tree 885f83b1f8e96c502c2939838d22e63756c7b011
parent 26bf8a89d887c0686acef0f44eaadd49abfcab03
author Daniel Borkmann <daniel@iogearbox.net> 1529022647 +0200
committer Alexei Starovoitov <ast@kernel.org> 1529086465 -0700

bpf: fix panic in prog load calls cleanup

While testing I found that when hitting error path in bpf_prog_load()
where we jump to free_used_maps and prog contained BPF to BPF calls
that were JITed earlier, then we never clean up the bpf_prog_kallsyms_add()
done under jit_subprogs(). Add proper API to make BPF kallsyms deletion
more clear and fix that.

Fixes: 1c2a088a6626 ("bpf: x64: add JIT support for multi-function programs")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>