Patch "Bluetooth: Fix memory leak in hci_req_sync_complete()" has been added to the 5.4-stable tree

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This is a note to let you know that I've just added the patch titled

    Bluetooth: Fix memory leak in hci_req_sync_complete()

to the 5.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     bluetooth-fix-memory-leak-in-hci_req_sync_complete.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 45d355a926ab40f3ae7bc0b0a00cb0e3e8a5a810 Mon Sep 17 00:00:00 2001
From: Dmitry Antipov <dmantipov@xxxxxxxxx>
Date: Tue, 2 Apr 2024 14:32:05 +0300
Subject: Bluetooth: Fix memory leak in hci_req_sync_complete()

From: Dmitry Antipov <dmantipov@xxxxxxxxx>

commit 45d355a926ab40f3ae7bc0b0a00cb0e3e8a5a810 upstream.

In 'hci_req_sync_complete()', always free the previous sync
request state before assigning reference to a new one.

Reported-by: syzbot+39ec16ff6cc18b1d066d@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://syzkaller.appspot.com/bug?extid=39ec16ff6cc18b1d066d
Cc: stable@xxxxxxxxxxxxxxx
Fixes: f60cb30579d3 ("Bluetooth: Convert hci_req_sync family of function to new request API")
Signed-off-by: Dmitry Antipov <dmantipov@xxxxxxxxx>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/bluetooth/hci_request.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -107,8 +107,10 @@ static void hci_req_sync_complete(struct
 	if (hdev->req_status == HCI_REQ_PEND) {
 		hdev->req_result = result;
 		hdev->req_status = HCI_REQ_DONE;
-		if (skb)
+		if (skb) {
+			kfree_skb(hdev->req_skb);
 			hdev->req_skb = skb_get(skb);
+		}
 		wake_up_interruptible(&hdev->req_wait_q);
 	}
 }


Patches currently in stable-queue which might be from dmantipov@xxxxxxxxx are

queue-5.4/bluetooth-fix-memory-leak-in-hci_req_sync_complete.patch




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