linux-kernel - [PATCH v6] LoongArch: Fix CONFIG_CMDLINE_EXTEND and CONFIG_CMDLINE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <MEYP282MB2597CE76DFC2B421C1A4594CD93EA@MEYP282MB2597.AUSP282.PROD.OUTLOOK.COM>
Date:   Thu, 20 Jul 2023 19:43:10 +0800
From:   Dong Zhihong <donmor3000@...mail.com>
To:     chenhuacai@...nel.org, kernel@...0n.name
Cc:     ardb@...nel.org, tangyouling@...ngson.cn, zhoubinbin@...ngson.cn,
        yangtiezhu@...ngson.cn, donmor3000@...mail.com, tglx@...utronix.de,
        loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH v6] LoongArch: Fix CONFIG_CMDLINE_EXTEND and CONFIG_CMDLINE_BOOTLOADER on non-FDT systems

On FDT systems these command line processing are already taken care of
by early_init_dt_scan_chosen(). Add similar handling to the non-FDT
code path to allow these config options to work for non-FDT boxes too.

Signed-off-by: Dong Zhihong <donmor3000@...mail.com>
---
v5 -> v6: Update commit message (Xuerui)
v4 -> v5: Update commit message and adjust the code logic (Huacai)
v3 -> v4: Make CONFIG_CMDLINE appended to the end of command line (Huacai);
	Removed unnecessary #ifdef since CONFIG_CMDLINE is always a string on
	LoongArch
	Reworded comments
	Reworded the subject of commit message (Huacai)
v2 -> v3: Reworded the commit message again to make it imperative (Ruoyao)
v1 -> v2: Reworded the commit message so it's more imperative (Markus);
	Added `goto out` to FDT part (Huacai)

 arch/loongarch/kernel/setup.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c
index 78a00359bde3..49cb8e06f9e5 100644
--- a/arch/loongarch/kernel/setup.c
+++ b/arch/loongarch/kernel/setup.c
@@ -332,9 +332,25 @@ static void __init bootcmdline_init(char **cmdline_p)
 			strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
 
 		strlcat(boot_command_line, init_command_line, COMMAND_LINE_SIZE);
+		goto out;
 	}
 #endif
 
+	/*
+	 * Append built-in command to the retrieved one if
+	 * CONFIG_CMDLINE_EXTEND is enabled.
+	 */
+	if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) && CONFIG_CMDLINE[0]) {
+		strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
+		strlcat(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+	}
+
+	/*
+	 * Use built-in command line if nothing is retrieved from boot loader.
+	 */
+	if (IS_ENABLED(CONFIG_CMDLINE_BOOTLOADER) && !boot_command_line[0])
+		strscpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+
 out:
 	*cmdline_p = boot_command_line;
 }
-- 
2.25.1