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From: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
To: Linux Media Mailing List <linux-media@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
	Mauro Carvalho Chehab <mchehab@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Enrico Weigelt <info@metux.net>,
	Hans Verkuil <hans.verkuil@cisco.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH 7/7] media: ngene: don't try to memcpy from NULL
Date: Thu, 22 Aug 2019 16:39:34 -0300	[thread overview]
Message-ID: <11ef5297a62a8c3cc812495b69398b316e80ad73.1566502743.git.mchehab+samsung@kernel.org> (raw)
In-Reply-To: <4a411ba155eb062b6575aba0824123c840806c0b.1566502743.git.mchehab+samsung@kernel.org>

[drivers/media/pci/ngene/ngene-i2c.c:122] -> [drivers/media/pci/ngene/ngene-i2c.c:39]: (error) Null pointer dereference: out

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---
 drivers/media/pci/ngene/ngene-i2c.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/pci/ngene/ngene-i2c.c b/drivers/media/pci/ngene/ngene-i2c.c
index 2e9e9774dc6f..bfdb7286f6f0 100644
--- a/drivers/media/pci/ngene/ngene-i2c.c
+++ b/drivers/media/pci/ngene/ngene-i2c.c
@@ -36,7 +36,10 @@ static int ngene_command_i2c_read(struct ngene *dev, u8 adr,
 	com.cmd.hdr.Opcode = CMD_I2C_READ;
 	com.cmd.hdr.Length = outlen + 3;
 	com.cmd.I2CRead.Device = adr << 1;
-	memcpy(com.cmd.I2CRead.Data, out, outlen);
+
+	if (out)
+		memcpy(com.cmd.I2CRead.Data, out, outlen);
+
 	com.cmd.I2CRead.Data[outlen] = inlen;
 	com.cmd.I2CRead.Data[outlen + 1] = 0;
 	com.in_len = outlen + 3;
-- 
2.21.0


  parent reply	other threads:[~2019-08-22 19:39 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-22 19:39 [PATCH 1/7] media: remove include stdarg.h from some drivers Mauro Carvalho Chehab
2019-08-22 19:39 ` [PATCH 2/7] media: vicodec: make life easier for static analyzers Mauro Carvalho Chehab
2019-08-22 19:39 ` [PATCH 3/7] media: aspeed-video: address a protential usage of an unit var Mauro Carvalho Chehab
2019-08-22 19:39   ` Mauro Carvalho Chehab
2019-08-26 15:12   ` Eddie James
2019-08-26 15:12     ` Eddie James
2019-08-22 19:39 ` [PATCH 4/7] media: ov9650: add a sanity check Mauro Carvalho Chehab
2019-08-23 10:33   ` Sylwester Nawrocki
2019-08-22 19:39 ` [PATCH 5/7] media: use the BIT() macro Mauro Carvalho Chehab
2019-08-22 19:39   ` Mauro Carvalho Chehab
2019-08-23  0:08   ` Laurent Pinchart
2019-08-23  0:08     ` Laurent Pinchart
2019-08-23  0:08     ` Laurent Pinchart
2019-08-23  9:47     ` [PATCH v2 " Mauro Carvalho Chehab
2019-08-23  9:47       ` Mauro Carvalho Chehab
2019-08-23 10:22       ` Sylwester Nawrocki
2019-08-23 10:22         ` Sylwester Nawrocki
2019-08-23 10:22         ` Sylwester Nawrocki
2019-08-23 12:12       ` Benoit Parrot
2019-08-23 12:12         ` Benoit Parrot
2019-08-23 12:12         ` Benoit Parrot
2019-08-23 20:45       ` Laurent Pinchart
2019-08-23 20:45         ` Laurent Pinchart
2019-08-23 20:45         ` Laurent Pinchart
2019-08-22 19:39 ` [PATCH 6/7] media: don't do an unsigned int with a 31 bit shift Mauro Carvalho Chehab
2019-08-22 19:39   ` Mauro Carvalho Chehab
2019-08-22 19:39   ` Mauro Carvalho Chehab
2019-08-23  9:08   ` Marc Gonzalez
2019-08-23 10:20     ` Mauro Carvalho Chehab
2019-08-23 11:09       ` Marc Gonzalez
2019-08-29 17:03   ` Kees Cook
2019-08-29 17:03     ` Kees Cook
2019-08-29 17:03     ` Kees Cook
2019-08-22 19:39 ` Mauro Carvalho Chehab [this message]
2019-08-22 19:43   ` [PATCH 7/7] media: ngene: don't try to memcpy from NULL Mauro Carvalho Chehab

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