x86/kaslr: Remove bogus warning and unnecessary goto

Drop the warning on seeing "--" in handle_mem_options(). This will trigger
whenever one of the memory options is present in the command line
together with "--", but there's no problem if that is the case.

Replace goto with break.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200727230801.3468620-3-nivedita@alum.mit.edu

diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index e0f69f3..c31f3a5 100644 (file)
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -295,10 +295,8 @@ static void handle_mem_options(void)
        while (*args) {
                args = next_arg(args, &param, &val);
                /* Stop at -- */
-               if (!val && strcmp(param, "--") == 0) {
-                       warn("Only '--' specified in cmdline");
-                       goto out;
-               }
+               if (!val && strcmp(param, "--") == 0)
+                       break;
 
                if (!strcmp(param, "memmap")) {
                        mem_avoid_memmap(PARSE_MEMMAP, val);
@@ -311,7 +309,7 @@ static void handle_mem_options(void)
                                continue;
                        mem_size = memparse(p, &p);
                        if (mem_size == 0)
-                               goto out;
+                               break;
 
                        mem_limit = mem_size;
                } else if (!strcmp(param, "efi_fake_mem")) {
@@ -319,7 +317,6 @@ static void handle_mem_options(void)
                }
        }
 
-out:
        free(tmp_cmdline);
        return;
 }