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[PATCH] apci: fix NULL deref in video/lcd/brightness

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Fix Null pointer deref in video/lcd/brightness
http://bugzilla.kernel.org/show_bug.cgi?id=5571

Signed-off-by: Yu Luming <luming.yu@gmail.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@redhat.com>
This commit is contained in:
Yu Luming 2005-11-19 15:53:56 -08:00 committed by Greg Kroah-Hartman
parent b72c1d0c14
commit 6968ecfca8
1 changed files with 1 additions and 1 deletions
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2
drivers/acpi/video.c
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@ -813,7 +813,7 @@ acpi_video_device_write_brightness(struct file *file,
ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");
if (!dev || count + 1 > sizeof str)
if (!dev || !dev->brightness || count + 1 > sizeof str)
return_VALUE(-EINVAL);
if (copy_from_user(str, buffer, count))