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/thunderbolt/configfs.c | 61 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 drivers/thunderbolt/configfs.c (limited to 'drivers/thunderbolt/configfs.c') diff --git a/drivers/thunderbolt/configfs.c b/drivers/thunderbolt/configfs.c new file mode 100644 index 000000000..dc6bc363d --- /dev/null +++ b/drivers/thunderbolt/configfs.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ConfigFS support + * + * Copyright (C) 2026, Intel Corporation + * Author: Mika Westerberg + */ + +#include +#include + +#include "tb.h" + +static const struct config_item_type tb_root_group_type = { + .ct_owner = THIS_MODULE, +}; + +static struct configfs_subsystem tb_configfs = { + .su_group = { + .cg_item = { + .ci_namebuf = "thunderbolt", + .ci_type = &tb_root_group_type, + }, + }, +}; + +/** + * tb_configfs_register_group() - Register Thunderbolt ConfigFS group + * @group: Group to register. + * + * Registers the new @group under Thunderbolt subsystem ConfigFS. + * + * Return: 0% in case of success, negative errno otherwise. + */ +int tb_configfs_register_group(struct config_group *group) +{ + return configfs_register_group(&tb_configfs.su_group, group); +} +EXPORT_SYMBOL_GPL(tb_configfs_register_group); + +/** + * tb_configfs_unregister_group() - Unregister previously registered group + * @group: Group to unregister. + */ +void tb_configfs_unregister_group(struct config_group *group) +{ + configfs_unregister_group(group); +} +EXPORT_SYMBOL_GPL(tb_configfs_unregister_group); + +int tb_configfs_init(void) +{ + config_group_init(&tb_configfs.su_group); + mutex_init(&tb_configfs.su_mutex); + return configfs_register_subsystem(&tb_configfs); +} + +void tb_configfs_exit(void) +{ + configfs_unregister_subsystem(&tb_configfs); +} -- cgit v1.3.1