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[media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 

Some v4l drivers currently don't initialize their struct v4l2_subdev
with zeros, and this is a problem since some of the v4l2 code expects
this. One example is the addition of internal_ops in commit 45f6f84,
after that we are at risk of random oopses with these drivers when code
in v4l2_device_register_subdev tries to dereference sd->internal_ops->*,
as can be shown by the report at http://bugs.launchpad.net/bugs/745213
and analysis of its crash at https://lkml.org/lkml/2011/4/1/168

Use kzalloc within problematic drivers to ensure we have a zeroed struct
v4l2_subdev.

BugLink: http://bugs.launchpad.net/bugs/745213
Cc: <stable@kernel.org>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Herton Ronaldo Krzesinski 2011-04-01 14:12:02 -03:00 committed by Mauro Carvalho Chehab
parent 2b5cb549f8
commit 80845a3316
8 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/media/radio/saa7706h.c
View File

@ -376,7 +376,7 @@ static int __devinit saa7706h_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%02x (%s)\n",
client->addr << 1, client->adapter->name);
state = kmalloc(sizeof(struct saa7706h_state), GFP_KERNEL);
state = kzalloc(sizeof(struct saa7706h_state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;

2
drivers/media/radio/tef6862.c
View File

@ -176,7 +176,7 @@ static int __devinit tef6862_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%02x (%s)\n",
client->addr << 1, client->adapter->name);
state = kmalloc(sizeof(struct tef6862_state), GFP_KERNEL);
state = kzalloc(sizeof(struct tef6862_state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
state->freq = TEF6862_LO_FREQ;

2
drivers/media/video/m52790.c
View File

@ -174,7 +174,7 @@ static int m52790_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = kmalloc(sizeof(struct m52790_state), GFP_KERNEL);
state = kzalloc(sizeof(struct m52790_state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;

2
drivers/media/video/tda9840.c
View File

@ -171,7 +171,7 @@ static int tda9840_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
if (sd == NULL)
return -ENOMEM;
v4l2_i2c_subdev_init(sd, client, &tda9840_ops);

2
drivers/media/video/tea6415c.c
View File

@ -152,7 +152,7 @@ static int tea6415c_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
if (sd == NULL)
return -ENOMEM;
v4l2_i2c_subdev_init(sd, client, &tea6415c_ops);

2
drivers/media/video/tea6420.c
View File

@ -125,7 +125,7 @@ static int tea6420_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
if (sd == NULL)
return -ENOMEM;
v4l2_i2c_subdev_init(sd, client, &tea6420_ops);

2
drivers/media/video/upd64031a.c
View File

@ -230,7 +230,7 @@ static int upd64031a_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
state = kzalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;

2
drivers/media/video/upd64083.c
View File

@ -202,7 +202,7 @@ static int upd64083_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
state = kzalloc(sizeof(struct upd64083_state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;