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HID: logitech-hidpp: leaks and NULL dereferences 

Shift the allocation down a few lines to avoid a memory leak and also
add a check for allocation failure.

Fixes: 2f31c52529 ('HID: Introduce hidpp, a module to handle Logitech hid++ devices')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Dan Carpenter 2014-10-31 12:14:39 +03:00 committed by Jiri Kosina
parent 3a61e97563
commit 3e7830ceb9
1 changed files with 8 additions and 4 deletions
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12
drivers/hid/hid-logitech-hidpp.c
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@ -200,13 +200,15 @@ static int hidpp_send_fap_command_sync(struct hidpp_device *hidpp,
u8 feat_index, u8 funcindex_clientid, u8 *params, int param_count,
struct hidpp_report *response)
{
struct hidpp_report *message = kzalloc(sizeof(struct hidpp_report),
GFP_KERNEL);
struct hidpp_report *message;
int ret;
if (param_count > sizeof(message->fap.params))
return -EINVAL;
message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
if (!message)
return -ENOMEM;
message->report_id = REPORT_ID_HIDPP_LONG;
message->fap.feature_index = feat_index;
message->fap.funcindex_clientid = funcindex_clientid;
@ -221,8 +223,7 @@ static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
u8 report_id, u8 sub_id, u8 reg_address, u8 *params, int param_count,
struct hidpp_report *response)
{
struct hidpp_report *message = kzalloc(sizeof(struct hidpp_report),
GFP_KERNEL);
struct hidpp_report *message;
int ret;
if ((report_id != REPORT_ID_HIDPP_SHORT) &&
@ -232,6 +233,9 @@ static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
if (param_count > sizeof(message->rap.params))
return -EINVAL;
message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
if (!message)
return -ENOMEM;
message->report_id = report_id;
message->rap.sub_id = sub_id;
message->rap.reg_address = reg_address;