Merging upstream version 6.9.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 27 insertions, 13 deletions

diff --git a/net/nfc/core.c b/net/nfc/core.c
index eb2c0959e5..e58dc64050 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -1015,7 +1015,7 @@ static void nfc_check_pres_timeout(struct timer_list *t)
 	schedule_work(&dev->check_pres_work);
 }
 
-struct class nfc_class = {
+const struct class nfc_class = {
 	.name = "nfc",
 	.dev_release = nfc_release,
 };
diff --git a/net/nfc/hci/llc.c b/net/nfc/hci/llc.c
index 2140f67246..ba91284f40 100644
--- a/net/nfc/hci/llc.c
+++ b/net/nfc/hci/llc.c
@@ -30,15 +30,19 @@ exit:
 	return r;
 }
 
+static void nfc_llc_del_engine(struct nfc_llc_engine *llc_engine)
+{
+	list_del(&llc_engine->entry);
+	kfree_const(llc_engine->name);
+	kfree(llc_engine);
+}
+
 void nfc_llc_exit(void)
 {
 	struct nfc_llc_engine *llc_engine, *n;
 
-	list_for_each_entry_safe(llc_engine, n, &llc_engines, entry) {
-		list_del(&llc_engine->entry);
-		kfree(llc_engine->name);
-		kfree(llc_engine);
-	}
+	list_for_each_entry_safe(llc_engine, n, &llc_engines, entry)
+		nfc_llc_del_engine(llc_engine);
 }
 
 int nfc_llc_register(const char *name, const struct nfc_llc_ops *ops)
@@ -49,7 +53,7 @@ int nfc_llc_register(const char *name, const struct nfc_llc_ops *ops)
 	if (llc_engine == NULL)
 		return -ENOMEM;
 
-	llc_engine->name = kstrdup(name, GFP_KERNEL);
+	llc_engine->name = kstrdup_const(name, GFP_KERNEL);
 	if (llc_engine->name == NULL) {
 		kfree(llc_engine);
 		return -ENOMEM;
@@ -82,9 +86,7 @@ void nfc_llc_unregister(const char *name)
 	if (llc_engine == NULL)
 		return;
 
-	list_del(&llc_engine->entry);
-	kfree(llc_engine->name);
-	kfree(llc_engine);
+	nfc_llc_del_engine(llc_engine);
 }
 
 struct nfc_llc *nfc_llc_allocate(const char *name, struct nfc_hci_dev *hdev,
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index b133dc5530..f456a5911e 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -1463,6 +1463,19 @@ int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
 				 ndev->ops->n_core_ops);
 }
 
+static bool nci_valid_size(struct sk_buff *skb)
+{
+	BUILD_BUG_ON(NCI_CTRL_HDR_SIZE != NCI_DATA_HDR_SIZE);
+	unsigned int hdr_size = NCI_CTRL_HDR_SIZE;
+
+	if (skb->len < hdr_size ||
+	    !nci_plen(skb->data) ||
+	    skb->len < hdr_size + nci_plen(skb->data)) {
+		return false;
+	}
+	return true;
+}
+
 /* ---- NCI TX Data worker thread ---- */
 
 static void nci_tx_work(struct work_struct *work)
@@ -1516,10 +1529,9 @@ 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 (!nci_valid_size(skb)) {
 			kfree_skb(skb);
-			kcov_remote_stop();
-			break;
+			continue;
 		}
 
 		/* Process frame */