android/SukiSU-Ultra
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

kernel: core_hook: refactor escape_to_root

Browse Source 
- Remove BUG_ON, bail out when failed
- Add put_cred

Signed-off-by: rsuntk <rissu.ntk@gmail.com>
This commit is contained in:
backslashxx
2025-06-10 07:43:45 +07:00
committed by ShirkNeko
parent 0a5a024dc8
commit 1726d0da58
1 changed files with 14 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
kernel/core_hook.c
View File

@@ -217,18 +217,23 @@ void ksu_escape_to_root(void)
{ {
struct cred *cred; struct cred *cred;
if (current_euid().val == 0) {
pr_warn("Already root, don't escape!\n");
return;
}
rcu_read_lock(); rcu_read_lock();
do { do {
cred = (struct cred *)__task_cred((current)); cred = (struct cred *)__task_cred((current));
BUG_ON(!cred); if (!cred) {
pr_err("%s: cred is NULL! bailing out..\n", __func__);
rcu_read_unlock();
return;
}
} while (!get_cred_rcu(cred)); } while (!get_cred_rcu(cred));
if (cred->euid.val == 0) { rcu_read_unlock();
pr_warn("Already root, don't escape!\n");
rcu_read_unlock();
return;
}
struct root_profile *profile = ksu_get_root_profile(cred->uid.val); struct root_profile *profile = ksu_get_root_profile(cred->uid.val);
@@ -260,7 +265,7 @@ void ksu_escape_to_root(void)
setup_groups(profile, cred); setup_groups(profile, cred);
rcu_read_unlock(); put_cred(cred); // - release here - include/linux/cred.h
// Refer to kernel/seccomp.c: seccomp_set_mode_strict // Refer to kernel/seccomp.c: seccomp_set_mode_strict
// When disabling Seccomp, ensure that current->sighand->siglock is held during the operation. // When disabling Seccomp, ensure that current->sighand->siglock is held during the operation.