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switch ns umount

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This commit is contained in:
Ylarod
2025-11-02 11:29:06 +08:00
committed by ShirkNeko
parent 2dfc802d90
commit 589ac304d3
1 changed files with 27 additions and 8 deletions
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35
kernel/core_hook.c
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@@ -1,3 +1,4 @@
#include "linux/slab.h"
#include <linux/seccomp.h>
#include <linux/bpf.h>
#include <linux/capability.h>
@@ -149,8 +150,6 @@ static inline bool is_zygote_normal_app_uid(uid_t uid)
bool ksu_module_mounted = false;
static struct workqueue_struct *ksu_workqueue;
#ifdef CONFIG_COMPAT
bool ksu_is_compat __read_mostly = false;
#endif
@@ -172,6 +171,13 @@ static void ksu_try_escalate_for_uid(uid_t uid)
}
#endif
static struct workqueue_struct *ksu_workqueue;
struct ksu_umount_work {
struct work_struct work;
struct mnt_namespace *mnt_ns;
};
static inline bool is_allow_su(void)
{
if (is_manager()) {
@@ -978,6 +984,11 @@ void susfs_try_umount_all(uid_t uid) {
static void do_umount_work(struct work_struct *work)
{
struct ksu_umount_work *umount_work = container_of(work, struct ksu_umount_work, work);
struct mnt_namespace *old_mnt_ns = current->nsproxy->mnt_ns;
current->nsproxy->mnt_ns = umount_work->mnt_ns;
try_umount("/odm", true, 0);
try_umount("/system", true, 0);
try_umount("/vendor", true, 0);
@@ -995,7 +1006,11 @@ static void do_umount_work(struct work_struct *work)
// try umount lsposed dex2oat bins
try_umount("/apex/com.android.art/bin/dex2oat64", false, MNT_DETACH, uid);
try_umount("/apex/com.android.art/bin/dex2oat32", false, MNT_DETACH, uid);
kfree(work);
current->nsproxy->mnt_ns = old_mnt_ns;
put_mnt_ns(umount_work->mnt_ns);
kfree(umount_work);
}
#ifdef CONFIG_KSU_SUSFS
@@ -1178,14 +1193,18 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
// fixme: use `collect_mounts` and `iterate_mount` to iterate all mountpoint and
// filter the mountpoint whose target is `/data/adb`
struct work_struct *work = kmalloc(sizeof(struct work_struct), GFP_ATOMIC);
if (!work) {
pr_err("Failed to allocate work\n");
struct ksu_umount_work *umount_work = kmalloc(sizeof(struct ksu_umount_work), GFP_ATOMIC);
if (!umount_work) {
pr_err("Failed to allocate umount_work\n");
return 0;
}
INIT_WORK(work, do_umount_work);
queue_work(ksu_workqueue, work);
umount_work->mnt_ns = current->nsproxy->mnt_ns;
get_mnt_ns(umount_work->mnt_ns);
INIT_WORK(&umount_work->work, do_umount_work);
queue_work(ksu_workqueue, &umount_work->work);
return 0;
}