From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9BFBC47071 for ; Thu, 16 Nov 2023 18:20:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345437AbjKPSUU (ORCPT ); Thu, 16 Nov 2023 13:20:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231327AbjKPSUT (ORCPT ); Thu, 16 Nov 2023 13:20:19 -0500 Received: from mail-oi1-x236.google.com (mail-oi1-x236.google.com [IPv6:2607:f8b0:4864:20::236]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7093D4D for ; Thu, 16 Nov 2023 10:20:14 -0800 (PST) Received: by mail-oi1-x236.google.com with SMTP id 5614622812f47-3b40d5ea323so697751b6e.0 for ; Thu, 16 Nov 2023 10:20:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1700158814; x=1700763614; darn=vger.kernel.org; h=mime-version:subject:user-agent:references:in-reply-to:message-id :date:cc:to:from:from:to:cc:subject:date:message-id:reply-to; bh=Qe2V3BbCb9UTSPbYfnHwAlTji1v+3NnyuczSR3mfR/0=; b=GtMT9fLCrxxjRQabEqk4jAD9Q9BYk52fdJ7DwPXxwZhMohhrJlMgE/H0uncF7gIjfQ 85z7YkHl9RJFS86KVHrAkEBzaZzvM2xTYcu3xrQp1ZyU+2t0Z87DcaZc6VEIpQP4vYiy cY+nUVr9Ljf+QfyrTz8zdp0Qj/luEOUfi497U= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700158814; x=1700763614; h=mime-version:subject:user-agent:references:in-reply-to:message-id :date:cc:to:from:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Qe2V3BbCb9UTSPbYfnHwAlTji1v+3NnyuczSR3mfR/0=; b=iMPrYJ7ZqdIWgBmw0NwuKRUiprxAvLZvALECiMUPCX5V6JnDLtJygmOmYnl/+qY9C+ SBL1zD17KaBE7TXOEVQTzgDca1WH4Ewds+GHoAnRRJUWNiJdbLFJmzIVo4oHC23Vd2s+ dm8h1pGoLvaOpuymPZtksR9e3iV11zcJ6eWMl643UUPfz85iABLxdueLzgAhJEXolGlN PRTHnewBUDKsNAXHVSJGT85RTmM5xmVyLqSzICAlfsIYZJUfNlLPo6I068jL6ccovEf2 dt+1fD4tmWyQDLpLjajgIyPQK0S2katTKAMx2LNHw1vbqOIWR2CfpuXjOFYnrxh9pg/C 7oSg== X-Gm-Message-State: AOJu0YxVfzGs3FVQATZ/u/ZC8fu9JUaaomA7+yLCqrpFKjauHzNnm5S2 s954pd6SMA4SRlADtfeCa4KvNg== X-Google-Smtp-Source: AGHT+IEk/N8I3jhB2UbSAIWAocP+igZaUkZvlRo6AdpXMF1cdSGb8qInDV/grLtjRK80656F8rn4XQ== X-Received: by 2002:a05:6358:e4a1:b0:16b:c810:667b with SMTP id by33-20020a056358e4a100b0016bc810667bmr9321225rwb.2.1700158813880; Thu, 16 Nov 2023 10:20:13 -0800 (PST) Received: from [192.168.178.38] (f215227.upc-f.chello.nl. [80.56.215.227]) by smtp.gmail.com with ESMTPSA id m9-20020ad44b69000000b00677e9c852b7sm541060qvx.108.2023.11.16.10.20.07 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 Nov 2023 10:20:11 -0800 (PST) From: Arend Van Spriel To: Zheng Hacker CC: Kalle Valo , Zheng Wang , , , , , , , , , , , , , , , Date: Thu, 16 Nov 2023 19:20:06 +0100 Message-ID: <18bd95c97f0.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com> In-Reply-To: References: <20231106141704.866455-1-zyytlz.wz@163.com> <87o7g7ueom.fsf@kernel.org> <18ba5520da0.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com> User-Agent: AquaMail/1.48.0 (build: 104800386) Subject: Re: [PATCH v5] wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000304a3d060a4912f1" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000304a3d060a4912f1 Content-Type: text/plain; format=flowed; charset="UTF-8" Content-Transfer-Encoding: 8bit On November 15, 2023 4:00:46 PM Zheng Hacker wrote: > Arend van Spriel 于2023年11月13日周一 17:18写道： >> >> On November 8, 2023 4:03:26 AM Zheng Hacker >> wrote: >> >>> Arend Van Spriel 于2023年11月6日周一 23:48写道： >>>> >>>> On November 6, 2023 3:44:53 PM Zheng Hacker wrote: >>>> >>>>> Thanks! I didn't test it for I don't have a device. Very appreciated >>>>> if anyone could help with that. >>>> >>>> I would volunteer, but it made me dig deep and not sure if there is a >>>> problem to solve here. >>>> >>>> brcmf_cfg80211_detach() calls wl_deinit_priv() -> brcmf_abort_scanning() -> >>>> brcmf_notify_escan_complete() which does delete the timer. >>>> >>>> What am I missing here? >>> >>> Thanks four your detailed review. I did see the code and not sure if >>> brcmf_notify_escan_complete >>> would be triggered for sure. So in the first version I want to delete >>> the pending timer ahead of time. >> >> Why requesting a CVE when you are not sure? Seems a bit hasty to put it >> mildly. > > I'm sure the issue exists because there's only cancler of timer but not woker. > As there's similar CVEs before like : https://github.com/V4bel/CVE-2022-41218, > I submit it as soon as I found it. Ah, yes. The cancel_work_sync() can also be done in brcmf_notify_escan_complete(). Regards, Arend --000000000000304a3d060a4912f1 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQdwYJKoZIhvcNAQcCoIIQaDCCEGQCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3OMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS MyBQZXJzb25hbFNpZ24gMiBDQSAyMDIwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA vbCmXCcsbZ/a0fRIQMBxp4gJnnyeneFYpEtNydrZZ+GeKSMdHiDgXD1UnRSIudKo+moQ6YlCOu4t rVWO/EiXfYnK7zeop26ry1RpKtogB7/O115zultAz64ydQYLe+a1e/czkALg3sgTcOOcFZTXk38e aqsXsipoX1vsNurqPtnC27TWsA7pk4uKXscFjkeUE8JZu9BDKaswZygxBOPBQBwrA5+20Wxlk6k1 e6EKaaNaNZUy30q3ArEf30ZDpXyfCtiXnupjSK8WU2cK4qsEtj09JS4+mhi0CTCrCnXAzum3tgcH cHRg0prcSzzEUDQWoFxyuqwiwhHu3sPQNmFOMwIDAQABo4IB2jCCAdYwDgYDVR0PAQH/BAQDAgGG MGAGA1UdJQRZMFcGCCsGAQUFBwMCBggrBgEFBQcDBAYKKwYBBAGCNxQCAgYKKwYBBAGCNwoDBAYJ KwYBBAGCNxUGBgorBgEEAYI3CgMMBggrBgEFBQcDBwYIKwYBBQUHAxEwEgYDVR0TAQH/BAgwBgEB /wIBADAdBgNVHQ4EFgQUljPR5lgXWzR1ioFWZNW+SN6hj88wHwYDVR0jBBgwFoAUj/BLf6guRSSu TVD6Y5qL3uLdG7wwegYIKwYBBQUHAQEEbjBsMC0GCCsGAQUFBzABhiFodHRwOi8vb2NzcC5nbG9i YWxzaWduLmNvbS9yb290cjMwOwYIKwYBBQUHMAKGL2h0dHA6Ly9zZWN1cmUuZ2xvYmFsc2lnbi5j b20vY2FjZXJ0L3Jvb3QtcjMuY3J0MDYGA1UdHwQvMC0wK6ApoCeGJWh0dHA6Ly9jcmwuZ2xvYmFs c2lnbi5jb20vcm9vdC1yMy5jcmwwWgYDVR0gBFMwUTALBgkrBgEEAaAyASgwQgYKKwYBBAGgMgEo CjA0MDIGCCsGAQUFBwIBFiZodHRwczovL3d3dy5nbG9iYWxzaWduLmNvbS9yZXBvc2l0b3J5LzAN BgkqhkiG9w0BAQsFAAOCAQEAdAXk/XCnDeAOd9nNEUvWPxblOQ/5o/q6OIeTYvoEvUUi2qHUOtbf jBGdTptFsXXe4RgjVF9b6DuizgYfy+cILmvi5hfk3Iq8MAZsgtW+A/otQsJvK2wRatLE61RbzkX8 9/OXEZ1zT7t/q2RiJqzpvV8NChxIj+P7WTtepPm9AIj0Keue+gS2qvzAZAY34ZZeRHgA7g5O4TPJ /oTd+4rgiU++wLDlcZYd/slFkaT3xg4qWDepEMjT4T1qFOQIL+ijUArYS4owpPg9NISTKa1qqKWJ jFoyms0d0GwOniIIbBvhI2MJ7BSY9MYtWVT5jJO3tsVHwj4cp92CSFuGwunFMzCCA18wggJHoAMC AQICCwQAAAAAASFYUwiiMA0GCSqGSIb3DQEBCwUAMEwxIDAeBgNVBAsTF0dsb2JhbFNpZ24gUm9v dCBDQSAtIFIzMRMwEQYDVQQKEwpHbG9iYWxTaWduMRMwEQYDVQQDEwpHbG9iYWxTaWduMB4XDTA5 MDMxODEwMDAwMFoXDTI5MDMxODEwMDAwMFowTDEgMB4GA1UECxMXR2xvYmFsU2lnbiBSb290IENB IC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMTCkdsb2JhbFNpZ24wggEiMA0GCSqG SIb3DQEBAQUAA4IBDwAwggEKAoIBAQDMJXaQeQZ4Ihb1wIO2hMoonv0FdhHFrYhy/EYCQ8eyip0E XyTLLkvhYIJG4VKrDIFHcGzdZNHr9SyjD4I9DCuul9e2FIYQebs7E4B3jAjhSdJqYi8fXvqWaN+J J5U4nwbXPsnLJlkNc96wyOkmDoMVxu9bi9IEYMpJpij2aTv2y8gokeWdimFXN6x0FNx04Druci8u nPvQu7/1PQDhBjPogiuuU6Y6FnOM3UEOIDrAtKeh6bJPkC4yYOlXy7kEkmho5TgmYHWyn3f/kRTv riBJ/K1AFUjRAjFhGV64l++td7dkmnq/X8ET75ti+w1s4FRpFqkD2m7pg5NxdsZphYIXAgMBAAGj QjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMBAf8EBTADAQH/MB0GA1UdDgQWBBSP8Et/qC5FJK5N UPpjmove4t0bvDANBgkqhkiG9w0BAQsFAAOCAQEAS0DbwFCq/sgM7/eWVEVJu5YACUGssxOGhigH M8pr5nS5ugAtrqQK0/Xx8Q+Kv3NnSoPHRHt44K9ubG8DKY4zOUXDjuS5V2yq/BKW7FPGLeQkbLmU Y/vcU2hnVj6DuM81IcPJaP7O2sJTqsyQiunwXUaMld16WCgaLx3ezQA3QY/tRG3XUyiXfvNnBB4V 14qWtNPeTCekTBtzc3b0F5nCH3oO4y0IrQocLP88q1UOD5F+NuvDV0m+4S4tfGCLw0FREyOdzvcy a5QBqJnnLDMfOjsl0oZAzjsshnjJYS8Uuu7bVW/fhO4FCU29KNhyztNiUGUe65KXgzHZs7XKR1g/ XzCCBVYwggQ+oAMCAQICDE79bW6SMzVJMuOi1zANBgkqhkiG9w0BAQsFADBbMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTExMC8GA1UEAxMoR2xvYmFsU2lnbiBHQ0MgUjMg UGVyc29uYWxTaWduIDIgQ0EgMjAyMDAeFw0yMjA5MTAxMTQzMjNaFw0yNTA5MTAxMTQzMjNaMIGV MQswCQYDVQQGEwJJTjESMBAGA1UECBMJS2FybmF0YWthMRIwEAYDVQQHEwlCYW5nYWxvcmUxFjAU BgNVBAoTDUJyb2FkY29tIEluYy4xGTAXBgNVBAMTEEFyZW5kIFZhbiBTcHJpZWwxKzApBgkqhkiG 9w0BCQEWHGFyZW5kLnZhbnNwcmllbEBicm9hZGNvbS5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IB DwAwggEKAoIBAQDxOB8Yu89pZLsG9Ic8ZY3uGibuv+NRsij+E70OMJQIwugrByyNq5xgH0BI22vJ LT7VKCB6YJC88ewEFfYi3EKW/sn6RL16ImUM40beDmQ12WBquJRoxVNyoByNalmTOBNYR95ZQZJw 1nrzaoJtK0XIsv0dNCUcLlAc+jHkngD+I0ptVuWoMO1BcJexqJf5iX2M1CdC8PXTh9g4FIQnG2mc 2Gzj3QNJRLsZu1TLyOyBBIr/BE7UiY3RabgRzknBGAPmzhS+fmyM8OtM5BYBsFBrSUFtZZO2p/tf Nbc24J2zf2peoZ8MK+7WQqummYlOnz+FyDkA9EybeNMcS5C+xi/PAgMBAAGjggHdMIIB2TAOBgNV HQ8BAf8EBAMCBaAwgaMGCCsGAQUFBwEBBIGWMIGTME4GCCsGAQUFBzAChkJodHRwOi8vc2VjdXJl Lmdsb2JhbHNpZ24uY29tL2NhY2VydC9nc2djY3IzcGVyc29uYWxzaWduMmNhMjAyMC5jcnQwQQYI KwYBBQUHMAGGNWh0dHA6Ly9vY3NwLmdsb2JhbHNpZ24uY29tL2dzZ2NjcjNwZXJzb25hbHNpZ24y Y2EyMDIwME0GA1UdIARGMEQwQgYKKwYBBAGgMgEoCjA0MDIGCCsGAQUFBwIBFiZodHRwczovL3d3 dy5nbG9iYWxzaWduLmNvbS9yZXBvc2l0b3J5LzAJBgNVHRMEAjAAMEkGA1UdHwRCMEAwPqA8oDqG OGh0dHA6Ly9jcmwuZ2xvYmFsc2lnbi5jb20vZ3NnY2NyM3BlcnNvbmFsc2lnbjJjYTIwMjAuY3Js MCcGA1UdEQQgMB6BHGFyZW5kLnZhbnNwcmllbEBicm9hZGNvbS5jb20wEwYDVR0lBAwwCgYIKwYB BQUHAwQwHwYDVR0jBBgwFoAUljPR5lgXWzR1ioFWZNW+SN6hj88wHQYDVR0OBBYEFIikAXd8CEtv ZbDflDRnf3tuStPuMA0GCSqGSIb3DQEBCwUAA4IBAQCdS5XCYx6k2GGZui9DlFsFm75khkqAU7rT zBX04sJU1+B1wtgmWTVIzW7ugdtDZ4gzaV0S9xRhpDErjJaltxPbCylb1DEsLj+AIvBR34caW6ZG sQk444t0HPb29HnWYj+OllIGMbdJWr0/P95ZrKk2bP24ub3ZP/8SyzrohfIba9WZKMq6g2nTLZE3 BtkeSGJx/8dy0h8YmRn+adOrxKXHxhSL8BNn8wsmIZyYWe6fRcBtO3Ks2DOLyHCdkoFlN8x9VUQF N2ulEgqCbRKkx+qNirW86eF138lr1gRxzclu/38ko//MmkAYR/+hP3WnBll7zbpIt0jc9wyFkSqH p8a1MYICbTCCAmkCAQEwazBbMQswCQYDVQQGEwJCRTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1z YTExMC8GA1UEAxMoR2xvYmFsU2lnbiBHQ0MgUjMgUGVyc29uYWxTaWduIDIgQ0EgMjAyMAIMTv1t bpIzNUky46LXMA0GCWCGSAFlAwQCAQUAoIHUMC8GCSqGSIb3DQEJBDEiBCCEogqnRNtku8akJcOV /BRcd3rq78aGvYQrQETNNY9fgTAYBgkqhkiG9w0BCQMxCwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJ BTEPFw0yMzExMTYxODIwMTRaMGkGCSqGSIb3DQEJDzFcMFowCwYJYIZIAWUDBAEqMAsGCWCGSAFl AwQBFjALBglghkgBZQMEAQIwCgYIKoZIhvcNAwcwCwYJKoZIhvcNAQEKMAsGCSqGSIb3DQEBBzAL BglghkgBZQMEAgEwDQYJKoZIhvcNAQEBBQAEggEA19NksM2NmnoLr4IsZ/H9fImc/Rt0qFiSWgWV ent2bF4/d2zFgxIy3XAGKGvsMvTiE5mVAJHvPVaIugWAXbIJySQbihU6yD2Hrf1tNqD+s8WJykpz lMZ4Jhw7rb+RNDUYoSmDZmhlhp2rVqpDoGV4C7f7aZGgtDnLbnMfGcEnbxbjfoDiwBxvebOAYK4Q +frnM+Naidoc0wnnHPTy4S8n/CCN0n1KuXYMK94GoCfT0Op47+qxb4v+gtr9uacjtCh6h6843Nht IMpHvvCO7rfVb3EVl92ZEOasbcWZ6HJdURrLu5ia0DWf3kx3D2pXpT8+PHTozLU+dJIPSh55t0Fr gg== --000000000000304a3d060a4912f1--