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selinux: use grep to check api supports (#402)

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This checks `selinux_state` and `current_sid` supports in a raw way.
Feels more reliable than the version checks.

Supersedes #401, fixes #280, fixes #400.
This commit is contained in:
华
2023-04-20 15:22:03 +08:00
committed by GitHub
parent 3b9cab3432
commit 3452841752
4 changed files with 19 additions and 9 deletions
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10
kernel/selinux/selinux.c
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@@ -2,7 +2,7 @@
#include "objsec.h"
#include "linux/version.h"
#include "../klog.h" // IWYU pragma: keep
#if ((KERNEL_VERSION(4, 14, 0) <= LINUX_VERSION_CODE) && (LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 163))) || (LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 337))
#ifndef KSU_COMPAT_USE_SELINUX_STATE
#include "avc.h"
#endif
@@ -57,7 +57,7 @@ if (!is_domain_permissive) {
void setenforce(bool enforce)
{
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 163)) || ((KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE) && (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 337)))
#ifdef KSU_COMPAT_USE_SELINUX_STATE
selinux_state.enforcing = enforce;
#else
selinux_enforcing = enforce;
@@ -68,7 +68,7 @@ void setenforce(bool enforce)
bool getenforce()
{
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 163)) || ((KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE) && (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 337)))
#ifdef KSU_COMPAT_USE_SELINUX_STATE
if (selinux_state.disabled) {
#else
if (selinux_disabled) {
@@ -78,7 +78,7 @@ bool getenforce()
#endif
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 163)) || ((KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE) && (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 337)))
#ifdef KSU_COMPAT_USE_SELINUX_STATE
return selinux_state.enforcing;
#else
return selinux_enforcing;
@@ -88,7 +88,7 @@ bool getenforce()
#endif
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 337)
#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0)) && !defined(KSU_COMPAT_HAS_CURRENT_SID)
/*
* get the subjective security ID of the current task
*/