From cedc9f8f2638013dac581bf9f00a4a739d381590 Mon Sep 17 00:00:00 2001
From: John Sperbeck <jsperbeck@google.com>
Date: Sun, 17 Mar 2024 15:15:22 -0700
Subject: [PATCH] init: open /initrd.image with O_LARGEFILE

[ Upstream commit 4624b346cf67400ef46a31771011fb798dd2f999 ]

If initrd data is larger than 2Gb, we'll eventually fail to write to the
/initrd.image file when we hit that limit, unless O_LARGEFILE is set.

Link: https://lkml.kernel.org/r/20240317221522.896040-1-jsperbeck@google.com
Signed-off-by: John Sperbeck <jsperbeck@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 9f0dcca773117f0b240d1db97db27f0b8aac106a)
[Vegard: fix conflicts due to missing various initramfs refactoring commits]
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
---
 init/initramfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/init/initramfs.c b/init/initramfs.c
index 5ea7f1b5ec44..33fdbdc19ad7 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -650,7 +650,7 @@ static int __init populate_rootfs(void)
 		printk(KERN_INFO "rootfs image is not initramfs (%s)"
 				"; looks like an initrd\n", err);
 		fd = sys_open("/initrd.image",
-			      O_WRONLY|O_CREAT, 0700);
+			      O_WRONLY|O_CREAT|O_LARGEFILE, 0700);
 		if (fd >= 0) {
 			ssize_t written = xwrite(fd, (char *)initrd_start,
 						initrd_end - initrd_start);