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Date: Mon, 18 Mar 2024 19:18:44 -0700
From: syzbot <syzbot+29b5ca705d2e0f4a44d2@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] [PATCH net v2] nfc: nci: Fix uninit-value in nci_dev_up
For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org.
***
Subject: [PATCH net v2] nfc: nci: Fix uninit-value in nci_dev_up
Author: ryasuoka@...hat.com
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 610a9b8f49fbcf1100716370d3b5f6f884a2835a
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 6c9592d05120..f471fc54c6a1 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -1512,6 +1512,11 @@ 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)) {
+ kfree_skb(skb);
+ break;
+ }
+
/* Process frame */
switch (nci_mt(skb->data)) {
case NCI_MT_RSP_PKT:
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