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kernel: no need to umount and mark as root for manager uid (#1549)

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Co-authored-by: LoveSy <shana@zju.edu.cn>
This commit is contained in:
5ec1cff
2024-03-29 09:15:18 +08:00
committed by GitHub
parent f8c6c747b3
commit fd17e852d0
1 changed files with 10 additions and 0 deletions
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10
kernel/allowlist.c
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@@ -16,6 +16,7 @@
#include "selinux/selinux.h" #include "selinux/selinux.h"
#include "kernel_compat.h" #include "kernel_compat.h"
#include "allowlist.h" #include "allowlist.h"
#include "manager.h"
#define FILE_MAGIC 0x7f4b5355 // ' KSU', u32 #define FILE_MAGIC 0x7f4b5355 // ' KSU', u32
#define FILE_FORMAT_VERSION 3 // u32 #define FILE_FORMAT_VERSION 3 // u32
@@ -274,6 +275,11 @@ bool __ksu_is_allow_uid(uid_t uid)
return false; return false;
} }
if (likely(ksu_is_manager_uid_valid()) && unlikely(ksu_get_manager_uid() == uid)) {
// manager is always allowed!
return true;
}
if (likely(uid <= BITMAP_UID_MAX)) { if (likely(uid <= BITMAP_UID_MAX)) {
return !!(allow_list_bitmap[uid / BITS_PER_BYTE] & (1 << (uid % BITS_PER_BYTE))); return !!(allow_list_bitmap[uid / BITS_PER_BYTE] & (1 << (uid % BITS_PER_BYTE)));
} else { } else {
@@ -289,6 +295,10 @@ bool __ksu_is_allow_uid(uid_t uid)
bool ksu_uid_should_umount(uid_t uid) bool ksu_uid_should_umount(uid_t uid)
{ {
struct app_profile profile = { .current_uid = uid }; struct app_profile profile = { .current_uid = uid };
if (likely(ksu_is_manager_uid_valid()) && unlikely(ksu_get_manager_uid() == uid)) {
// we should not umount on manager!
return false;
}
bool found = ksu_get_app_profile(&profile); bool found = ksu_get_app_profile(&profile);
if (!found) { if (!found) {
// no app profile found, it must be non root app // no app profile found, it must be non root app