1 files changed, 17 insertions, 2 deletions

diff --git a/fs/signalfd.c b/fs/signalfd.c
index 619725644c75..9c39bc7f8431 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -205,11 +205,19 @@ static const struct file_operations signalfd_fops = {
         .read           = signalfd_read,
 };
 
-asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemask)
+asmlinkage long sys_signalfd4(int ufd, sigset_t __user *user_mask,
+                              size_t sizemask, int flags)
 {
         sigset_t sigmask;
         struct signalfd_ctx *ctx;
 
+        /* Check the SFD_* constants for consistency.  */
+        BUILD_BUG_ON(SFD_CLOEXEC != O_CLOEXEC);
+        BUILD_BUG_ON(SFD_NONBLOCK != O_NONBLOCK);
+
+        if (flags & ~(SFD_CLOEXEC | SFD_NONBLOCK))
+                return -EINVAL;
+
         if (sizemask != sizeof(sigset_t) ||
             copy_from_user(&sigmask, user_mask, sizeof(sigmask)))
                 return -EINVAL;
@@ -227,7 +235,8 @@ asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemas
                  * When we call this, the initialization must be complete, since
                  * anon_inode_getfd() will install the fd.
                  */
-                ufd = anon_inode_getfd("[signalfd]", &signalfd_fops, ctx);
+                ufd = anon_inode_getfd("[signalfd]", &signalfd_fops, ctx,
+                                       flags & (O_CLOEXEC | O_NONBLOCK));
                 if (ufd < 0)
                         kfree(ctx);
         } else {
@@ -249,3 +258,9 @@ asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemas
 
         return ufd;
 }
+
+asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask,
+                             size_t sizemask)
+{
+        return sys_signalfd4(ufd, user_mask, sizemask, 0);
+}