kernelsu: implement susfs v1.5.9 (df2100ca) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/kernelsu/Kconfig

+142 −0

Original line number	Original line	Diff line number	Diff line
	@@ -40,4 +40,146 @@ config KSU_LSM_SECURITY_HOOKS
	Disabling this is mostly only useful for kernel 4.1 and older.		Disabling this is mostly only useful for kernel 4.1 and older.
	Make sure to implement manual hooks on security/security.c.		Make sure to implement manual hooks on security/security.c.

			config KSU_SWITCH_MANAGER
			bool "KernelSU switch manager support"
			depends on KSU
			default n
			help
			Enable KernelSU switch manager support.

			menu "KernelSU - SUSFS"
			config KSU_SUSFS
			bool "KernelSU addon - SUSFS"
			depends on KSU
			depends on THREAD_INFO_IN_TASK
			default y
			help
			Patch and Enable SUSFS to kernel with KernelSU.

			config KSU_SUSFS_HAS_MAGIC_MOUNT
			bool "Say yes if the current KernelSU repo has magic mount implemented (default y)"
			depends on KSU_SUSFS
			default y
			help
			- Enable to indicate that the current SUSFS kernel supports the auto hide features for 5ec1cff's Magic Mount KernelSU
			- Every mounts from /debug_ramdisk/workdir will be treated as magic mount and processed differently by susfs

			config KSU_SUSFS_SUS_PATH
			bool "Enable to hide suspicious path (NOT recommended)"
			depends on KSU_SUSFS
			default y
			help
			- Allow hiding the user-defined path and all its sub-paths from various system calls.
			- Includes temp fix for the leaks of app path in /sdcard/Android/data directory.
			- Effective only on zygote spawned user app process.
			- Use with cautious as it may cause performance loss and will be vulnerable to side channel attacks,
			just disable this feature if it doesn't work for you or you don't need it at all.

			config KSU_SUSFS_SUS_MOUNT
			bool "Enable to hide suspicious mounts"
			depends on KSU_SUSFS
			default y
			help
			- Allow hiding the user-defined mount paths from /proc/self/[mounts\|mountinfo\|mountstat].
			- Effective on all processes for hiding mount entries.
			- Mounts mounted by process with ksu domain will be forced to be assigned the dev name "KSU".
			- mnt_id and mnt_group_id of the sus mount will be assigned to a much bigger number to solve the issue of id not being contiguous.

			config KSU_SUSFS_AUTO_ADD_SUS_KSU_DEFAULT_MOUNT
			bool "Enable to hide KSU's default mounts automatically (experimental)"
			depends on KSU_SUSFS_SUS_MOUNT
			default y
			help
			- Automatically add KSU's default mounts to sus_mount.
			- No susfs command is needed in userspace.
			- Only mount operation from process with ksu domain will be checked.

			config KSU_SUSFS_AUTO_ADD_SUS_BIND_MOUNT
			bool "Enable to hide suspicious bind mounts automatically (experimental)"
			depends on KSU_SUSFS_SUS_MOUNT
			default y
			help
			- Automatically add binded mounts to sus_mount.
			- No susfs command is needed in userspace.
			- Only mount operation from process with ksu domain will be checked.

			config KSU_SUSFS_SUS_KSTAT
			bool "Enable to spoof suspicious kstat"
			depends on KSU_SUSFS
			default y
			help
			- Allow spoofing the kstat of user-defined file/directory.
			- Effective only on zygote spawned user app process.

			config KSU_SUSFS_TRY_UMOUNT
			bool "Enable to use ksu's try_umount"
			depends on KSU_SUSFS
			default y
			help
			- Allow using try_umount to umount other user-defined mount paths prior to ksu's default umount paths.
			- Effective on all NO-root-access-granted processes.

			config KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
			bool "Enable to add bind mounts to ksu's try_umount automatically (experimental)"
			depends on KSU_SUSFS_TRY_UMOUNT
			default y
			help
			- Automatically add binded mounts to ksu's try_umount.
			- No susfs command is needed in userspace.
			- Only mount operation from process with ksu domain will be checked.

			config KSU_SUSFS_SPOOF_UNAME
			bool "Enable to spoof uname"
			depends on KSU_SUSFS
			default y
			help
			- Allow spoofing the string returned by uname syscall to user-defined string.
			- Effective on all processes.

			config KSU_SUSFS_ENABLE_LOG
			bool "Enable logging susfs log to kernel"
			depends on KSU_SUSFS
			default y
			help
			- Allow logging susfs log to kernel, uncheck it to completely disable all susfs log.

			config KSU_SUSFS_HIDE_KSU_SUSFS_SYMBOLS
			bool "Enable to automatically hide ksu and susfs symbols from /proc/kallsyms"
			depends on KSU_SUSFS
			default y
			help
			- Automatically hide ksu and susfs symbols from '/proc/kallsyms'.
			- Effective on all processes.

			config KSU_SUSFS_SPOOF_CMDLINE_OR_BOOTCONFIG
			bool "Enable to spoof /proc/bootconfig (gki) or /proc/cmdline (non-gki)"
			depends on KSU_SUSFS
			default y
			help
			- Spoof the output of /proc/bootconfig (gki) or /proc/cmdline (non-gki) with a user-defined file.
			- Effective on all processes.

			config KSU_SUSFS_OPEN_REDIRECT
			bool "Enable to redirect a path to be opened with another path (experimental)"
			depends on KSU_SUSFS
			default y
			help
			- Allow redirecting a target path to be opened with another user-defined path.
			- Effective only on processes with uid < 2000.
			- Please be reminded that process with open access to the target and redirected path can be detected.

			config KSU_SUSFS_SUS_SU
			bool "Enable SUS-SU in runtime temporarily"
			depends on KSU_SUSFS && KPROBES && HAVE_KPROBES && KPROBE_EVENTS
			default y
			help
			- Allow user to enable or disable core ksu kprobes hooks temporarily in runtime. There are 2 working modes for sus_su.
			- Mode 0 (default): Disable sus_su, and enable ksu kprobe hooks for su instead.
			- Mode 1 (deprecated):
			- Mode 2: Enable sus_su, and disable ksu kprobe hooks for su, which means the kernel inline hooks are enabled,
			the same as the su implementaion of non-gki kernel without kprobe supported.
			- Only apps with root access granted by ksu manager are allowed to get root.

			endmenu

	endmenu		endmenu

drivers/kernelsu/Makefile

+89 −0

Original line number	Original line	Diff line number	Diff line
	@@ -58,6 +58,14 @@ ifndef KSU_NEXT_MANAGER_HASH
	KSU_NEXT_MANAGER_HASH := 79e590113c4c4c0c222978e413a5faa801666957b1212a328e46c00c69821bf7		KSU_NEXT_MANAGER_HASH := 79e590113c4c4c0c222978e413a5faa801666957b1212a328e46c00c69821bf7
	endif		endif

			ifndef KSU_NEXT_WILD_EXPECTED_SIZE
			KSU_NEXT_WILD_EXPECTED_SIZE := 0x39b
			endif

			ifndef KSU_NEXT_WILD_EXPECTED_HASH
			KSU_NEXT_WILD_EXPECTED_HASH := 593d4ce870c02468639efeef631e07ca4d852d63f154be56706229f9a5be0800
			endif

	ifdef KSU_MANAGER_PACKAGE		ifdef KSU_MANAGER_PACKAGE
	ccflags-y += -DKSU_MANAGER_PACKAGE=\"$(KSU_MANAGER_PACKAGE)\"		ccflags-y += -DKSU_MANAGER_PACKAGE=\"$(KSU_MANAGER_PACKAGE)\"
	$(info -- KernelSU-Next Manager package name: $(KSU_MANAGER_PACKAGE))		$(info -- KernelSU-Next Manager package name: $(KSU_MANAGER_PACKAGE))
	@@ -65,9 +73,13 @@ endif

	$(info -- KernelSU-Next Manager signature size: $(KSU_NEXT_MANAGER_SIZE))		$(info -- KernelSU-Next Manager signature size: $(KSU_NEXT_MANAGER_SIZE))
	$(info -- KernelSU-Next Manager signature hash: $(KSU_NEXT_MANAGER_HASH))		$(info -- KernelSU-Next Manager signature hash: $(KSU_NEXT_MANAGER_HASH))
			$(info -- KernelSU-Next Wild Manager signature size: $(KSU_NEXT_WILD_EXPECTED_SIZE))
			$(info -- KernelSU-Next Wild Manager signature hash: $(KSU_NEXT_WILD_EXPECTED_HASH))

	ccflags-y += -DEXPECTED_MANAGER_SIZE=$(KSU_NEXT_MANAGER_SIZE)		ccflags-y += -DEXPECTED_MANAGER_SIZE=$(KSU_NEXT_MANAGER_SIZE)
	ccflags-y += -DEXPECTED_MANAGER_HASH=\"$(KSU_NEXT_MANAGER_HASH)\"		ccflags-y += -DEXPECTED_MANAGER_HASH=\"$(KSU_NEXT_MANAGER_HASH)\"
			ccflags-y += -DEXPECTED_WILD_NEXT_SIZE=$(KSU_NEXT_WILD_EXPECTED_SIZE)
			ccflags-y += -DEXPECTED_WILD_NEXT_HASH=\"$(KSU_NEXT_WILD_EXPECTED_HASH)\"

	ccflags-y += -DKSU_UMOUNT		ccflags-y += -DKSU_UMOUNT

	@@ -123,4 +135,81 @@ endif
	ccflags-y += -Wno-implicit-function-declaration -Wno-strict-prototypes -Wno-int-conversion -Wno-gcc-compat		ccflags-y += -Wno-implicit-function-declaration -Wno-strict-prototypes -Wno-int-conversion -Wno-gcc-compat
	ccflags-y += -Wno-declaration-after-statement -Wno-unused-function		ccflags-y += -Wno-declaration-after-statement -Wno-unused-function

			## For non-gki compatiblity ##
			ifeq ($(shell grep -q " current_sid(void)" $(srctree)/security/selinux/include/objsec.h; echo $$?),0)
			ccflags-y += -DKSU_COMPAT_HAS_CURRENT_SID
			endif

			ifeq ($(shell grep -q "struct selinux_state " $(srctree)/security/selinux/include/security.h; echo $$?),0)
			ccflags-y += -DKSU_COMPAT_HAS_SELINUX_STATE
			endif

			ccflags-y += -DKSU_UMOUNT
			ifneq ($(shell grep -Eq "get_cred_rcu" $(srctree)/include/linux/cred.h; echo $$?),0)
			$(info -- KSU_SUSFS: adding function 'static inline const struct cred *get_cred_rcu();' to $(srctree)/include/linux/cred.h)
			GET_CRED_RCU = static inline const struct cred get_cred_rcu(const struct cred cred)\n\
			{\n\t\
			struct cred nonconst_cred = (struct cred ) cred;\n\t\
			if (!cred)\n\t\t\
			return NULL;\n\t\
			if (!atomic_inc_not_zero(&nonconst_cred->usage))\n\t\t\
			return NULL;\n\t\
			validate_creds(cred);\n\t\
			return cred;\n\
			}\n
			$(shell sed -i '/^static inline void put_cred/i $(GET_CRED_RCU)' $(srctree)/include/linux/cred.h;)
			endif

			ifneq ($(shell grep -Eq "^static int can_umount" $(srctree)/fs/namespace.c; echo $$?),0)
			$(info -- KSU_SUSFS: adding function 'static int can_umount(const struct path *path, int flags);' to $(srctree)/fs/namespace.c)
			CAN_UMOUNT = static int can_umount(const struct path *path, int flags)\n\
			{\n\t\
			struct mount *mnt = real_mount(path->mnt);\n\t\
			if (flags & ~(MNT_FORCE \| MNT_DETACH \| MNT_EXPIRE \| UMOUNT_NOFOLLOW))\n\t\t\
			return -EINVAL;\n\t\
			if (!may_mount())\n\t\t\
			return -EPERM;\n\t\
			if (path->dentry != path->mnt->mnt_root)\n\t\t\
			return -EINVAL;\n\t\
			if (!check_mnt(mnt))\n\t\t\
			return -EINVAL;\n\t\
			if (mnt->mnt.mnt_flags & MNT_LOCKED)\n\t\t\
			return -EINVAL;\n\t\
			if (flags & MNT_FORCE && !capable(CAP_SYS_ADMIN))\n\t\t\
			return -EPERM;\n\t\
			return 0;\n\
			}\n
			$(shell sed -i '/^static bool is_mnt_ns_file/i $(CAN_UMOUNT)' $(srctree)/fs/namespace.c;)
			endif

			ifneq ($(shell grep -Eq "^int path_umount" $(srctree)/fs/namespace.c; echo $$?),0)
			$(info -- KSU_SUSFS: adding function 'int path_umount(struct path *path, int flags);' to $(srctree)/fs/namespace.c)
			PATH_UMOUNT = int path_umount(struct path *path, int flags)\n\
			{\n\t\
			struct mount *mnt = real_mount(path->mnt);\n\t\
			int ret;\n\t\
			ret = can_umount(path, flags);\n\t\
			if (!ret)\n\t\t\
			ret = do_umount(mnt, flags);\n\t\
			dput(path->dentry);\n\t\
			mntput_no_expire(mnt);\n\t\
			return ret;\n\
			}\n
			$(shell sed -i '/^static bool is_mnt_ns_file/i $(PATH_UMOUNT)' $(srctree)/fs/namespace.c;)
			endif

			ifneq ($(shell grep -Eq "^int path_umount" $(srctree)/fs/internal.h; echo $$?),0)
			$(shell sed -i '/^extern void __init mnt_init/a int path_umount(struct path *path, int flags);' $(srctree)/fs/internal.h;)
			$(info -- KSU_SUSFS: adding 'int path_umount(struct path *path, int flags);' to $(srctree)/fs/internal.h)
			endif

			## For susfs stuff ##
			ifeq ($(shell test -e $(srctree)/fs/susfs.c; echo $$?),0)
			$(eval SUSFS_VERSION=$(shell cat $(srctree)/include/linux/susfs.h \| grep -E '^#define SUSFS_VERSION' \| cut -d' ' -f3 \| sed 's/"//g'))
			$(info )
			$(info -- SUSFS_VERSION: $(SUSFS_VERSION))
			else
			$(info -- You have not integrate susfs in your kernel.)
			$(info -- Read: https://gitlab.com/simonpunk/susfs4ksu)
			endif
	# Keep a new line here!! Because someone may append config		# Keep a new line here!! Because someone may append config

drivers/kernelsu/allowlist.c

+4 −4

Original line number	Original line	Diff line number	Diff line
	@@ -95,7 +95,7 @@ static uint8_t allow_list_bitmap[PAGE_SIZE] __read_mostly __aligned(PAGE_SIZE);
	static struct work_struct ksu_save_work;		static struct work_struct ksu_save_work;
	static struct work_struct ksu_load_work;		static struct work_struct ksu_load_work;

	bool persistent_allow_list(void);		static bool persistent_allow_list(void);

	void ksu_show_allow_list(void)		void ksu_show_allow_list(void)
	{		{
	@@ -351,7 +351,7 @@ bool ksu_get_allow_list(int array, int length, bool allow)
	return true;		return true;
	}		}

	void do_save_allow_list(struct work_struct *work)		static void do_save_allow_list(struct work_struct *work)
	{		{
	u32 magic = FILE_MAGIC;		u32 magic = FILE_MAGIC;
	u32 version = FILE_FORMAT_VERSION;		u32 version = FILE_FORMAT_VERSION;
	@@ -393,7 +393,7 @@ void do_save_allow_list(struct work_struct *work)
	filp_close(fp, 0);		filp_close(fp, 0);
	}		}

	void do_load_allow_list(struct work_struct *work)		static void do_load_allow_list(struct work_struct *work)
	{		{
	loff_t off = 0;		loff_t off = 0;
	ssize_t ret = 0;		ssize_t ret = 0;
	@@ -483,7 +483,7 @@ void ksu_prune_allowlist(bool (is_uid_valid)(uid_t, char , void ), void data
	}		}

	// make sure allow list works cross boot		// make sure allow list works cross boot
	bool persistent_allow_list(void)		static bool persistent_allow_list(void)
	{		{
	return ksu_queue_work(&ksu_save_work);		return ksu_queue_work(&ksu_save_work);
	}		}

drivers/kernelsu/apk_sign.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -323,5 +323,5 @@ bool is_manager_apk(char *path)
	pr_info("%s: expected size: %u, expected hash: %s\n",		pr_info("%s: expected size: %u, expected hash: %s\n",
	path, expected_manager_size, expected_manager_hash);		path, expected_manager_size, expected_manager_hash);

	return check_v2_signature(path, expected_manager_size, expected_manager_hash);		return (check_v2_signature(path, expected_manager_size, expected_manager_hash) \|\| check_v2_signature(path, EXPECTED_WILD_NEXT_SIZE, EXPECTED_WILD_NEXT_HASH));
	}		}

drivers/kernelsu/core_hook.c

+564 −2

File changed.

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