linux-kernel - [PATCH net] nfc: nci: Fix handling of zero-length payload packets in nci_rx

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Message-ID: <20240515151757.457353-1-ryasuoka@redhat.com>
Date: Thu, 16 May 2024 00:17:07 +0900
From: Ryosuke Yasuoka <ryasuoka@...hat.com>
To: krzk@...nel.org,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: Ryosuke Yasuoka <ryasuoka@...hat.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	syoshida@...hat.com
Subject: [PATCH net] nfc: nci: Fix handling of zero-length payload packets in nci_rx_work()

When nci_rx_work() receives a zero-length payload packet, it should
discard the packet without exiting the loop. Instead, it should continue
processing subsequent packets.

Fixes: d24b03535e5e ("nfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet")
Closes: https://lore.kernel.org/lkml/20240428134525.GW516117@kernel.org/T/
Reported-by: Ryosuke Yasuoka <ryasuoka@...hat.com>
Signed-off-by: Ryosuke Yasuoka <ryasuoka@...hat.com>
---
 net/nfc/nci/core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index b133dc55304c..f2ae8b0d81b9 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -1518,8 +1518,7 @@ static void nci_rx_work(struct work_struct *work)
 
 		if (!nci_plen(skb->data)) {
 			kfree_skb(skb);
-			kcov_remote_stop();
-			break;
+			continue;
 		}
 
 		/* Process frame */
-- 
2.44.0