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-rw-r--r--kernel/sys.c33
1 files changed, 20 insertions, 13 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index 5d0b44cd435c..ddd28e261f3a 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1022,23 +1022,30 @@ asmlinkage long sys_getpgrp(void)
asmlinkage long sys_getsid(pid_t pid)
{
+ struct task_struct *p;
+ struct pid *sid;
+ int retval;
+
+ rcu_read_lock();
if (!pid)
- return task_session_vnr(current);
+ sid = task_session(current);
else {
- int retval;
- struct task_struct *p;
-
- rcu_read_lock();
- p = find_task_by_vpid(pid);
retval = -ESRCH;
- if (p) {
- retval = security_task_getsid(p);
- if (!retval)
- retval = task_session_vnr(p);
- }
- rcu_read_unlock();
- return retval;
+ p = find_task_by_vpid(pid);
+ if (!p)
+ goto out;
+ sid = task_session(p);
+ if (!sid)
+ goto out;
+
+ retval = security_task_getsid(p);
+ if (retval)
+ goto out;
}
+ retval = pid_vnr(sid);
+out:
+ rcu_read_unlock();
+ return retval;
}
asmlinkage long sys_setsid(void)