[git:media_tree/fixes] [media] mxl111sf: Fix unintentional garbage stack read

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This is an automatic generated email to let you know that the following patch were queued at the 
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Subject: [media] mxl111sf: Fix unintentional garbage stack read
Author:  Dave Jones <davej@xxxxxxxxxxxxxxxxx>
Date:    Thu Jan 30 00:11:33 2014 -0300

mxl111sf_read_reg takes an address of a variable to write to as an argument.
drivers/media/usb/dvb-usb-v2/mxl111sf-gpio.c:mxl111sf_config_pin_mux_modes
passes several uninitialized stack variables to this routine, expecting
them to be filled in.  In the event that something unexpected happens when
reading from the chip, we end up doing a pr_debug of the value passed in,
revealing whatever garbage happened to be on the stack.

Change the pr_debug to match what happens in the 'success' case, where we
assign buf[1] to *data.

Spotted with Coverity (Bugs 731910 through 731917)

Signed-off-by: Dave Jones <davej@xxxxxxxxxxxxxxxxx>
Signed-off-by: Michael Krufky <mkrufky@xxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>

 drivers/media/usb/dvb-usb-v2/mxl111sf.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

---

http://git.linuxtv.org/media_tree.git?a=commitdiff;h=866e8d8a9dc1ebb4f9e67197e264ac2df81f7d4b

diff --git a/drivers/media/usb/dvb-usb-v2/mxl111sf.c b/drivers/media/usb/dvb-usb-v2/mxl111sf.c
index 8ceff42..c7304fa 100644
--- a/drivers/media/usb/dvb-usb-v2/mxl111sf.c
+++ b/drivers/media/usb/dvb-usb-v2/mxl111sf.c
@@ -105,7 +105,7 @@ int mxl111sf_read_reg(struct mxl111sf_state *state, u8 addr, u8 *data)
 		ret = -EINVAL;
 	}
 
-	pr_debug("R: (0x%02x, 0x%02x)\n", addr, *data);
+	pr_debug("R: (0x%02x, 0x%02x)\n", addr, buf[1]);
 fail:
 	return ret;
 }
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