bcachefs: set disk state should check new_state

A new device state that is not a valid state should return -EINVAL
in the disk set state ioctl.

Signed-off-by: Dan Robertson <dan@dlrobertson.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/chardev.c b/fs/bcachefs/chardev.c
index c1d8143b3fd8556ceff5d187a44378cfd1ae5e71..aae9a2db8b0dce4143f5e1c51d3458cc6ac0bf95 100644 (file)
--- a/fs/bcachefs/chardev.c
+++ b/fs/bcachefs/chardev.c
@@ -275,7 +275,8 @@ static long bch2_ioctl_disk_set_state(struct bch_fs *c,
                           BCH_FORCE_IF_METADATA_LOST|
                           BCH_FORCE_IF_DEGRADED|
                           BCH_BY_INDEX)) ||
-           arg.pad[0] || arg.pad[1] || arg.pad[2])
+           arg.pad[0] || arg.pad[1] || arg.pad[2] ||
+           arg.new_state >= BCH_MEMBER_STATE_NR)
                return -EINVAL;
 
        ca = bch2_device_lookup(c, arg.dev, arg.flags);