diff options
Diffstat (limited to 'super-ddf.c')
-rw-r--r-- | super-ddf.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/super-ddf.c b/super-ddf.c index 1e43ca26..8957c2e3 100644 --- a/super-ddf.c +++ b/super-ddf.c @@ -4914,10 +4914,16 @@ static int ddf_prepare_update(struct supertype *st, * If a malloc is needed, do it here. */ struct ddf_super *ddf = st->sb; - be32 *magic = (be32 *)update->buf; + be32 *magic; + if (update->len < 4) + return 0; + magic = (be32 *)update->buf; if (be32_eq(*magic, DDF_VD_CONF_MAGIC)) { struct vcl *vcl; - struct vd_config *conf = (struct vd_config *) update->buf; + struct vd_config *conf; + if (update->len < (int)sizeof(*conf)) + return 0; + conf = (struct vd_config *) update->buf; if (posix_memalign(&update->space, 512, offsetof(struct vcl, conf) + ddf->conf_rec_len * 512) != 0) { |