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authorAl Viro <viro@zeniv.linux.org.uk>2017-05-31 04:46:17 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2017-06-09 23:57:12 -0400
commit1b3c872c8342803d0fcd8042e4e007d173191db6 (patch)
tree3deaa93558a8ec380e4091d2b8061462f4dab887 /kernel/signal.c
parent464d62421cb8b2a6812dcb8c45184ff17b1bc5da (diff)
downloadlinux-1b3c872c8342803d0fcd8042e4e007d173191db6.tar.bz2
rt_sigtimedwait(): move compat to native
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c36
1 files changed, 35 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 6237f492adfc..fe5b3608c31c 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2768,7 +2768,7 @@ int copy_siginfo_to_user(siginfo_t __user *to, const siginfo_t *from)
* @info: if non-null, the signal's siginfo is returned here
* @ts: upper bound on process time suspension
*/
-int do_sigtimedwait(const sigset_t *which, siginfo_t *info,
+static int do_sigtimedwait(const sigset_t *which, siginfo_t *info,
const struct timespec *ts)
{
ktime_t *to = NULL, timeout = KTIME_MAX;
@@ -2857,6 +2857,40 @@ SYSCALL_DEFINE4(rt_sigtimedwait, const sigset_t __user *, uthese,
return ret;
}
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese,
+ struct compat_siginfo __user *, uinfo,
+ struct compat_timespec __user *, uts, compat_size_t, sigsetsize)
+{
+ compat_sigset_t s32;
+ sigset_t s;
+ struct timespec t;
+ siginfo_t info;
+ long ret;
+
+ if (sigsetsize != sizeof(sigset_t))
+ return -EINVAL;
+
+ if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
+ return -EFAULT;
+ sigset_from_compat(&s, &s32);
+
+ if (uts) {
+ if (compat_get_timespec(&t, uts))
+ return -EFAULT;
+ }
+
+ ret = do_sigtimedwait(&s, &info, uts ? &t : NULL);
+
+ if (ret > 0 && uinfo) {
+ if (copy_siginfo_to_user32(uinfo, &info))
+ ret = -EFAULT;
+ }
+
+ return ret;
+}
+#endif
+
/**
* sys_kill - send a signal to a process
* @pid: the PID of the process