diff options
Diffstat (limited to 'kernel/bpf/verifier.c')
| -rw-r--r-- | kernel/bpf/verifier.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 46ba86c540e2..047b2e876399 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -20,6 +20,7 @@ #include <linux/perf_event.h> #include <linux/ctype.h> #include <linux/error-injection.h> +#include <linux/bpf_lsm.h> #include "disasm.h" @@ -6492,8 +6493,9 @@ static int check_return_code(struct bpf_verifier_env *env) struct tnum range = tnum_range(0, 1); int err; - /* The struct_ops func-ptr's return type could be "void" */ - if (env->prog->type == BPF_PROG_TYPE_STRUCT_OPS && + /* LSM and struct_ops func-ptr's return type could be "void" */ + if ((env->prog->type == BPF_PROG_TYPE_STRUCT_OPS || + env->prog->type == BPF_PROG_TYPE_LSM) && !prog->aux->attach_func_proto->type) return 0; @@ -9923,7 +9925,9 @@ static int check_attach_btf_id(struct bpf_verifier_env *env) if (prog->type == BPF_PROG_TYPE_STRUCT_OPS) return check_struct_ops_btf_id(env); - if (prog->type != BPF_PROG_TYPE_TRACING && !prog_extension) + if (prog->type != BPF_PROG_TYPE_TRACING && + prog->type != BPF_PROG_TYPE_LSM && + !prog_extension) return 0; if (!btf_id) { @@ -10054,8 +10058,16 @@ static int check_attach_btf_id(struct bpf_verifier_env *env) return -EINVAL; /* fallthrough */ case BPF_MODIFY_RETURN: + case BPF_LSM_MAC: case BPF_TRACE_FENTRY: case BPF_TRACE_FEXIT: + prog->aux->attach_func_name = tname; + if (prog->type == BPF_PROG_TYPE_LSM) { + ret = bpf_lsm_verify_prog(&env->log, prog); + if (ret < 0) + return ret; + } + if (!btf_type_is_func(t)) { verbose(env, "attach_btf_id %u is not a function\n", btf_id); @@ -10070,7 +10082,6 @@ static int check_attach_btf_id(struct bpf_verifier_env *env) tr = bpf_trampoline_lookup(key); if (!tr) return -ENOMEM; - prog->aux->attach_func_name = tname; /* t is either vmlinux type or another program's type */ prog->aux->attach_func_proto = t; mutex_lock(&tr->mutex); |