From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/spmi/spmi-devres.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 drivers/spmi/spmi-devres.c (limited to 'drivers/spmi/spmi-devres.c') diff --git a/drivers/spmi/spmi-devres.c b/drivers/spmi/spmi-devres.c new file mode 100644 index 000000000..62c4b3f24 --- /dev/null +++ b/drivers/spmi/spmi-devres.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2023 Google LLC. + */ + +#include +#include + +static void devm_spmi_controller_release(struct device *parent, void *res) +{ + spmi_controller_put(*(struct spmi_controller **)res); +} + +struct spmi_controller *devm_spmi_controller_alloc(struct device *parent, size_t size) +{ + struct spmi_controller **ptr, *ctrl; + + ptr = devres_alloc(devm_spmi_controller_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + ctrl = spmi_controller_alloc(parent, size); + if (IS_ERR(ctrl)) { + devres_free(ptr); + return ctrl; + } + + *ptr = ctrl; + devres_add(parent, ptr); + + return ctrl; +} +EXPORT_SYMBOL_GPL(devm_spmi_controller_alloc); + +static void devm_spmi_controller_remove(struct device *parent, void *res) +{ + spmi_controller_remove(*(struct spmi_controller **)res); +} + +int devm_spmi_controller_add(struct device *parent, struct spmi_controller *ctrl) +{ + struct spmi_controller **ptr; + int ret; + + ptr = devres_alloc(devm_spmi_controller_remove, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + ret = spmi_controller_add(ctrl); + if (ret) { + devres_free(ptr); + return ret; + } + + *ptr = ctrl; + devres_add(parent, ptr); + + return 0; + +} +EXPORT_SYMBOL_GPL(devm_spmi_controller_add); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SPMI devres helpers"); -- cgit v1.3.1