ubifs: Reject unsupported ioctl flags explicitly

[mirror_ubuntu-bionic-kernel.git] / fs / binfmt_flat.c

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 5d6b94475f272629dc3f8c252749aff08790766d..78b5bac82559688d0f81c0a8549ea3622e832255 100644 (file)
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -856,9 +856,14 @@ err:
 
 static int load_flat_shared_library(int id, struct lib_info *libs)
 {
+       /*
+        * This is a fake bprm struct; only the members "buf", "file" and
+        * "filename" are actually used.
+        */
        struct linux_binprm bprm;
        int res;
        char buf[16];
+       loff_t pos = 0;
 
        memset(&bprm, 0, sizeof(bprm));
 
@@ -872,25 +877,11 @@ static int load_flat_shared_library(int id, struct lib_info *libs)
        if (IS_ERR(bprm.file))
                return res;
 
-       bprm.cred = prepare_exec_creds();
-       res = -ENOMEM;
-       if (!bprm.cred)
-               goto out;
-
-       /* We don't really care about recalculating credentials at this point
-        * as we're past the point of no return and are dealing with shared
-        * libraries.
-        */
-       bprm.called_set_creds = 1;
+       res = kernel_read(bprm.file, bprm.buf, BINPRM_BUF_SIZE, &pos);
 
-       res = prepare_binprm(&bprm);
-
-       if (!res)
+       if (res >= 0)
                res = load_flat_file(&bprm, libs, id, NULL);
 
-       abort_creds(bprm.cred);
-
-out:
        allow_write_access(bprm.file);
        fput(bprm.file);