linux-kernel - [PATCH 5.16 112/285] init/main.c: return 1 from handled _

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Date:   Tue, 12 Apr 2022 08:29:29 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>,
        Igor Zhbanov <i.zhbanov@...russia.ru>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 112/285] init/main.c: return 1 from handled __setup() functions

From: Randy Dunlap <rdunlap@...radead.org>

[ Upstream commit f9a40b0890658330c83c95511f9d6b396610defc ]

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.

Link: https://lkml.kernel.org/r/20220221050901.23985-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Reported-by: Igor Zhbanov <i.zhbanov@...russia.ru>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 init/main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/init/main.c b/init/main.c
index cb68bc48a682..792a8d9cc560 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1189,7 +1189,7 @@ static int __init initcall_blacklist(char *str)
 		}
 	} while (str_entry);
 
-	return 0;
+	return 1;
 }
 
 static bool __init_or_module initcall_blacklisted(initcall_t fn)
@@ -1451,7 +1451,9 @@ static noinline void __init kernel_init_freeable(void);
 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
-- 
2.35.1