generic compat_sys_rt_sigqueueinfo()
conditional on GENERIC_COMPAT_RT_SIGQUEUEINFO; by the end of that series
it will become the same thing as COMPAT and conditional will die out.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/kernel/signal.c b/kernel/signal.c
index 3040c34..6cd3023 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2983,6 +2983,22 @@
return do_tkill(0, pid, sig);
}
+static int do_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t *info)
+{
+ /* Not even root can pretend to send signals from the kernel.
+ * Nor can they impersonate a kill()/tgkill(), which adds source info.
+ */
+ if (info->si_code >= 0 || info->si_code == SI_TKILL) {
+ /* We used to allow any < 0 si_code */
+ WARN_ON_ONCE(info->si_code < 0);
+ return -EPERM;
+ }
+ info->si_signo = sig;
+
+ /* POSIX.1b doesn't mention process groups. */
+ return kill_proc_info(sig, info, pid);
+}
+
/**
* sys_rt_sigqueueinfo - send signal information to a signal
* @pid: the PID of the thread
@@ -2993,24 +3009,27 @@
siginfo_t __user *, uinfo)
{
siginfo_t info;
-
if (copy_from_user(&info, uinfo, sizeof(siginfo_t)))
return -EFAULT;
-
- /* Not even root can pretend to send signals from the kernel.
- * Nor can they impersonate a kill()/tgkill(), which adds source info.
- */
- if (info.si_code >= 0 || info.si_code == SI_TKILL) {
- /* We used to allow any < 0 si_code */
- WARN_ON_ONCE(info.si_code < 0);
- return -EPERM;
- }
- info.si_signo = sig;
-
- /* POSIX.1b doesn't mention process groups. */
- return kill_proc_info(sig, &info, pid);
+ return do_rt_sigqueueinfo(pid, sig, &info);
}
+#ifdef CONFIG_COMPAT
+#ifdef CONFIG_GENERIC_COMPAT_RT_SIGQUEUEINFO
+COMPAT_SYSCALL_DEFINE3(rt_sigqueueinfo,
+ compat_pid_t, pid,
+ int, sig,
+ struct compat_siginfo __user *, uinfo)
+{
+ siginfo_t info;
+ int ret = copy_siginfo_from_user32(&info, uinfo);
+ if (unlikely(ret))
+ return ret;
+ return do_rt_sigqueueinfo(pid, sig, &info);
+}
+#endif
+#endif
+
long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info)
{
/* This is only valid for single tasks */