diff options
| -rw-r--r-- | kernel/sys.c | 33 |
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) |