07-09 19:42 ` [PATCH 12/14] [media] ddbridge: fix dereference before check Daniel Scheller
2017-07-09 19:42 ` [PATCH 13/14] [media] ddbridge: Kconfig option to control the MSI modparam default Daniel Scheller
2017-07-09 19:42 ` [PATCH 14/14] [media] MAINTAINERS: add entry for ddbridge Daniel Scheller
2017-07-10 8:11 ` [PATCH 00/14] ddbridge: bump to ddbridge-0.9.29 Ralph Metzler
2017-07-10 15:31 ` Daniel Scheller
2017-07-11 9:11 ` Ralph Metzler
2017-07-11 15:30 ` Daniel Scheller
2017-07-20 15:24 ` Mauro Carvalho Chehab
2017-07-20 18:25 ` Daniel Scheller
2017-07-20 21:16 ` Jasmin J.
2017-07-15 20:37 ` Richard Scobie
2017-07-23 12:16 ` Daniel Scheller
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