diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index 12e98a0a58e5..7f591d71ab28 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -441,6 +441,7 @@ struct nfp_bpf_subprog_info { * @prog: machine code * @prog_len: number of valid instructions in @prog array * @__prog_alloc_len: alloc size of @prog array + * @stack_size: total amount of stack used * @verifier_meta: temporary storage for verifier's insn meta * @type: BPF program type * @last_bpf_off: address of the last instruction translated from BPF @@ -465,6 +466,8 @@ struct nfp_prog { unsigned int prog_len; unsigned int __prog_alloc_len; + unsigned int stack_size; + struct nfp_insn_meta *verifier_meta; enum bpf_prog_type type; diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c index 658c7143d59c..ba8ceedcf6a2 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c @@ -489,7 +489,7 @@ nfp_net_bpf_load(struct nfp_net *nn, struct bpf_prog *prog, struct netlink_ext_ack *extack) { struct nfp_prog *nfp_prog = prog->aux->offload->dev_priv; - unsigned int max_mtu; + unsigned int max_mtu, max_stack, max_prog_len; dma_addr_t dma_addr; void *img; int err; @@ -500,6 +500,18 @@ nfp_net_bpf_load(struct nfp_net *nn, struct bpf_prog *prog, return -EOPNOTSUPP; } + max_stack = nn_readb(nn, NFP_NET_CFG_BPF_STACK_SZ) * 64; + if (nfp_prog->stack_size > max_stack) { + NL_SET_ERR_MSG_MOD(extack, "stack too large"); + return -EOPNOTSUPP; + } + + max_prog_len = nn_readw(nn, NFP_NET_CFG_BPF_MAX_LEN); + if (nfp_prog->prog_len > max_prog_len) { + NL_SET_ERR_MSG_MOD(extack, "program too long"); + return -EOPNOTSUPP; + } + img = nfp_bpf_relo_for_vnic(nfp_prog, nn->app_priv); if (IS_ERR(img)) return PTR_ERR(img); diff --git a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c index e04035c116a4..99f977bfd8cc 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c @@ -747,9 +747,9 @@ continue_subprog: static int nfp_bpf_finalize(struct bpf_verifier_env *env) { - unsigned int stack_size, stack_needed; struct bpf_subprog_info *info; struct nfp_prog *nfp_prog; + unsigned int max_stack; struct nfp_net *nn; int i; @@ -777,11 +777,12 @@ static int nfp_bpf_finalize(struct bpf_verifier_env *env) } nn = netdev_priv(env->prog->aux->offload->netdev); - stack_size = nn_readb(nn, NFP_NET_CFG_BPF_STACK_SZ) * 64; - stack_needed = nfp_bpf_get_stack_usage(nfp_prog, env->prog->len); - if (stack_needed > stack_size) { + max_stack = nn_readb(nn, NFP_NET_CFG_BPF_STACK_SZ) * 64; + nfp_prog->stack_size = nfp_bpf_get_stack_usage(nfp_prog, + env->prog->len); + if (nfp_prog->stack_size > max_stack) { pr_vlog(env, "stack too large: program %dB > FW stack %dB\n", - stack_needed, stack_size); + nfp_prog->stack_size, max_stack); return -EOPNOTSUPP; }