[PATCH 2/2] init/main.c: return 1 from handled __setup() functions

[Randy Dunlap]

initcall_blacklist() should return 1 to indicate that it handled its
cmdline arguments.

set_debug_rodata() should return 1 to indicate that it handled its
cmdline arguments. Print a warning if the option string is invalid.

This prevents these strings from being added to the 'init' program's
environment as they are not init arguments/parameters.

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: Igor Zhbanov <i.zhbanov@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 init/main.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- linux-next-20220217.orig/init/main.c
+++ linux-next-20220217/init/main.c
@@ -1195,7 +1195,7 @@ static int __init initcall_blacklist(cha
 		}
 	} while (str_entry);
 
-	return 0;
+	return 1;
 }
 
 static bool __init_or_module initcall_blacklisted(initcall_t fn)
@@ -1455,7 +1455,9 @@ static noinline void __init kernel_init_
 bool rodata_enabled __ro_after_init = true;
 static int __init set_debug_rodata(char *str)
 {
-	return strtobool(str, &rodata_enabled);
+	if (strtobool(str, &rodata_enabled))
+		pr_warn("Invalid option string for rodata: '%s'\n", str);
+	return 1;
 }
 __setup("rodata=", set_debug_rodata);
 #endif