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ovl: fsync after copy-up

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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@redhat.com>
Cc: <stable@vger.kernel.org>
This commit is contained in:
Miklos Szeredi 2016-10-31 14:42:14 +01:00
parent b93d4a0eb3
commit 641089c154
1 changed files with 2 additions and 0 deletions
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2
fs/overlayfs/copy_up.c
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@ -178,6 +178,8 @@ static int ovl_copy_up_data(struct path *old, struct path *new, loff_t len)
len -= bytes;
}
if (!error)
error = vfs_fsync(new_file, 0);
fput(new_file);
out_fput:
fput(old_file);