add susfs-dev branch files
This commit is contained in:
樱檩殇雪
16
kernel/selinux/Makefile
Normal file
16
kernel/selinux/Makefile
Normal file
@@ -0,0 +1,16 @@
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obj-y += selinux.o
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obj-y += sepolicy.o
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obj-y += rules.o
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ifeq ($(shell grep -q " current_sid(void)" $(srctree)/security/selinux/include/objsec.h; echo $$?),0)
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ccflags-y += -DKSU_COMPAT_HAS_CURRENT_SID
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endif
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ifeq ($(shell grep -q "struct selinux_state " $(srctree)/security/selinux/include/security.h; echo $$?),0)
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ccflags-y += -DKSU_COMPAT_HAS_SELINUX_STATE
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endif
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ccflags-y += -Wno-implicit-function-declaration -Wno-strict-prototypes -Wno-int-conversion
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ccflags-y += -Wno-declaration-after-statement -Wno-unused-function
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ccflags-y += -I$(srctree)/security/selinux -I$(srctree)/security/selinux/include
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ccflags-y += -I$(objtree)/security/selinux -include $(srctree)/include/uapi/asm-generic/errno.h
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483
kernel/selinux/rules.c
Normal file
483
kernel/selinux/rules.c
Normal file
@@ -0,0 +1,483 @@
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#include <linux/uaccess.h>
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#include <linux/types.h>
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#include <linux/version.h>
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#include "../klog.h" // IWYU pragma: keep
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#include "selinux.h"
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#include "sepolicy.h"
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#include "ss/services.h"
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#include "linux/lsm_audit.h"
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#include "xfrm.h"
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0)
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#define SELINUX_POLICY_INSTEAD_SELINUX_SS
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#endif
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#define KERNEL_SU_DOMAIN "su"
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#define KERNEL_SU_FILE "ksu_file"
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#define KERNEL_EXEC_TYPE "ksu_exec"
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#define ALL NULL
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static struct policydb *get_policydb(void)
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{
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struct policydb *db;
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// selinux_state does not exists before 4.19
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#ifdef KSU_COMPAT_USE_SELINUX_STATE
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#ifdef SELINUX_POLICY_INSTEAD_SELINUX_SS
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struct selinux_policy *policy = rcu_dereference(selinux_state.policy);
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db = &policy->policydb;
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#else
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struct selinux_ss *ss = rcu_dereference(selinux_state.ss);
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db = &ss->policydb;
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#endif
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#else
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db = &policydb;
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#endif
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return db;
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}
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void ksu_apply_kernelsu_rules()
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{
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if (!ksu_getenforce()) {
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pr_info("SELinux permissive or disabled, apply rules!\n");
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}
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rcu_read_lock();
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struct policydb *db = get_policydb();
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ksu_permissive(db, KERNEL_SU_DOMAIN);
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ksu_typeattribute(db, KERNEL_SU_DOMAIN, "mlstrustedsubject");
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ksu_typeattribute(db, KERNEL_SU_DOMAIN, "netdomain");
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ksu_typeattribute(db, KERNEL_SU_DOMAIN, "bluetoothdomain");
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// Create unconstrained file type
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ksu_type(db, KERNEL_SU_FILE, "file_type");
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ksu_typeattribute(db, KERNEL_SU_FILE, "mlstrustedobject");
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ksu_allow(db, ALL, KERNEL_SU_FILE, ALL, ALL);
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// allow all!
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ksu_allow(db, KERNEL_SU_DOMAIN, ALL, ALL, ALL);
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// allow us do any ioctl
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if (db->policyvers >= POLICYDB_VERSION_XPERMS_IOCTL) {
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ksu_allowxperm(db, KERNEL_SU_DOMAIN, ALL, "blk_file", ALL);
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ksu_allowxperm(db, KERNEL_SU_DOMAIN, ALL, "fifo_file", ALL);
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ksu_allowxperm(db, KERNEL_SU_DOMAIN, ALL, "chr_file", ALL);
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ksu_allowxperm(db, KERNEL_SU_DOMAIN, ALL, "file", ALL);
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}
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// we need to save allowlist in /data/adb/ksu
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ksu_allow(db, "kernel", "adb_data_file", "dir", ALL);
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ksu_allow(db, "kernel", "adb_data_file", "file", ALL);
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// we need to search /data/app
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ksu_allow(db, "kernel", "apk_data_file", "file", "open");
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ksu_allow(db, "kernel", "apk_data_file", "dir", "open");
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ksu_allow(db, "kernel", "apk_data_file", "dir", "read");
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ksu_allow(db, "kernel", "apk_data_file", "dir", "search");
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// we may need to do mount on shell
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ksu_allow(db, "kernel", "shell_data_file", "file", ALL);
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// we need to read /data/system/packages.list
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ksu_allow(db, "kernel", "kernel", "capability", "dac_override");
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// Android 10+:
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// http://aospxref.com/android-12.0.0_r3/xref/system/sepolicy/private/file_contexts#512
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ksu_allow(db, "kernel", "packages_list_file", "file", ALL);
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// Kernel 4.4
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ksu_allow(db, "kernel", "packages_list_file", "dir", ALL);
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// Android 9-:
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// http://aospxref.com/android-9.0.0_r61/xref/system/sepolicy/private/file_contexts#360
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ksu_allow(db, "kernel", "system_data_file", "file", ALL);
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ksu_allow(db, "kernel", "system_data_file", "dir", ALL);
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// our ksud triggered by init
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ksu_allow(db, "init", "adb_data_file", "file", ALL);
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ksu_allow(db, "init", "adb_data_file", "dir", ALL); // #1289
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ksu_allow(db, "init", KERNEL_SU_DOMAIN, ALL, ALL);
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// we need to umount modules in zygote
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ksu_allow(db, "zygote", "adb_data_file", "dir", "search");
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// copied from Magisk rules
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// suRights
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ksu_allow(db, "servicemanager", KERNEL_SU_DOMAIN, "dir", "search");
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ksu_allow(db, "servicemanager", KERNEL_SU_DOMAIN, "dir", "read");
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ksu_allow(db, "servicemanager", KERNEL_SU_DOMAIN, "file", "open");
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ksu_allow(db, "servicemanager", KERNEL_SU_DOMAIN, "file", "read");
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ksu_allow(db, "servicemanager", KERNEL_SU_DOMAIN, "process", "getattr");
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ksu_allow(db, ALL, KERNEL_SU_DOMAIN, "process", "sigchld");
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// allowLog
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ksu_allow(db, "logd", KERNEL_SU_DOMAIN, "dir", "search");
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ksu_allow(db, "logd", KERNEL_SU_DOMAIN, "file", "read");
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ksu_allow(db, "logd", KERNEL_SU_DOMAIN, "file", "open");
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ksu_allow(db, "logd", KERNEL_SU_DOMAIN, "file", "getattr");
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// dumpsys
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ksu_allow(db, ALL, KERNEL_SU_DOMAIN, "fd", "use");
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ksu_allow(db, ALL, KERNEL_SU_DOMAIN, "fifo_file", "write");
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ksu_allow(db, ALL, KERNEL_SU_DOMAIN, "fifo_file", "read");
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ksu_allow(db, ALL, KERNEL_SU_DOMAIN, "fifo_file", "open");
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ksu_allow(db, ALL, KERNEL_SU_DOMAIN, "fifo_file", "getattr");
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// bootctl
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ksu_allow(db, "hwservicemanager", KERNEL_SU_DOMAIN, "dir", "search");
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ksu_allow(db, "hwservicemanager", KERNEL_SU_DOMAIN, "file", "read");
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ksu_allow(db, "hwservicemanager", KERNEL_SU_DOMAIN, "file", "open");
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ksu_allow(db, "hwservicemanager", KERNEL_SU_DOMAIN, "process",
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"getattr");
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// For mounting loop devices, mirrors, tmpfs
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ksu_allow(db, "kernel", ALL, "file", "read");
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ksu_allow(db, "kernel", ALL, "file", "write");
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// Allow all binder transactions
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ksu_allow(db, ALL, KERNEL_SU_DOMAIN, "binder", ALL);
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// Allow system server kill su process
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ksu_allow(db, "system_server", KERNEL_SU_DOMAIN, "process", "getpgid");
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ksu_allow(db, "system_server", KERNEL_SU_DOMAIN, "process", "sigkill");
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#ifdef CONFIG_KSU_SUSFS
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// Allow umount in zygote process without installing zygisk
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ksu_allow(db, "zygote", "labeledfs", "filesystem", "unmount");
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susfs_set_init_sid();
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susfs_set_ksu_sid();
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susfs_set_zygote_sid();
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#endif
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rcu_read_unlock();
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}
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#define MAX_SEPOL_LEN 128
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#define CMD_NORMAL_PERM 1
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#define CMD_XPERM 2
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#define CMD_TYPE_STATE 3
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#define CMD_TYPE 4
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#define CMD_TYPE_ATTR 5
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#define CMD_ATTR 6
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#define CMD_TYPE_TRANSITION 7
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#define CMD_TYPE_CHANGE 8
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#define CMD_GENFSCON 9
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struct sepol_data {
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u32 cmd;
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u32 subcmd;
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char __user *sepol1;
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char __user *sepol2;
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char __user *sepol3;
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char __user *sepol4;
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char __user *sepol5;
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char __user *sepol6;
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char __user *sepol7;
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};
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static int get_object(char *buf, char __user *user_object, size_t buf_sz,
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char **object)
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{
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if (!user_object) {
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*object = ALL;
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return 0;
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}
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if (strncpy_from_user(buf, user_object, buf_sz) < 0) {
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return -1;
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}
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*object = buf;
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return 0;
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}
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// reset avc cache table, otherwise the new rules will not take effect if already denied
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static void reset_avc_cache()
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{
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 4, 0) || !defined(KSU_COMPAT_USE_SELINUX_STATE)
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avc_ss_reset(0);
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selnl_notify_policyload(0);
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selinux_status_update_policyload(0);
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#else
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struct selinux_avc *avc = selinux_state.avc;
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avc_ss_reset(avc, 0);
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selnl_notify_policyload(0);
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selinux_status_update_policyload(&selinux_state, 0);
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#endif
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selinux_xfrm_notify_policyload();
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}
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int ksu_handle_sepolicy(unsigned long arg3, void __user *arg4)
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{
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if (!arg4) {
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return -1;
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}
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if (!ksu_getenforce()) {
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pr_info("SELinux permissive or disabled when handle policy!\n");
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}
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struct sepol_data data;
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if (copy_from_user(&data, arg4, sizeof(struct sepol_data))) {
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pr_err("sepol: copy sepol_data failed.\n");
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return -1;
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}
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u32 cmd = data.cmd;
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u32 subcmd = data.subcmd;
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rcu_read_lock();
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struct policydb *db = get_policydb();
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int ret = -1;
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if (cmd == CMD_NORMAL_PERM) {
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char src_buf[MAX_SEPOL_LEN];
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char tgt_buf[MAX_SEPOL_LEN];
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char cls_buf[MAX_SEPOL_LEN];
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char perm_buf[MAX_SEPOL_LEN];
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char *s, *t, *c, *p;
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if (get_object(src_buf, data.sepol1, sizeof(src_buf), &s) < 0) {
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pr_err("sepol: copy src failed.\n");
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goto exit;
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}
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if (get_object(tgt_buf, data.sepol2, sizeof(tgt_buf), &t) < 0) {
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pr_err("sepol: copy tgt failed.\n");
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goto exit;
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}
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if (get_object(cls_buf, data.sepol3, sizeof(cls_buf), &c) < 0) {
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pr_err("sepol: copy cls failed.\n");
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goto exit;
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}
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if (get_object(perm_buf, data.sepol4, sizeof(perm_buf), &p) <
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0) {
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pr_err("sepol: copy perm failed.\n");
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goto exit;
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}
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bool success = false;
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if (subcmd == 1) {
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success = ksu_allow(db, s, t, c, p);
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} else if (subcmd == 2) {
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success = ksu_deny(db, s, t, c, p);
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} else if (subcmd == 3) {
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success = ksu_auditallow(db, s, t, c, p);
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} else if (subcmd == 4) {
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success = ksu_dontaudit(db, s, t, c, p);
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} else {
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pr_err("sepol: unknown subcmd: %d\n", subcmd);
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}
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ret = success ? 0 : -1;
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} else if (cmd == CMD_XPERM) {
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char src_buf[MAX_SEPOL_LEN];
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char tgt_buf[MAX_SEPOL_LEN];
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char cls_buf[MAX_SEPOL_LEN];
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||||
|
||||
char __maybe_unused
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operation[MAX_SEPOL_LEN]; // it is always ioctl now!
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||||
char perm_set[MAX_SEPOL_LEN];
|
||||
|
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char *s, *t, *c;
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if (get_object(src_buf, data.sepol1, sizeof(src_buf), &s) < 0) {
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||||
pr_err("sepol: copy src failed.\n");
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||||
goto exit;
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||||
}
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if (get_object(tgt_buf, data.sepol2, sizeof(tgt_buf), &t) < 0) {
|
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pr_err("sepol: copy tgt failed.\n");
|
||||
goto exit;
|
||||
}
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||||
if (get_object(cls_buf, data.sepol3, sizeof(cls_buf), &c) < 0) {
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||||
pr_err("sepol: copy cls failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(operation, data.sepol4,
|
||||
sizeof(operation)) < 0) {
|
||||
pr_err("sepol: copy operation failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(perm_set, data.sepol5, sizeof(perm_set)) <
|
||||
0) {
|
||||
pr_err("sepol: copy perm_set failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
bool success = false;
|
||||
if (subcmd == 1) {
|
||||
success = ksu_allowxperm(db, s, t, c, perm_set);
|
||||
} else if (subcmd == 2) {
|
||||
success = ksu_auditallowxperm(db, s, t, c, perm_set);
|
||||
} else if (subcmd == 3) {
|
||||
success = ksu_dontauditxperm(db, s, t, c, perm_set);
|
||||
} else {
|
||||
pr_err("sepol: unknown subcmd: %d\n", subcmd);
|
||||
}
|
||||
ret = success ? 0 : -1;
|
||||
} else if (cmd == CMD_TYPE_STATE) {
|
||||
char src[MAX_SEPOL_LEN];
|
||||
|
||||
if (strncpy_from_user(src, data.sepol1, sizeof(src)) < 0) {
|
||||
pr_err("sepol: copy src failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
bool success = false;
|
||||
if (subcmd == 1) {
|
||||
success = ksu_permissive(db, src);
|
||||
} else if (subcmd == 2) {
|
||||
success = ksu_enforce(db, src);
|
||||
} else {
|
||||
pr_err("sepol: unknown subcmd: %d\n", subcmd);
|
||||
}
|
||||
if (success)
|
||||
ret = 0;
|
||||
|
||||
} else if (cmd == CMD_TYPE || cmd == CMD_TYPE_ATTR) {
|
||||
char type[MAX_SEPOL_LEN];
|
||||
char attr[MAX_SEPOL_LEN];
|
||||
|
||||
if (strncpy_from_user(type, data.sepol1, sizeof(type)) < 0) {
|
||||
pr_err("sepol: copy type failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(attr, data.sepol2, sizeof(attr)) < 0) {
|
||||
pr_err("sepol: copy attr failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
bool success = false;
|
||||
if (cmd == CMD_TYPE) {
|
||||
success = ksu_type(db, type, attr);
|
||||
} else {
|
||||
success = ksu_typeattribute(db, type, attr);
|
||||
}
|
||||
if (!success) {
|
||||
pr_err("sepol: %d failed.\n", cmd);
|
||||
goto exit;
|
||||
}
|
||||
ret = 0;
|
||||
|
||||
} else if (cmd == CMD_ATTR) {
|
||||
char attr[MAX_SEPOL_LEN];
|
||||
|
||||
if (strncpy_from_user(attr, data.sepol1, sizeof(attr)) < 0) {
|
||||
pr_err("sepol: copy attr failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (!ksu_attribute(db, attr)) {
|
||||
pr_err("sepol: %d failed.\n", cmd);
|
||||
goto exit;
|
||||
}
|
||||
ret = 0;
|
||||
|
||||
} else if (cmd == CMD_TYPE_TRANSITION) {
|
||||
char src[MAX_SEPOL_LEN];
|
||||
char tgt[MAX_SEPOL_LEN];
|
||||
char cls[MAX_SEPOL_LEN];
|
||||
char default_type[MAX_SEPOL_LEN];
|
||||
char object[MAX_SEPOL_LEN];
|
||||
|
||||
if (strncpy_from_user(src, data.sepol1, sizeof(src)) < 0) {
|
||||
pr_err("sepol: copy src failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(tgt, data.sepol2, sizeof(tgt)) < 0) {
|
||||
pr_err("sepol: copy tgt failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(cls, data.sepol3, sizeof(cls)) < 0) {
|
||||
pr_err("sepol: copy cls failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(default_type, data.sepol4,
|
||||
sizeof(default_type)) < 0) {
|
||||
pr_err("sepol: copy default_type failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
char *real_object;
|
||||
if (data.sepol5 == NULL) {
|
||||
real_object = NULL;
|
||||
} else {
|
||||
if (strncpy_from_user(object, data.sepol5,
|
||||
sizeof(object)) < 0) {
|
||||
pr_err("sepol: copy object failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
real_object = object;
|
||||
}
|
||||
|
||||
bool success = ksu_type_transition(db, src, tgt, cls,
|
||||
default_type, real_object);
|
||||
if (success)
|
||||
ret = 0;
|
||||
|
||||
} else if (cmd == CMD_TYPE_CHANGE) {
|
||||
char src[MAX_SEPOL_LEN];
|
||||
char tgt[MAX_SEPOL_LEN];
|
||||
char cls[MAX_SEPOL_LEN];
|
||||
char default_type[MAX_SEPOL_LEN];
|
||||
|
||||
if (strncpy_from_user(src, data.sepol1, sizeof(src)) < 0) {
|
||||
pr_err("sepol: copy src failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(tgt, data.sepol2, sizeof(tgt)) < 0) {
|
||||
pr_err("sepol: copy tgt failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(cls, data.sepol3, sizeof(cls)) < 0) {
|
||||
pr_err("sepol: copy cls failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(default_type, data.sepol4,
|
||||
sizeof(default_type)) < 0) {
|
||||
pr_err("sepol: copy default_type failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
bool success = false;
|
||||
if (subcmd == 1) {
|
||||
success = ksu_type_change(db, src, tgt, cls,
|
||||
default_type);
|
||||
} else if (subcmd == 2) {
|
||||
success = ksu_type_member(db, src, tgt, cls,
|
||||
default_type);
|
||||
} else {
|
||||
pr_err("sepol: unknown subcmd: %d\n", subcmd);
|
||||
}
|
||||
if (success)
|
||||
ret = 0;
|
||||
} else if (cmd == CMD_GENFSCON) {
|
||||
char name[MAX_SEPOL_LEN];
|
||||
char path[MAX_SEPOL_LEN];
|
||||
char context[MAX_SEPOL_LEN];
|
||||
if (strncpy_from_user(name, data.sepol1, sizeof(name)) < 0) {
|
||||
pr_err("sepol: copy name failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(path, data.sepol2, sizeof(path)) < 0) {
|
||||
pr_err("sepol: copy path failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (strncpy_from_user(context, data.sepol3, sizeof(context)) <
|
||||
0) {
|
||||
pr_err("sepol: copy context failed.\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if (!ksu_genfscon(db, name, path, context)) {
|
||||
pr_err("sepol: %d failed.\n", cmd);
|
||||
goto exit;
|
||||
}
|
||||
ret = 0;
|
||||
} else {
|
||||
pr_err("sepol: unknown cmd: %d\n", cmd);
|
||||
}
|
||||
|
||||
exit:
|
||||
rcu_read_unlock();
|
||||
|
||||
// only allow and xallow needs to reset avc cache, but we cannot do that because
|
||||
// we are in atomic context. so we just reset it every time.
|
||||
reset_avc_cache();
|
||||
|
||||
return ret;
|
||||
}
|
||||
230
kernel/selinux/selinux.c
Normal file
230
kernel/selinux/selinux.c
Normal file
@@ -0,0 +1,230 @@
|
||||
#include "selinux.h"
|
||||
#include "objsec.h"
|
||||
#include "linux/version.h"
|
||||
#include "../klog.h" // IWYU pragma: keep
|
||||
#ifndef KSU_COMPAT_USE_SELINUX_STATE
|
||||
#include "avc.h"
|
||||
#endif
|
||||
|
||||
#define KERNEL_SU_DOMAIN "u:r:su:s0"
|
||||
|
||||
#ifdef CONFIG_KSU_SUSFS
|
||||
#define KERNEL_INIT_DOMAIN "u:r:init:s0"
|
||||
#define KERNEL_ZYGOTE_DOMAIN "u:r:zygote:s0"
|
||||
u32 susfs_ksu_sid = 0;
|
||||
u32 susfs_init_sid = 0;
|
||||
u32 susfs_zygote_sid = 0;
|
||||
#endif
|
||||
|
||||
static int transive_to_domain(const char *domain)
|
||||
{
|
||||
struct cred *cred;
|
||||
struct task_security_struct *tsec;
|
||||
u32 sid;
|
||||
int error;
|
||||
|
||||
cred = (struct cred *)__task_cred(current);
|
||||
|
||||
tsec = cred->security;
|
||||
if (!tsec) {
|
||||
pr_err("tsec == NULL!\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
error = security_secctx_to_secid(domain, strlen(domain), &sid);
|
||||
if (error) {
|
||||
pr_info("security_secctx_to_secid %s -> sid: %d, error: %d\n",
|
||||
domain, sid, error);
|
||||
}
|
||||
if (!error) {
|
||||
tsec->sid = sid;
|
||||
tsec->create_sid = 0;
|
||||
tsec->keycreate_sid = 0;
|
||||
tsec->sockcreate_sid = 0;
|
||||
}
|
||||
return error;
|
||||
}
|
||||
|
||||
void ksu_setup_selinux(const char *domain)
|
||||
{
|
||||
if (transive_to_domain(domain)) {
|
||||
pr_err("transive domain failed.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* we didn't need this now, we have change selinux rules when boot!
|
||||
if (!is_domain_permissive) {
|
||||
if (set_domain_permissive() == 0) {
|
||||
is_domain_permissive = true;
|
||||
}
|
||||
}*/
|
||||
}
|
||||
|
||||
void ksu_setenforce(bool enforce)
|
||||
{
|
||||
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
|
||||
#ifdef KSU_COMPAT_USE_SELINUX_STATE
|
||||
selinux_state.enforcing = enforce;
|
||||
#else
|
||||
selinux_enforcing = enforce;
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
bool ksu_getenforce()
|
||||
{
|
||||
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
|
||||
#ifdef KSU_COMPAT_USE_SELINUX_STATE
|
||||
if (selinux_state.disabled) {
|
||||
#else
|
||||
if (selinux_disabled) {
|
||||
#endif
|
||||
return false;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
|
||||
#ifdef KSU_COMPAT_USE_SELINUX_STATE
|
||||
return selinux_state.enforcing;
|
||||
#else
|
||||
return selinux_enforcing;
|
||||
#endif
|
||||
#else
|
||||
return true;
|
||||
#endif
|
||||
}
|
||||
|
||||
#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0)) && \
|
||||
!defined(KSU_COMPAT_HAS_CURRENT_SID)
|
||||
/*
|
||||
* get the subjective security ID of the current task
|
||||
*/
|
||||
static inline u32 current_sid(void)
|
||||
{
|
||||
const struct task_security_struct *tsec = current_security();
|
||||
|
||||
return tsec->sid;
|
||||
}
|
||||
#endif
|
||||
|
||||
bool ksu_is_ksu_domain()
|
||||
{
|
||||
char *domain;
|
||||
u32 seclen;
|
||||
bool result;
|
||||
int err = security_secid_to_secctx(current_sid(), &domain, &seclen);
|
||||
if (err) {
|
||||
return false;
|
||||
}
|
||||
result = strncmp(KERNEL_SU_DOMAIN, domain, seclen) == 0;
|
||||
security_release_secctx(domain, seclen);
|
||||
return result;
|
||||
}
|
||||
|
||||
bool ksu_is_zygote(void *sec)
|
||||
{
|
||||
struct task_security_struct *tsec = (struct task_security_struct *)sec;
|
||||
if (!tsec) {
|
||||
return false;
|
||||
}
|
||||
char *domain;
|
||||
u32 seclen;
|
||||
bool result;
|
||||
int err = security_secid_to_secctx(tsec->sid, &domain, &seclen);
|
||||
if (err) {
|
||||
return false;
|
||||
}
|
||||
result = strncmp("u:r:zygote:s0", domain, seclen) == 0;
|
||||
security_release_secctx(domain, seclen);
|
||||
return result;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_KSU_SUSFS
|
||||
static inline void susfs_set_sid(const char *secctx_name, u32 *out_sid)
|
||||
{
|
||||
int err;
|
||||
|
||||
if (!secctx_name || !out_sid) {
|
||||
pr_err("secctx_name || out_sid is NULL\n");
|
||||
return;
|
||||
}
|
||||
|
||||
err = security_secctx_to_secid(secctx_name, strlen(secctx_name),
|
||||
out_sid);
|
||||
if (err) {
|
||||
pr_err("failed setting sid for '%s', err: %d\n", secctx_name, err);
|
||||
return;
|
||||
}
|
||||
pr_info("sid '%u' is set for secctx_name '%s'\n", *out_sid, secctx_name);
|
||||
}
|
||||
|
||||
bool susfs_is_sid_equal(void *sec, u32 sid2) {
|
||||
struct task_security_struct *tsec = (struct task_security_struct *)sec;
|
||||
if (!tsec) {
|
||||
return false;
|
||||
}
|
||||
return tsec->sid == sid2;
|
||||
}
|
||||
|
||||
u32 susfs_get_sid_from_name(const char *secctx_name)
|
||||
{
|
||||
u32 out_sid = 0;
|
||||
int err;
|
||||
|
||||
if (!secctx_name) {
|
||||
pr_err("secctx_name is NULL\n");
|
||||
return 0;
|
||||
}
|
||||
err = security_secctx_to_secid(secctx_name, strlen(secctx_name),
|
||||
&out_sid);
|
||||
if (err) {
|
||||
pr_err("failed getting sid from secctx_name: %s, err: %d\n", secctx_name, err);
|
||||
return 0;
|
||||
}
|
||||
return out_sid;
|
||||
}
|
||||
|
||||
u32 susfs_get_current_sid(void) {
|
||||
return current_sid();
|
||||
}
|
||||
|
||||
void susfs_set_zygote_sid(void)
|
||||
{
|
||||
susfs_set_sid(KERNEL_ZYGOTE_DOMAIN, &susfs_zygote_sid);
|
||||
}
|
||||
|
||||
bool susfs_is_current_zygote_domain(void) {
|
||||
return unlikely(current_sid() == susfs_zygote_sid);
|
||||
}
|
||||
|
||||
void susfs_set_ksu_sid(void)
|
||||
{
|
||||
susfs_set_sid(KERNEL_SU_DOMAIN, &susfs_ksu_sid);
|
||||
}
|
||||
|
||||
bool susfs_is_current_ksu_domain(void) {
|
||||
return unlikely(current_sid() == susfs_ksu_sid);
|
||||
}
|
||||
|
||||
void susfs_set_init_sid(void)
|
||||
{
|
||||
susfs_set_sid(KERNEL_INIT_DOMAIN, &susfs_init_sid);
|
||||
}
|
||||
|
||||
bool susfs_is_current_init_domain(void) {
|
||||
return unlikely(current_sid() == susfs_init_sid);
|
||||
}
|
||||
#endif
|
||||
|
||||
#define DEVPTS_DOMAIN "u:object_r:ksu_file:s0"
|
||||
|
||||
u32 ksu_get_devpts_sid()
|
||||
{
|
||||
u32 devpts_sid = 0;
|
||||
int err = security_secctx_to_secid(DEVPTS_DOMAIN, strlen(DEVPTS_DOMAIN),
|
||||
&devpts_sid);
|
||||
if (err) {
|
||||
pr_info("get devpts sid err %d\n", err);
|
||||
}
|
||||
return devpts_sid;
|
||||
}
|
||||
37
kernel/selinux/selinux.h
Normal file
37
kernel/selinux/selinux.h
Normal file
@@ -0,0 +1,37 @@
|
||||
#ifndef __KSU_H_SELINUX
|
||||
#define __KSU_H_SELINUX
|
||||
|
||||
#include "linux/types.h"
|
||||
#include "linux/version.h"
|
||||
|
||||
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0)) || defined(KSU_COMPAT_HAS_SELINUX_STATE)
|
||||
#define KSU_COMPAT_USE_SELINUX_STATE
|
||||
#endif
|
||||
|
||||
void ksu_setup_selinux(const char *);
|
||||
|
||||
void ksu_setenforce(bool);
|
||||
|
||||
bool ksu_getenforce();
|
||||
|
||||
bool ksu_is_ksu_domain();
|
||||
|
||||
bool ksu_is_zygote(void *cred);
|
||||
|
||||
void ksu_apply_kernelsu_rules();
|
||||
|
||||
#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
|
||||
bool susfs_is_sid_equal(void *sec, u32 sid2);
|
||||
u32 susfs_get_sid_from_name(const char *secctx_name);
|
||||
u32 susfs_get_current_sid(void);
|
||||
void susfs_set_zygote_sid(void);
|
||||
bool susfs_is_current_zygote_domain(void);
|
||||
void susfs_set_ksu_sid(void);
|
||||
bool susfs_is_current_ksu_domain(void);
|
||||
void susfs_set_init_sid(void);
|
||||
bool susfs_is_current_init_domain(void);
|
||||
#endif
|
||||
|
||||
u32 ksu_get_devpts_sid();
|
||||
|
||||
#endif
|
||||
1070
kernel/selinux/sepolicy.c
Normal file
1070
kernel/selinux/sepolicy.c
Normal file
File diff suppressed because it is too large
Load Diff
46
kernel/selinux/sepolicy.h
Normal file
46
kernel/selinux/sepolicy.h
Normal file
@@ -0,0 +1,46 @@
|
||||
#ifndef __KSU_H_SEPOLICY
|
||||
#define __KSU_H_SEPOLICY
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
#include "ss/policydb.h"
|
||||
|
||||
// Operation on types
|
||||
bool ksu_type(struct policydb *db, const char *name, const char *attr);
|
||||
bool ksu_attribute(struct policydb *db, const char *name);
|
||||
bool ksu_permissive(struct policydb *db, const char *type);
|
||||
bool ksu_enforce(struct policydb *db, const char *type);
|
||||
bool ksu_typeattribute(struct policydb *db, const char *type, const char *attr);
|
||||
bool ksu_exists(struct policydb *db, const char *type);
|
||||
|
||||
// Access vector rules
|
||||
bool ksu_allow(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *perm);
|
||||
bool ksu_deny(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *perm);
|
||||
bool ksu_auditallow(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *perm);
|
||||
bool ksu_dontaudit(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *perm);
|
||||
|
||||
// Extended permissions access vector rules
|
||||
bool ksu_allowxperm(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *range);
|
||||
bool ksu_auditallowxperm(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *range);
|
||||
bool ksu_dontauditxperm(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *range);
|
||||
|
||||
// Type rules
|
||||
bool ksu_type_transition(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *def, const char *obj);
|
||||
bool ksu_type_change(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *def);
|
||||
bool ksu_type_member(struct policydb *db, const char *src, const char *tgt,
|
||||
const char *cls, const char *def);
|
||||
|
||||
// File system labeling
|
||||
bool ksu_genfscon(struct policydb *db, const char *fs_name, const char *path,
|
||||
const char *ctx);
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user