4.17-stable review patch. If anyone has any objections, please let me know.
------------------ From: Daniel Borkmann <[email protected]> [ Upstream commit f605ce5eb26ac934fb8106d75d46a2c875a2bf23 ] If we would ever fail in the bpf_jit_prog() pass that writes the actual insns to the image after we got header via bpf_jit_binary_alloc() then we also need to make sure to free it through bpf_jit_binary_free() again when bailing out. Given we had prior bpf_jit_prog() passes to initially probe for clobbered registers, program size and to fill in addrs arrray for jump targets, this is more of a theoretical one, but at least make sure this doesn't break with future changes. Fixes: 054623105728 ("s390/bpf: Add s390x eBPF JIT compiler backend") Signed-off-by: Daniel Borkmann <[email protected]> Cc: Martin Schwidefsky <[email protected]> Acked-by: Alexei Starovoitov <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/s390/net/bpf_jit_comp.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/s390/net/bpf_jit_comp.c +++ b/arch/s390/net/bpf_jit_comp.c @@ -1391,6 +1391,7 @@ struct bpf_prog *bpf_int_jit_compile(str goto free_addrs; } if (bpf_jit_prog(&jit, fp)) { + bpf_jit_binary_free(header); fp = orig_fp; goto free_addrs; }
