V4L/DVB (13016): kmalloc failure ignored in lgdt3304_attach() and s921_attach()

Prevent NULL dereference if kmalloc() fails.

Cc: Markus Rechberger <mrechberger@sundtek.de>
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: NDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/lgdt3304.c

@@ -363,6 +363,8 @@ struct dvb_frontend* lgdt3304_attach(const struct lgdt3304_config *config,
 
 	struct lgdt3304_state *state;
 	state = kzalloc(sizeof(struct lgdt3304_state), GFP_KERNEL);
+	if (state == NULL)
+		return NULL;
 	state->addr = config->i2c_address;
 	state->i2c = i2c;
 

drivers/media/dvb/frontends/s921_module.c

@@ -169,6 +169,8 @@ struct dvb_frontend* s921_attach(const struct s921_config *config,
 
 	struct s921_state *state;
 	state = kzalloc(sizeof(struct s921_state), GFP_KERNEL);
+	if (state == NULL)
+		return NULL;
 
 	state->addr = config->i2c_address;
 	state->i2c = i2c;