@@ -738,11 +738,16 @@ static int au8522_probe(struct i2c_client *client,
return -EIO;
}
+ demod_config = kzalloc(sizeof(struct au8522_config), GFP_KERNEL);
+ if (!demod_config)
+ return -ENOMEM;
+
/* allocate memory for the internal state */
instance = au8522_get_state(&state, client->adapter, client->addr);
switch (instance) {
case 0:
printk(KERN_ERR "au8522_decoder allocation failed\n");
+ kfree(demod_config);
return -EIO;
case 1:
/* new demod instance */
@@ -754,12 +759,6 @@ static int au8522_probe(struct i2c_client *client,
break;
}
- demod_config = kzalloc(sizeof(struct au8522_config), GFP_KERNEL);
- if (demod_config == NULL) {
- if (instance == 1)
- kfree(state);
- return -ENOMEM;
- }
demod_config->demod_address = 0x8e >> 1;
state->config = demod_config;
As reported by kmemleak: unreferenced object 0xffff880321e1da40 (size 32): comm "modprobe", pid 3309, jiffies 4295019569 (age 2359.636s) hex dump (first 32 bytes): 47 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 G............... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff82278c8e>] kmemleak_alloc+0x4e/0xb0 [<ffffffff8153c08c>] kmem_cache_alloc_trace+0x1ec/0x280 [<ffffffffa13a896a>] au8522_probe+0x19a/0xa30 [au8522_decoder] [<ffffffff81de0032>] i2c_device_probe+0x2b2/0x490 [<ffffffff81ca7004>] driver_probe_device+0x454/0xd90 [<ffffffff81ca7c1b>] __device_attach_driver+0x17b/0x230 [<ffffffff81ca15da>] bus_for_each_drv+0x11a/0x1b0 [<ffffffff81ca6a4d>] __device_attach+0x1cd/0x2c0 [<ffffffff81ca7d43>] device_initial_probe+0x13/0x20 [<ffffffff81ca451f>] bus_probe_device+0x1af/0x250 [<ffffffff81c9e0f3>] device_add+0x943/0x13b0 [<ffffffff81c9eb7a>] device_register+0x1a/0x20 [<ffffffff81de8626>] i2c_new_device+0x5d6/0x8f0 [<ffffffffa0d88ea4>] v4l2_i2c_new_subdev_board+0x1e4/0x250 [v4l2_common] [<ffffffffa0d88fe7>] v4l2_i2c_new_subdev+0xd7/0x110 [v4l2_common] [<ffffffffa13b2f76>] au0828_card_analog_fe_setup+0x2e6/0x3f0 [au0828] Checking where the error happens: (gdb) list *au8522_probe+0x19a 0x99a is in au8522_probe (drivers/media/dvb-frontends/au8522_decoder.c:761). 756 printk(KERN_INFO "au8522_decoder attach existing instance.\n"); 757 break; 758 } 759 760 demod_config = kzalloc(sizeof(struct au8522_config), GFP_KERNEL); 761 if (demod_config == NULL) { 762 if (instance == 1) 763 kfree(state); 764 return -ENOMEM; 765 } Shows that the error pathc is not being handled properly. The issue here is that it should have been calling hybrid_tuner_release_state() function, by calling au8522_release_state(). Yet, it is easier to just reorder the allocation, with makes the error path simpler. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> --- drivers/media/dvb-frontends/au8522_decoder.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-)