Add a check to verify the result of xa_load() during the partition
lookups done while registering/unregistering the scheduler receiver
interrupt callbacks and while executing the main scheduler receiver
interrupt callback handler.
Fixes:
0184450b8b1e ("firmware: arm_ffa: Add schedule receiver callback mechanism")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20240108-ffa_fixes_6-8-v1-3-75bf7035bc50@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
void *cb_data;
partition = xa_load(&drv_info->partition_info, part_id);
+ if (!partition) {
+ pr_err("%s: Invalid partition ID 0x%x\n", __func__, part_id);
+ return;
+ }
+
read_lock(&partition->rw_lock);
callback = partition->callback;
cb_data = partition->cb_data;
return -EOPNOTSUPP;
partition = xa_load(&drv_info->partition_info, part_id);
+ if (!partition) {
+ pr_err("%s: Invalid partition ID 0x%x\n", __func__, part_id);
+ return -EINVAL;
+ }
+
write_lock(&partition->rw_lock);
cb_valid = !!partition->callback;