Commit e21a6c57 authored by Amir Goldstein's avatar Amir Goldstein Committed by Miklos Szeredi
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ovl: check that upperdir path is not on a read-only mount 



So far we only checked that sb is not read-only.

Suggested-by: default avatarChristian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: default avatarAmir Goldstein <amir73il@gmail.com>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 1f0cb8bc

fs/overlayfs/super.c

+2 −2
Original line number Diff line number Diff line
@@ -1185,8 +1185,8 @@ static int ovl_get_upper(struct super_block *sb, struct ovl_fs *ofs, 
	if (err)

		goto out;



	/* Upper fs should not be r/o */

	if (sb_rdonly(upperpath->mnt->mnt_sb)) {

	/* Upperdir path should not be r/o */

	if (__mnt_is_readonly(upperpath->mnt)) {

		pr_err("upper fs is r/o, try multi-lower layers mount\n");

		err = -EINVAL;

		goto out;