kernel: bpf: Fix memory leaks in __check_func_call

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix memory leaks in checkfunccall kmemleak reports this issue: unreferenced object 0xffff88817139d000 size 2048: comm "testprogs", pid 33246, jiffies 4307381979 age 45851.820s hex dump first 32 bytes: 01 00 00 00 00 00 00 00...