From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C13F4381AE4; Fri, 7 Aug 2026 15:10:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786115438; cv=none; b=EZ/X5zYE2gx6hL4RGq66nmfq3i3OSczzGVcEzeV2zVagnAcuATWM5rMbEnR8DxxJG4CsgwD6+u+ZY/WwKezbptw9VILrhiLZq5h4vyUNa2UwnaoAceqdJpgjXBYed0Dk4PKFWz/NBT0+YqvPODnXygP3DQYQxftVBHYDQ1IxH6I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786115438; c=relaxed/simple; bh=GogxRZnNcm4sO07UMqX6yuUTyodE06/nIY0w8LHlmVE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CaM9jIuoc48gRY68sBPXQDKWhkRgASV0+eYF10w0J7NtDH8nD1ggZYYxGXCeGTXShjNTTi67IucMnmmc8vqGkX8mNq5T0WSZuVCVCUdwlutM9D1ReUI0idI4VLjHbN+CI9pmQNGtOIeo3y08xznaDqnnyuCzNvZTwaoD5j5vT4M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=iHjNUwB4; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="iHjNUwB4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7CA01F000E9; Fri, 7 Aug 2026 15:10:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786115436; bh=o1ANWu0HtYYC1YpchZ2qxBpDVg+pUjOumGI2Y8g4Y18=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=iHjNUwB4M3fRIUAnr22myULYPKDLrl7LruMsmeC0VO2DoWy/akjysNrL7IudP3UeI o6z1XyAgQrvThHXt2UiBIOE4teIPJ6Esdek9SsHBf0HQcPds5iIJLYpPYF8v7onG1Z /IiVyb6RTdlXohjliUWqPkx7s2WHBWepWyseHcJM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Finn Callies , Harald Freudenberger , Vasily Gorbik Subject: [PATCH 6.18 274/396] s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs Date: Fri, 7 Aug 2026 16:37:14 +0200 Message-ID: <20260807143430.169099316@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260807143424.272339768@linuxfoundation.org> References: <20260807143424.272339768@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Harald Freudenberger commit 983279d7f86ade73db86f886e09172dd567031b5 upstream. There is a wrong upper limit check for the domain value when an EP11 CPRB is processed for sending to a crypto card. This check is only active on custom device nodes but may lead to access heap memory behind perms->adm when an administrative CPRB is sent. Add correct limit (AP_DOMAINS = 256) checking to fix this. Fixes: cfd68b33094e ("s390/zcrypt: Filter admin CPRBs on custom devices") Cc: stable@vger.kernel.org Reviewed-by: Finn Callies Signed-off-by: Harald Freudenberger Signed-off-by: Vasily Gorbik Signed-off-by: Greg Kroah-Hartman --- drivers/s390/crypto/zcrypt_api.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/s390/crypto/zcrypt_api.c +++ b/drivers/s390/crypto/zcrypt_api.c @@ -1083,7 +1083,7 @@ static long _zcrypt_send_ep11_cprb(u32 x print_hex_dump_debug("ep11req: ", DUMP_PREFIX_ADDRESS, 16, 1, ap_msg.msg, ap_msg.len, false); - if (perms != &ap_perms && domain < AUTOSEL_DOM) { + if (perms != &ap_perms && domain < AP_DOMAINS) { if (ap_msg.flags & AP_MSG_FLAG_ADMIN) { if (!test_bit_inv(domain, perms->adm)) { rc = -ENODEV;