From: Edward Adam Davis Date: Thu, 18 Jan 2024 04:40:34 +0000 (+0800) Subject: Bluetooth: btintel: Fix null ptr deref in btintel_read_version X-Git-Tag: v6.6.27~73 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ffdca0a62abaf8c41d8d9ea132000fd808de329b;p=thirdparty%2Fkernel%2Fstable.git Bluetooth: btintel: Fix null ptr deref in btintel_read_version [ Upstream commit b79e040910101b020931ba0c9a6b77e81ab7f645 ] If hci_cmd_sync_complete() is triggered and skb is NULL, then hdev->req_skb is NULL, which will cause this issue. Reported-and-tested-by: syzbot+830d9e3fa61968246abd@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin --- diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c index 2462796a512a5..b396b0b1d6cc2 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);