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Correctly handle is_ksu_domain, close #972 (#1246)

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fix #972
This commit is contained in:
Ylarod
2024-01-04 14:14:31 +08:00
committed by GitHub
parent 5f31571cc7
commit f37cc16117
1 changed files with 7 additions and 6 deletions
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13
kernel/selinux/selinux.c
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@@ -8,8 +8,6 @@
#define KERNEL_SU_DOMAIN "u:r:su:s0" #define KERNEL_SU_DOMAIN "u:r:su:s0"
static u32 ksu_sid;
static int transive_to_domain(const char *domain) static int transive_to_domain(const char *domain)
{ {
struct cred *cred; struct cred *cred;
@@ -31,9 +29,6 @@ static int transive_to_domain(const char *domain)
domain, sid, error); domain, sid, error);
} }
if (!error) { if (!error) {
if (!ksu_sid)
ksu_sid = sid;
tsec->sid = sid; tsec->sid = sid;
tsec->create_sid = 0; tsec->create_sid = 0;
tsec->keycreate_sid = 0; tsec->keycreate_sid = 0;
@@ -106,7 +101,13 @@ static inline u32 current_sid(void)
bool is_ksu_domain() bool is_ksu_domain()
{ {
return ksu_sid && current_sid() == ksu_sid; char *domain;
u32 seclen;
int err = security_secid_to_secctx(current_sid(), &domain, &seclen);
if (err) {
return false;
}
return strncmp(KERNEL_SU_DOMAIN, domain, seclen) == 0;
} }
bool is_zygote(void *sec) bool is_zygote(void *sec)