efi/libstub: Stop parsing arguments at "--"

commit 1fd9717d75df68e3c3509b8e7b1138ca63472f88 upstream.

Arguments after "--" are arguments for init, not for the kernel.

Cc: <stable@vger.kernel.org>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200725155916.1376773-1-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index 9f34c72429397de01e65a4f4fd081775b05b883b..581367482d2e11788e9b9312596e2314b56df56d 100644 (file)
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -87,6 +87,8 @@ efi_status_t efi_parse_options(char const *cmdline)
                char *param, *val;
 
                str = next_arg(str, &param, &val);
+               if (!val && !strcmp(param, "--"))
+                       break;
 
                if (!strcmp(param, "nokaslr")) {
                        efi_nokaslr = true;