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-rw-r--r--kernel/sys.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index c4d6b59553e..ccc9eb736d3 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -112,14 +112,17 @@ EXPORT_SYMBOL(cad_pid);
void (*pm_power_off_prepare)(void);
+/*
+ * set the priority of a task
+ * - the caller must hold the RCU read lock
+ */
static int set_one_prio(struct task_struct *p, int niceval, int error)
{
- uid_t euid = current_euid();
+ const struct cred *cred = current_cred(), *pcred = __task_cred(p);
int no_nice;
- if (p->cred->uid != euid &&
- p->cred->euid != euid &&
- !capable(CAP_SYS_NICE)) {
+ if (pcred->uid != cred->euid &&
+ pcred->euid != cred->euid && !capable(CAP_SYS_NICE)) {
error = -EPERM;
goto out;
}