diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 202f8f7..9c843a5 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -207,6 +207,9 @@
 
 struct bpf_call_arg_meta {
 	struct bpf_map *map_ptr;
+	bool raw_mode;
+	int regno;
+	int access_size;
 };
 
 /* verbose verifier prints what it's seeing
@@ -789,7 +792,8 @@
  * and all elements of stack are initialized
  */
 static int check_stack_boundary(struct verifier_env *env, int regno,
-				int access_size, bool zero_size_allowed)
+				int access_size, bool zero_size_allowed,
+				struct bpf_call_arg_meta *meta)
 {
 	struct verifier_state *state = &env->cur_state;
 	struct reg_state *regs = state->regs;
@@ -815,6 +819,12 @@
 		return -EACCES;
 	}
 
+	if (meta && meta->raw_mode) {
+		meta->access_size = access_size;
+		meta->regno = regno;
+		return 0;
+	}
+
 	for (i = 0; i < access_size; i++) {
 		if (state->stack_slot_type[MAX_BPF_STACK + off + i] != STACK_MISC) {
 			verbose("invalid indirect read from stack off %d+%d size %d\n",
@@ -859,7 +869,8 @@
 		expected_type = CONST_PTR_TO_MAP;
 	} else if (arg_type == ARG_PTR_TO_CTX) {
 		expected_type = PTR_TO_CTX;
-	} else if (arg_type == ARG_PTR_TO_STACK) {
+	} else if (arg_type == ARG_PTR_TO_STACK ||
+		   arg_type == ARG_PTR_TO_RAW_STACK) {
 		expected_type = PTR_TO_STACK;
 		/* One exception here. In case function allows for NULL to be
 		 * passed in as argument, it's a CONST_IMM type. Final test
@@ -867,6 +878,7 @@
 		 */
 		if (reg->type == CONST_IMM && reg->imm == 0)
 			expected_type = CONST_IMM;
+		meta->raw_mode = arg_type == ARG_PTR_TO_RAW_STACK;
 	} else {
 		verbose("unsupported arg_type %d\n", arg_type);
 		return -EFAULT;
@@ -896,7 +908,7 @@
 			return -EACCES;
 		}
 		err = check_stack_boundary(env, regno, meta->map_ptr->key_size,
-					   false);
+					   false, NULL);
 	} else if (arg_type == ARG_PTR_TO_MAP_VALUE) {
 		/* bpf_map_xxx(..., map_ptr, ..., value) call:
 		 * check [value, value + map->value_size) validity
@@ -907,7 +919,8 @@
 			return -EACCES;
 		}
 		err = check_stack_boundary(env, regno,
-					   meta->map_ptr->value_size, false);
+					   meta->map_ptr->value_size,
+					   false, NULL);
 	} else if (arg_type == ARG_CONST_STACK_SIZE ||
 		   arg_type == ARG_CONST_STACK_SIZE_OR_ZERO) {
 		bool zero_size_allowed = (arg_type == ARG_CONST_STACK_SIZE_OR_ZERO);
@@ -922,7 +935,7 @@
 			return -EACCES;
 		}
 		err = check_stack_boundary(env, regno - 1, reg->imm,
-					   zero_size_allowed);
+					   zero_size_allowed, meta);
 	}
 
 	return err;
@@ -953,6 +966,24 @@
 	return 0;
 }
 
+static int check_raw_mode(const struct bpf_func_proto *fn)
+{
+	int count = 0;
+
+	if (fn->arg1_type == ARG_PTR_TO_RAW_STACK)
+		count++;
+	if (fn->arg2_type == ARG_PTR_TO_RAW_STACK)
+		count++;
+	if (fn->arg3_type == ARG_PTR_TO_RAW_STACK)
+		count++;
+	if (fn->arg4_type == ARG_PTR_TO_RAW_STACK)
+		count++;
+	if (fn->arg5_type == ARG_PTR_TO_RAW_STACK)
+		count++;
+
+	return count > 1 ? -EINVAL : 0;
+}
+
 static int check_call(struct verifier_env *env, int func_id)
 {
 	struct verifier_state *state = &env->cur_state;
@@ -984,6 +1015,15 @@
 
 	memset(&meta, 0, sizeof(meta));
 
+	/* We only support one arg being in raw mode at the moment, which
+	 * is sufficient for the helper functions we have right now.
+	 */
+	err = check_raw_mode(fn);
+	if (err) {
+		verbose("kernel subsystem misconfigured func %d\n", func_id);
+		return err;
+	}
+
 	/* check args */
 	err = check_func_arg(env, BPF_REG_1, fn->arg1_type, &meta);
 	if (err)
@@ -1001,6 +1041,15 @@
 	if (err)
 		return err;
 
+	/* Mark slots with STACK_MISC in case of raw mode, stack offset
+	 * is inferred from register state.
+	 */
+	for (i = 0; i < meta.access_size; i++) {
+		err = check_mem_access(env, meta.regno, i, BPF_B, BPF_WRITE, -1);
+		if (err)
+			return err;
+	}
+
 	/* reset caller saved regs */
 	for (i = 0; i < CALLER_SAVED_REGS; i++) {
 		reg = regs + caller_saved[i];