linux-kernel - Re: [syzbot] [bluetooth?] general protection fault in btintel_read

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Message-ID: <tencent_891761177606DD73662373096203B5C44305@qq.com>
Date: Wed, 17 Jan 2024 21:37:24 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+830d9e3fa61968246abd@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] general protection fault in btintel_read_version

please test null ptr deref in btintel_read_version

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 943b9f0ab2cf

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index cdc5c08824a0..e5b043d96207 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -435,7 +435,7 @@ int btintel_read_version(struct hci_dev *hdev, struct intel_version *ver)
 	struct sk_buff *skb;
 
 	skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT);
-	if (IS_ERR(skb)) {
+	if (IS_ERR_OR_NULL(skb)) {
 		bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
 			   PTR_ERR(skb));
 		return PTR_ERR(skb);