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-rw-r--r--arch/ia64/kernel/perfmon.c32
1 files changed, 20 insertions, 12 deletions
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index dd38db46a77..0e499757309 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -2399,25 +2399,33 @@ error_kmem:
static int
pfm_bad_permissions(struct task_struct *task)
{
+ const struct cred *tcred;
uid_t uid = current_uid();
gid_t gid = current_gid();
+ int ret;
+
+ rcu_read_lock();
+ tcred = __task_cred(task);
/* inspired by ptrace_attach() */
DPRINT(("cur: uid=%d gid=%d task: euid=%d suid=%d uid=%d egid=%d sgid=%d\n",
uid,
gid,
- task->euid,
- task->suid,
- task->uid,
- task->egid,
- task->sgid));
-
- return (uid != task->euid)
- || (uid != task->suid)
- || (uid != task->uid)
- || (gid != task->egid)
- || (gid != task->sgid)
- || (gid != task->gid)) && !capable(CAP_SYS_PTRACE);
+ tcred->euid,
+ tcred->suid,
+ tcred->uid,
+ tcred->egid,
+ tcred->sgid));
+
+ ret = ((uid != tcred->euid)
+ || (uid != tcred->suid)
+ || (uid != tcred->uid)
+ || (gid != tcred->egid)
+ || (gid != tcred->sgid)
+ || (gid != tcred->gid)) && !capable(CAP_SYS_PTRACE);
+
+ rcu_read_unlock();
+ return ret;
}
static int