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kernel & KernelSU: Added new ksu_susfs cli add_sus_path_loop

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- When path is added via add_sus_path_loop, the path will be re-flagged as SUS_PATH on each non-root user app or isolated service starts,
  this may address some issues that the added path via add_sus_path getting its inode status reset or inode re-created in kernel for whatever reason.

- Please also note that only path NOT inside /storage/ and /sdcard/ can be added via add_sus_path_loop.

- usage: ksu_susfs add_sus_path_loop </path/that/is/not/inside/sdcard/>

Co-authored-by: simonpunk <simonpunk2016@gmail.com>
This commit is contained in:
ShirkNeko
2025-07-21 16:23:17 +08:00
parent 329b7f59dc
commit d3c37a293d
1 changed files with 27 additions and 2 deletions
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29
kernel/core_hook.c
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@@ -67,9 +67,12 @@ bool susfs_is_allow_su(void)
extern u32 susfs_zygote_sid;
extern bool susfs_is_mnt_devname_ksu(struct path *path);
#ifdef CONFIG_KSU_SUSFS_SUS_PATH
extern void susfs_run_sus_path_loop(uid_t uid);
#endif // #ifdef CONFIG_KSU_SUSFS_SUS_PATH
#ifdef CONFIG_KSU_SUSFS_ENABLE_LOG
extern bool susfs_is_log_enabled __read_mostly;
#endif
#endif // #ifdef CONFIG_KSU_SUSFS_ENABLE_LOG
#ifdef CONFIG_KSU_SUSFS_TRY_UMOUNT
extern void susfs_run_try_umount_for_current_mnt_ns(void);
#endif // #ifdef CONFIG_KSU_SUSFS_TRY_UMOUNT
@@ -669,6 +672,22 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
pr_info("susfs: copy_to_user() failed\n");
return 0;
}
if (arg2 == CMD_SUSFS_ADD_SUS_PATH_LOOP) {
int error = 0;
if (!ksu_access_ok((void __user*)arg3, sizeof(struct st_susfs_sus_path))) {
pr_err("susfs: CMD_SUSFS_ADD_SUS_PATH_LOOP -> arg3 is not accessible\n");
return 0;
}
if (!ksu_access_ok((void __user*)arg5, sizeof(error))) {
pr_err("susfs: CMD_SUSFS_ADD_SUS_PATH_LOOP -> arg5 is not accessible\n");
return 0;
}
error = susfs_add_sus_path_loop((struct st_susfs_sus_path __user*)arg3);
pr_info("susfs: CMD_SUSFS_ADD_SUS_PATH_LOOP -> ret: %d\n", error);
if (copy_to_user((void __user*)arg5, &error, sizeof(error)))
pr_info("susfs: copy_to_user() failed\n");
return 0;
}
if (arg2 == CMD_SUSFS_SET_ANDROID_DATA_ROOT_PATH) {
int error = 0;
if (!ksu_access_ok((void __user*)arg3, SUSFS_MAX_LEN_PATHNAME)) {
@@ -1259,8 +1278,11 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
susfs_set_current_non_root_user_app_proc();
#ifdef CONFIG_KSU_SUSFS_SUS_SU
susfs_set_current_proc_su_not_allowed();
#endif
#endif // #ifdef CONFIG_KSU_SUSFS_SUS_SU
task_unlock(current);
#ifdef CONFIG_KSU_SUSFS_SUS_PATH
susfs_run_sus_path_loop(new_uid.val);
#endif // #ifdef CONFIG_KSU_SUSFS_SUS_PATH
#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
if (susfs_is_umount_for_zygote_iso_service_enabled) {
goto out_susfs_try_umount_all;
@@ -1287,6 +1309,9 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
susfs_set_current_proc_su_not_allowed();
#endif // #ifdef CONFIG_KSU_SUSFS_SUS_SU
task_unlock(current);
#ifdef CONFIG_KSU_SUSFS_SUS_PATH
susfs_run_sus_path_loop(new_uid.val);
#endif // #ifdef CONFIG_KSU_SUSFS_SUS_PATH
}
#endif // #ifdef CONFIG_KSU_SUSFS