linux-kernel - [PATCH AUTOSEL 4.18 21/65] riscv: Do not overwrite initrd_start and initrd

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

Message-ID: <20181001003754.146961-21-alexander.levin@microsoft.com>
Date:   Mon, 1 Oct 2018 00:38:15 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Guenter Roeck <linux@...ck-us.net>,
        Palmer Dabbelt <palmer@...ive.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 21/65] riscv: Do not overwrite initrd_start and
 initrd_end

From: Guenter Roeck <linux@...ck-us.net>

[ Upstream commit e866d3e84eb7c9588afb77604d417e8cc49fe216 ]

setup_initrd() overwrites initrd_start and initrd_end if __initramfs_size
is larger than 0, which is always true even if there is no embedded
initramfs. This prevents booting qemu with "-initrd" parameter.
Overwriting initrd_start and initrd_end is not necessary since
__initramfs_start and __initramfs_size are used directly in
populate_rootfs() to load the built-in initramfs, so just drop
that code.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 arch/riscv/kernel/setup.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index f0d2070866d4..0efa5b29d0a3 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -64,15 +64,8 @@ atomic_t hart_lottery;
 #ifdef CONFIG_BLK_DEV_INITRD
 static void __init setup_initrd(void)
 {
-	extern char __initramfs_start[];
-	extern unsigned long __initramfs_size;
 	unsigned long size;
 
-	if (__initramfs_size > 0) {
-		initrd_start = (unsigned long)(&__initramfs_start);
-		initrd_end = initrd_start + __initramfs_size;
-	}
-
 	if (initrd_start >= initrd_end) {
 		printk(KERN_INFO "initrd not found or empty");
 		goto disable;
-- 
2.17.1