fs: add link restrictions

[~andy/linux] / fs / exec.c

diff --git a/fs/exec.c b/fs/exec.c
index a79786a8d2c88d5b6c580859ef12496f43b4b0f4..b800fb87f6ce3c1be4075d44033cb27355cd0d55 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -819,10 +819,10 @@ static int exec_mmap(struct mm_struct *mm)
        /* Notify parent that we're no longer interested in the old VM */
        tsk = current;
        old_mm = current->mm;
-       sync_mm_rss(old_mm);
        mm_release(tsk, old_mm);
 
        if (old_mm) {
+               sync_mm_rss(old_mm);
                /*
                 * Make sure that if there is a core dump in progress
                 * for the old mm, we get out and die instead of going
@@ -2069,25 +2069,18 @@ static void wait_for_dump_helpers(struct file *file)
  */
 static int umh_pipe_setup(struct subprocess_info *info, struct cred *new)
 {
-       struct file *rp, *wp;
+       struct file *files[2];
        struct fdtable *fdt;
        struct coredump_params *cp = (struct coredump_params *)info->data;
        struct files_struct *cf = current->files;
+       int err = create_pipe_files(files, 0);
+       if (err)
+               return err;
 
-       wp = create_write_pipe(0);
-       if (IS_ERR(wp))
-               return PTR_ERR(wp);
-
-       rp = create_read_pipe(wp, 0);
-       if (IS_ERR(rp)) {
-               free_write_pipe(wp);
-               return PTR_ERR(rp);
-       }
-
-       cp->file = wp;
+       cp->file = files[1];
 
        sys_close(0);
-       fd_install(0, rp);
+       fd_install(0, files[0]);
        spin_lock(&cf->file_lock);
        fdt = files_fdtable(cf);
        __set_open_fd(0, fdt);