提交 83beaf3c 编写于 作者: O Oleg Nesterov 提交者: Linus Torvalds

pids: sys_setpgid: use change_pid() helper

Use change_pid() instead of detach_pid() + attach_pid() in sys_setpgid().

This way task_pgrp() is not NULL in between.
Signed-off-by: NOleg Nesterov <oleg@tv-sign.ru>
Cc:  "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 24336eae
...@@ -978,8 +978,7 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid) ...@@ -978,8 +978,7 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
goto out; goto out;
if (task_pgrp(p) != pgrp) { if (task_pgrp(p) != pgrp) {
detach_pid(p, PIDTYPE_PGID); change_pid(p, PIDTYPE_PGID, pgrp);
attach_pid(p, PIDTYPE_PGID, pgrp);
set_task_pgrp(p, pid_nr(pgrp)); set_task_pgrp(p, pid_nr(pgrp));
} }
......
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