diff options
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index cba193ceda0..50c99264377 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1193,6 +1193,40 @@ kill_proc_info(int sig, struct siginfo *info, pid_t pid) return error; } +/* like kill_proc_info(), but doesn't use uid/euid of "current" */ +int kill_proc_info_as_uid(int sig, struct siginfo *info, pid_t pid, + uid_t uid, uid_t euid) +{ + int ret = -EINVAL; + struct task_struct *p; + + if (!valid_signal(sig)) + return ret; + + read_lock(&tasklist_lock); + p = find_task_by_pid(pid); + if (!p) { + ret = -ESRCH; + goto out_unlock; + } + if ((!info || ((unsigned long)info != 1 && + (unsigned long)info != 2 && SI_FROMUSER(info))) + && (euid != p->suid) && (euid != p->uid) + && (uid != p->suid) && (uid != p->uid)) { + ret = -EPERM; + goto out_unlock; + } + if (sig && p->sighand) { + unsigned long flags; + spin_lock_irqsave(&p->sighand->siglock, flags); + ret = __group_send_sig_info(sig, info, p); + spin_unlock_irqrestore(&p->sighand->siglock, flags); + } +out_unlock: + read_unlock(&tasklist_lock); + return ret; +} +EXPORT_SYMBOL_GPL(kill_proc_info_as_uid); /* * kill_something_info() interprets pid in interesting ways just like kill(2). |