From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794063052; b=B4dJfgibRS50v8HWehjCilbwKRt7Wniqbpn+nixkrji5Isze6q02WWmLtJGorTDH4b25 /jS+aMwCZUWUv6Mz1OAYpX4IANewpUXNMyDUzc+OohnK8fl0yMgLyjEemlzhBUfq2lCbc 5p98BP9wvBFoMUmSTymQW2U2c7HYNAlFHPjYTfejb4KmlN6KQnjF8jF4Io9G8RBRPdX74 i4OJ950+nTMaO0Xtrt9rw7xT4rzYJAsnya6Uc248U0kwaFCPzL7IlUf6jwCOBMv7ikZVi PBrmrLIvYL/a0JejIHIKpy9gOaEcnfPFob1UoSWxXICnwE2kpZhGirAkCtq1QJcW3hQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794063052; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=YDZx9BlEXe/84WmaxJliUzSY1pSVGzTVlndhchEPlEM=; b=j31TzZ9RxOvqYnDRCfXTCurENihYyPlVWalyFADV1sOW3z95odA84YLs8GZWTeE+PUT1 s/tBXsv/HDVo/nhT+IHfjRO126U56LgPvFcvlv7wi/1avODGCuZBIHwLMHB4JIIIEC4tc yF7t/KDrvq0PlkrPr0Q48U2ERBF4t8YHYioAoKIiYl+cQ6vFAJPPWl/Um0c/un8iSLvfT v02PhbSwRf5u8CN0bIn01gQEr5fXh1Om3UjwYVbgaEeVg2QNkRFi272iWMp9ejd2nHFS/ XycBTO5cFJ/XqLvcUJta+cImcOj6JoD1Oe5aRYWqj+4L1e3A3YEZG/zPCDqx9WgbAcw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=KCAphJQr; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ACD6F606A331; Sat, 7 Nov 2026 14:50:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=KCAphJQr Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57D021F0089F; Sat, 7 Nov 2026 14:50:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794063051; bh=YDZx9BlEXe/84WmaxJliUzSY1pSVGzTVlndhchEPlEM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KCAphJQrOA65z2RFw6tLqwET9aGplLH5IhcWv8zjpwqtL+gEJw1G37nxYAQ6z96I/ C0sOwZ3veX1WfkU/AWaO0NOgTlmfryYIX8q62itOCjIDcTQdC2P40JirdSErrd++j2 tmlPRhAp0kJxfDApi7s/+255e8LaOP/rrafIfO2Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Srish Srinivasan , R Nageswara Sastry , Nayna Jain , Madhavan Srinivasan , Sasha Levin Subject: [PATCH 6.18 296/869] pseries/plpks: clear signed update authentication buffer Date: Sat, 7 Nov 2026 08:49:38 -0500 Message-ID: <20261107134902.233700267@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134852.069646174@linuxfoundation.org> References: <20261107134852.069646174@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Srish Srinivasan [ Upstream commit 63de55024e7c85975f4410380323edb05b186d7c ] The PLPKS signed update operation uses an authentication buffer that contains a password. Freeing this buffer with kfree(), without wiping the contents, can leave sensitive data in memory. Use kfree_sensitive() to wipe the buffer when freeing it. Fixes: 899d9b8fee66 ("powerpc/pseries: Implement signed update for PLPKS objects") Cc: stable@vger.kernel.org # 6.3 Signed-off-by: Srish Srinivasan Tested-by: R Nageswara Sastry Reviewed-by: Nayna Jain Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20260923182816.151451-7-ssrish@linux.ibm.com Signed-off-by: Sasha Levin --- arch/powerpc/platforms/pseries/plpks.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/plpks.c b/arch/powerpc/platforms/pseries/plpks.c index dbfbf12bda3c0..719f7e513c5a4 100644 --- a/arch/powerpc/platforms/pseries/plpks.c +++ b/arch/powerpc/platforms/pseries/plpks.c @@ -479,7 +479,7 @@ int plpks_signed_update_var(struct plpks_var *var, u64 flags) kfree(label); out: - kfree(auth); + kfree_sensitive(auth); return rc; } -- 2.53.0