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These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / sound / core / control.c
diff --git a/kernel/sound/core/control.c b/kernel/sound/core/control.c
index 196a6fe..a85d455 100644 (file)
--- a/kernel/sound/core/control.c
+++ b/kernel/sound/core/control.c
@@ -1405,6 +1405,8 @@ static int snd_ctl_tlv_ioctl(struct snd_ctl_file *file,
                return -EFAULT;
        if (tlv.length < sizeof(unsigned int) * 2)
                return -EINVAL;
+       if (!tlv.numid)
+               return -EINVAL;
        down_read(&card->controls_rwsem);
        kctl = snd_ctl_find_numid(card, tlv.numid);
        if (kctl == NULL) {