HID: fix possible double-free on error path in hid parser
Freeing of device->collection is properly done in hid_free_device() (as
this function is supposed to free all the device resources and could be
called from transport specific code, e.g. usb_hid_configure()).
Remove all kfree() calls preceeding the hid_free_device() call.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index aeeb679..f4ee1af 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -667,7 +667,6 @@
if (item.format != HID_ITEM_FORMAT_SHORT) {
dbg("unexpected long global item");
- kfree(device->collection);
hid_free_device(device);
kfree(parser);
return NULL;
@@ -676,7 +675,6 @@
if (dispatch_type[item.type](parser, &item)) {
dbg("item %u %u %u %u parsing failed\n",
item.format, (unsigned)item.size, (unsigned)item.type, (unsigned)item.tag);
- kfree(device->collection);
hid_free_device(device);
kfree(parser);
return NULL;
@@ -685,14 +683,12 @@
if (start == end) {
if (parser->collection_stack_ptr) {
dbg("unbalanced collection at end of report description");
- kfree(device->collection);
hid_free_device(device);
kfree(parser);
return NULL;
}
if (parser->local.delimiter_depth) {
dbg("unbalanced delimiter at end of report description");
- kfree(device->collection);
hid_free_device(device);
kfree(parser);
return NULL;
@@ -703,7 +699,6 @@
}
dbg("item fetching failed at offset %d\n", (int)(end - start));
- kfree(device->collection);
hid_free_device(device);
kfree(parser);
return NULL;
