Re: [syzbot] [PATCH net] nfc: nci: Fix uninit-value in nci_rx_work

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Subject: [PATCH net] nfc: nci: Fix uninit-value in nci_rx_work
Author: ryasuoka@xxxxxxxxxx

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 58c806d867bf265c6fd16fc3bc62e2d3c156b5c9 


diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 0d26c8ec9993..b7a020484131 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -1516,7 +1516,7 @@ static void nci_rx_work(struct work_struct *work)
                nfc_send_to_raw_sock(ndev->nfc_dev, skb,
                                     RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);

-               if (!nci_plen(skb->data)) {
+               if (!skb->len || !nci_plen(skb->data)) {
                        kfree_skb(skb);
                        break;
                }