From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.web.de (mout.web.de [217.72.192.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3ADF86A039; Fri, 17 May 2024 14:18:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.72.192.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715955519; cv=none; b=XVEsbi0zh90cr1ZNxzidPbZz2Ke/OajeXQFJhSwpForzQ5OHEX847nhFLIPhQ8yzJErm9cmEgO8WfuN4bW/HJyk50GCqQiFFe3OhA1Uq2a2eiXwWGipUGdL1VjaI1ygitCnY/dDUHcu3/AD9qJZALy9CImz12H9ccM+vuj8sQB0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715955519; c=relaxed/simple; bh=0MyMW8f2yRiwRYOL0mM92snyp6FS/EYPmtOXgJsGijQ=; h=Message-ID:Date:MIME-Version:To:Cc:References:Subject:From: In-Reply-To:Content-Type; b=crOrc49y/MqKUH6jTYkHJSsU3wXg95ECoSNYOd6ieIWJahewZFilBz9XrNyCUIpcNKxqwjeVr2LHI+MZjqtTY07CyAqGvww4lKJVKAtF59T41LGAggyLB80+Z1mVq1KKMoTUVohf/12c3gJsRKF6rRqP68qVveqGueFzbR9N7zA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de; spf=pass smtp.mailfrom=web.de; dkim=pass (2048-bit key) header.d=web.de header.i=markus.elfring@web.de header.b=QtcX2HJH; arc=none smtp.client-ip=217.72.192.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=web.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=web.de header.i=markus.elfring@web.de header.b="QtcX2HJH" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=web.de; s=s29768273; t=1715955491; x=1716560291; i=markus.elfring@web.de; bh=MwR8LNQW+IMvspEyi0NBIl4LSDNfg/OLDJRvmnbFCoA=; h=X-UI-Sender-Class:Message-ID:Date:MIME-Version:To:Cc:References: Subject:From:In-Reply-To:Content-Type:Content-Transfer-Encoding: cc:content-transfer-encoding:content-type:date:from:message-id: mime-version:reply-to:subject:to; b=QtcX2HJHV2KmujFtpsgapQ65G+rGFP9J4ToVT89CzDXBiZiOs7cAWs+QGt7n+j8P nOd5mewiZV19AUgb7iiEQpO2qiweI5sMDqM5aZZY48nTJNHDLEPXV0b7DE0OhOpkF 1RQUZf2kLmvg1S1Uk67l+cHS2ONB/46RGK8ZTLJnhE8GQ75sd7gfGv8c85zPvmLny MLD4Vk6QRd6bLuVnvJJw0wmF5AWr6d4i5o1/pLLwzjOWpL/k3rHuCuoEvEa1YPCGQ qrbgWj7geSMR01mp6vcWtEP/X7E4SgnBWtf2AqH3L6eDwCe4ElvAGlrkqZFzb3bRY 37HpYSTIEhYST3YmZg== X-UI-Sender-Class: 814a7b36-bfc1-4dae-8640-3722d8ec6cd6 Received: from [192.168.178.21] ([94.31.82.95]) by smtp.web.de (mrweb105 [213.165.67.124]) with ESMTPSA (Nemesis) id 1MuVGC-1sP5cX0fH0-015rih; Fri, 17 May 2024 16:18:11 +0200 Message-ID: <1d470a85-dd92-44d6-9900-db4c581b68c4@web.de> Date: Fri, 17 May 2024 16:18:06 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Harshit Mogalapalli , platform-driver-x86@vger.kernel.org, kernel-janitors@vger.kernel.org, Hans de Goede , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Srinivas Pandruvada , Zhang Rui Cc: LKML , Dan Carpenter , Dan Carpenter References: <20240514092656.3462832-1-harshit.m.mogalapalli@oracle.com> Subject: Re: [PATCH] platform/x86: ISST: fix use-after-free in tpmi_sst_dev_remove() Content-Language: en-GB From: Markus Elfring In-Reply-To: <20240514092656.3462832-1-harshit.m.mogalapalli@oracle.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:uoqGK2Tqhp1g9qS8V6PXvJShn/edR8b0iG4aBWJ0nSzYKCsBBw3 TDQO5fJP6GObkdfkU6MRPbJ+MI5ysZnP5svtFTg3ShY5Ogk5p5hH9wL84NgiBORdbXyy65a J67YrwG3yvMVYkRnm3B+nwQD4iW3gevx4yOH39Is5xETu2ez92obeL6coU0Ln4Q95G19XtZ dR/N/ZPqatSL3eD4mbSMQ== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:r7kbR0dVTzg=;uXbK75gC63Hvf2FC2E7M99KA3uF Trf1ixyVNxqsSUXKLqrl1cdpd40u9DvlH+Zk7vVOFqLDY6hcAv9om7vhkDB2N2YvfvmNXCkH9 nwyAQ8+CmaBG2+pSAGTcWmrjB0kSi64ZJmqMpdd1M/fjwNuOVN4EQ1nYcenLFw4QS76f9EB8m sc0JHaSA/GB+YcMx5EwO0f0+HUn6skSx4/pxO8kuYZB38wThvIoJq5r4tELQR6Sr0WBV2hI6C c6dIwGPeHa7GjkiuLEOZ+wNoiV2e22e3BkEEUPVGnPRZ56hu8m4Hl1yBAesPvJ7UvU889ByUy Nm5dY8G2PIhmrQmorhN1CMIIoV9JjCGxyOUc6YLeIJEEGkmAsQpuBavAj9np/MAIGdiylD3Ka JM3S2mlpw3mokFQnUj+uctXnns8xyOvp7Xwva+0/VkkE7SuBbd2NllCgzvw04ziyjHzkKqj7R ZE8JjvOhdSqRSdYy3pw6W3b4nln3MnTgPmrG6IvndZYUxJuprUQhYZ3AZet8JXQYESOgS5JxN dEuMlp+7+GLASUY7KM8713ox7SramMifOaf6yqTcKZoSSHXIMvQ0qPAV8rq9yqKMTelRT0Ci5 Hz6oIRiC+D5LWsk5faTSqrhZN1fbqHgmBCwfLuyZ0+J4tL8/udrJefVGI1IMWzx2TW939l0t3 kbVbbjANOVqE7G7OonP4ar+gO9ff+iSkVazwOAK9F4mlpmelP9PttZ/sVkP6C/r3u6Y3La73e BobdJD0ENqi3zRf4cZxsoL1WVCRiokMd37tYd5gMpV4xhgaMga1VbCsfKOE7VWEk6V0c6vSSM hge1d6mtd0IsQn+OWUQMvItT/mMylAR3NyqmIV9PnjBMU= > In tpmi_sst_dev_remove(), tpmi_sst is dereferenced after being freed. Fix this by reordering the kfree() post the dereference. I suggest to take preferred line lengths better into account also for such a change description. Thus the second sentence should be put into a subsequent line. How do you think about the following wording approach? Move a kfree() call behind an assignment statement in the affected if branch. Regards, Markus