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=1794064334; b=ZlxgjOkSLWeR9GFJH+VkOBDh1ezZJ0O1ujv838H44ko58LklFvU8fhKrDJ1QOIuv6Fqp k6PTS6usGJh256Gh3EH1TE2V+pVrO4LGNunpgUe4TfmUY0DyRWH/IB6loQPSuV/trN6ia HZbxp20dE5VaxZIxZxKLRcvdQm8SxrzyJraXKrr7f9yR6HHtyXmGdrdQfKqbl4A5BYaxm 6cz+sxknt76tlD6L+xWsZcL7SZsDRuDJp3vRbaESrwAp7SdCYvIuMgWts4FcGX2JEsTTD rioD6yrGGBS5aFpxsTjT2zgYTzcohAgKwbcqJH0Yd7BOvkvSBX1pZ4zFhoQEtvl2Fqw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794064334; 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=6aAs1bCCN/1x0xo6T7rfOydgiue/eYXiu/cvIFUJ+YA=; b=KSj9sG1XjBy32jmLNE5Kjby1h8MZuPqh/waY8cbOt4HI/07LmRdJ9hktGbFrkfeQIoko bl+p7lcj5f2mWgvL8rw3bnEsh3a/MkMS6orCi9Ri0FlMmeYk1mDInLFa1o/jzZ2041y/B vVpO1tPGvj+shEaTOHB6xOnEwkx5xHEiaPKysNKvRkdOfXzSLzMrN97BHuKZ0q1M/lTPs pdkVipNRou7QLYU+1bX8LQ1bfq/HJJZGHLVrlJNzbiW1lv/He3PeXNkq/NuxLpEQ6dOit FnOF+QxJAFfMLb8s0oZFEkxv9LEwxXyWoS8IB1Gd8shl2U310JgqYKsNCnCme7g6hMw== 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=T6bEJ09c; 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 45FAC606A33A; Sat, 7 Nov 2026 15:12:13 +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=T6bEJ09c Received: by smtp.kernel.org (Postfix) with ESMTPSA id 817FC1F0089F; Sat, 7 Nov 2026 15:12:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794064333; bh=6aAs1bCCN/1x0xo6T7rfOydgiue/eYXiu/cvIFUJ+YA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=T6bEJ09c/p/8f3IelcrsaH3xNJC9+h5Gd6Ht98vuwZPq2p2tqwkqv72FfPxxdIqiT GPy8bVTzzKYkLQ3rtFiUmWJw2Ewl6BWg9q04x+tdibg7Adcl+aE6AEgCTHPrKAn/zD y/n0xv8W30DWT5yg4KZ6JQl9OvzeTnpKyH9MWYoY= 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 7.3 0381/1257] pseries/plpks: clear signed update authentication buffer Date: Sat, 7 Nov 2026 08:44:37 -0500 Message-ID: <20261107134950.073265068@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134939.434104957@linuxfoundation.org> References: <20261107134939.434104957@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 7.3-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 17a73a04d45b4..b057e378a6b39 100644 --- a/arch/powerpc/platforms/pseries/plpks.c +++ b/arch/powerpc/platforms/pseries/plpks.c @@ -685,7 +685,7 @@ int plpks_signed_update_var(struct plpks_var *var, u64 flags) kfree(label); out: - kfree(auth); + kfree_sensitive(auth); return rc; } -- 2.53.0