The patch titled
Subject: init: open output files from cpio unpacking with O_LARGEFILE
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
init-open-output-files-from-cpio-unpacking-with-o_largefile.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/init-open-output-files-from-cpio-unpacking-with-o_largefile.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: John Sperbeck <jsperbeck@xxxxxxxxxx>
Subject: init: open output files from cpio unpacking with O_LARGEFILE
Date: Sat, 23 Mar 2024 08:29:34 -0700
If a member of a cpio archive for an initrd or initrams is larger than
2Gb, we'll eventually fail to write to that file when we get to that
limit, unless O_LARGEFILE is set.
The problem can be seen with this recipe, assuming that BLK_DEV_RAM
is not configured:
cd /tmp
dd if=/dev/zero of=BIGFILE bs=1048576 count=2200
echo BIGFILE | cpio -o -H newc -R root:root > initrd.img
kexec -l /boot/vmlinuz-$(uname -r) --initrd=initrd.img --reuse-cmdline
kexec -e
The console will show 'Initramfs unpacking failed: write error'. With
the patch, the error is gone.
Link: https://lkml.kernel.org/r/20240323152934.3307391-1-jsperbeck@xxxxxxxxxx
Signed-off-by: John Sperbeck <jsperbeck@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
init/initramfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/init/initramfs.c~init-open-output-files-from-cpio-unpacking-with-o_largefile
+++ a/init/initramfs.c
@@ -367,7 +367,7 @@ static int __init do_name(void)
if (S_ISREG(mode)) {
int ml = maybe_link();
if (ml >= 0) {
- int openflags = O_WRONLY|O_CREAT;
+ int openflags = O_WRONLY|O_CREAT|O_LARGEFILE;
if (ml != 1)
openflags |= O_TRUNC;
wfile = filp_open(collected, openflags, mode);
_
Patches currently in -mm which might be from jsperbeck@xxxxxxxxxx are
init-open-output-files-from-cpio-unpacking-with-o_largefile.patch
