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Commit 6e852651 authored by Mimi Zohar's avatar Mimi Zohar Committed by James Morris
Browse files

firmware: add call to LSM hook before firmware sysfs fallback 



Add an LSM hook prior to allowing firmware sysfs fallback loading.

Signed-off-by: default avatarMimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: default avatarLuis R. Rodriguez <mcgrof@kernel.org>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarJames Morris <james.morris@microsoft.com>
parent 16c267aa

drivers/base/firmware_loader/fallback.c

+7 −0
Original line number Diff line number Diff line
@@ -651,6 +651,8 @@ static bool fw_force_sysfs_fallback(enum fw_opt opt_flags) 


static bool fw_run_sysfs_fallback(enum fw_opt opt_flags)

{

	int ret;



	if (fw_fallback_config.ignore_sysfs_fallback) {

		pr_info_once("Ignoring firmware sysfs fallback due to sysctl knob\n");

		return false;
@@ -659,6 +661,11 @@ static bool fw_run_sysfs_fallback(enum fw_opt opt_flags) 
	if ((opt_flags & FW_OPT_NOFALLBACK))

		return false;



	/* Also permit LSMs and IMA to fail firmware sysfs fallback */

	ret = security_kernel_load_data(LOADING_FIRMWARE);

	if (ret < 0)

		return ret;



	return fw_force_sysfs_fallback(opt_flags);

}