From 37e310edf3f6090eb118b7fcafd00221c290ac6b Mon Sep 17 00:00:00 2001 From: Peter Senna Tschudin Date: Tue, 30 Oct 2012 11:09:41 -0300 Subject: [PATCH] [media] drivers/media/pci/saa7134/saa7134-dvb.c: Test if videobuf_dvb_get_frontend return NULL Based on commit: e66131cee501ee720b7b58a4b87073b8fbaaaba6 Not testing videobuf_dvb_get_frontend output may cause OOPS if it return NULL. This patch fixes this issue. The semantic patch that found this issue is(http://coccinelle.lip6.fr/): // @@ identifier i,a,b; statement S, S2; @@ i = videobuf_dvb_get_frontend(...); ... when != if (!i) S * if (i->a.b) S2 // Signed-off-by: Peter Senna Tschudin Signed-off-by: Mauro Carvalho Chehab --- drivers/media/pci/saa7134/saa7134-dvb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/pci/saa7134/saa7134-dvb.c b/drivers/media/pci/saa7134/saa7134-dvb.c index b209de40a4f8..27915e501db9 100644 --- a/drivers/media/pci/saa7134/saa7134-dvb.c +++ b/drivers/media/pci/saa7134/saa7134-dvb.c @@ -607,6 +607,9 @@ static int configure_tda827x_fe(struct saa7134_dev *dev, /* Get the first frontend */ fe0 = videobuf_dvb_get_frontend(&dev->frontends, 1); + if (!fe0) + return -EINVAL; + fe0->dvb.frontend = dvb_attach(tda10046_attach, cdec_conf, &dev->i2c_adap); if (fe0->dvb.frontend) { if (cdec_conf->i2c_gate) -- 2.20.1