From 05395a3d86a928d374c970a0b35a6a711072f86c Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 6 Dec 2009 08:32:49 -0300 Subject: V4L/DVB (13576): ir-common: fix an oops caused by the usage of an initialized drvdata As reported by Sander Eikelenboom : > Tried to update my v4l-dvb modules today, but got a bug with my pinnacle > card, seems to be related to the recent changes in the ir code. > > Dec 5 23:30:25 security kernel: [ 5.735698] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 > Dec 5 23:30:25 security kernel: [ 5.735716] IP: [] :ir_common:ir_input_free+0x26/0x3e Thanks-to: Sander Eikelenboom for reporting and testing the fix. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/common/ir-keytable.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/media') diff --git a/drivers/media/common/ir-keytable.c b/drivers/media/common/ir-keytable.c index 26ce5bc2fdd..ceef0e82fb4 100644 --- a/drivers/media/common/ir-keytable.c +++ b/drivers/media/common/ir-keytable.c @@ -419,6 +419,9 @@ void ir_input_free(struct input_dev *dev) { struct ir_scancode_table *rc_tab = input_get_drvdata(dev); + if (!rc_tab) + return; + IR_dprintk(1, "Freed keycode table\n"); rc_tab->size = 0; -- cgit v1.2.3