This is a note to let you know that I've just added the patch titled
ovl: fsync after copy-up
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ovl-fsync-after-copy-up.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 641089c1549d8d3df0b047b5de7e9a111362cdce Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Date: Mon, 31 Oct 2016 14:42:14 +0100
Subject: ovl: fsync after copy-up
From: Miklos Szeredi <mszeredi@xxxxxxxxxx>
commit 641089c1549d8d3df0b047b5de7e9a111362cdce upstream.
Make sure the copied up file hits the disk before renaming to the final
destination. If this is not done then the copy-up may corrupt the data in
the file in case of a crash.
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/overlayfs/copy_up.c | 2 ++
1 file changed, 2 insertions(+)
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -139,6 +139,8 @@ static int ovl_copy_up_data(struct path
len -= bytes;
}
+ if (!error)
+ error = vfs_fsync(new_file, 0);
fput(new_file);
out_fput:
fput(old_file);
Patches currently in stable-queue which might be from mszeredi@xxxxxxxxxx are
queue-4.4/ovl-fsync-after-copy-up.patch
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