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[v2] Bluetooth: Devcoredump: Fix storing u32 without specifying byte order issue

Message ID 1681724399-28292-1-git-send-email-quic_zijuhu@quicinc.com
State Accepted
Commit 0ab905c3be8c2be368821dd2bd1f8d126064d993
Headers show
Series [v2] Bluetooth: Devcoredump: Fix storing u32 without specifying byte order issue | expand

Commit Message

Zijun Hu April 17, 2023, 9:39 a.m. UTC 
API hci_devcd_init() stores its u32 type parameter @dump_size into
skb, but it does not specify which byte order is used to store the
integer, let us take little endian to store and parse the integer.

Fixes: f5cc609d09d4 ("Bluetooth: Add support for hci devcoredump")
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
---
 net/bluetooth/coredump.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/net/bluetooth/coredump.c b/net/bluetooth/coredump.c
index 08fa98505454..d2d2624ec708 100644
--- a/net/bluetooth/coredump.c
+++ b/net/bluetooth/coredump.c
@@ -5,6 +5,7 @@ 
 
 #include <linux/devcoredump.h>
 
+#include <asm/unaligned.h>
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 
@@ -180,25 +181,25 @@  static int hci_devcd_prepare(struct hci_dev *hdev, u32 dump_size)
 
 static void hci_devcd_handle_pkt_init(struct hci_dev *hdev, struct sk_buff *skb)
 {
-	u32 *dump_size;
+	u32 dump_size;
 
 	if (hdev->dump.state != HCI_DEVCOREDUMP_IDLE) {
 		DBG_UNEXPECTED_STATE();
 		return;
 	}
 
-	if (skb->len != sizeof(*dump_size)) {
+	if (skb->len != sizeof(dump_size)) {
 		bt_dev_dbg(hdev, "Invalid dump init pkt");
 		return;
 	}
 
-	dump_size = skb_pull_data(skb, sizeof(*dump_size));
-	if (!*dump_size) {
+	dump_size = get_unaligned_le32(skb_pull_data(skb, 4));
+	if (!dump_size) {
 		bt_dev_err(hdev, "Zero size dump init pkt");
 		return;
 	}
 
-	if (hci_devcd_prepare(hdev, *dump_size)) {
+	if (hci_devcd_prepare(hdev, dump_size)) {
 		bt_dev_err(hdev, "Failed to prepare for dump");
 		return;
 	}
@@ -441,7 +442,7 @@  int hci_devcd_init(struct hci_dev *hdev, u32 dump_size)
 		return -ENOMEM;
 
 	hci_dmp_cb(skb)->pkt_type = HCI_DEVCOREDUMP_PKT_INIT;
-	skb_put_data(skb, &dump_size, sizeof(dump_size));
+	put_unaligned_le32(dump_size, skb_put(skb, 4));
 
 	skb_queue_tail(&hdev->dump.dump_q, skb);
 	queue_work(hdev->workqueue, &hdev->dump.dump_rx);