diff options
Diffstat (limited to 'arch/arm64/net/bpf_jit_comp.c')
-rw-r--r-- | arch/arm64/net/bpf_jit_comp.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index 7f0258ed1f5f..321d3880fe13 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -685,6 +685,19 @@ emit_cond_jmp: } break; + /* speculation barrier */ + case BPF_ST | BPF_NOSPEC: + /* + * Nothing required here. + * + * In case of arm64, we rely on the firmware mitigation of + * Speculative Store Bypass as controlled via the ssbd kernel + * parameter. Whenever the mitigation is enabled, it works + * for all of the kernel code with no need to provide any + * additional instructions. + */ + break; + /* ST: *(size *)(dst + off) = imm */ case BPF_ST | BPF_MEM | BPF_W: case BPF_ST | BPF_MEM | BPF_H: @@ -925,6 +938,7 @@ skip_init_ctx: bpf_jit_binary_free(header); prog->bpf_func = NULL; prog->jited = 0; + prog->jited_len = 0; goto out_off; } bpf_jit_binary_lock_ro(header); |