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 5EB64442FD1; Mon, 17 Aug 2026 15:20:48 +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=1786980049; cv=none; b=WJP9LM3wAw4M0tS0p8c+0maDi+X3CGn6gyG8ZbzKhfOgLQOxYqgZ7fK6GI5Nxhd+ROm9V2+Eq7ILUEJxlvTiy0PRf+FmDzzsjS64k9t/OBiK9GI1RVE5wwoEMvSsifPeRayMEzsbBxKa6k9PqgZkSshxa6e8kpJYNAgMxKK+hl4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786980049; c=relaxed/simple; bh=Nzjx4Pu6L5JzxRAHsLs6LBgKcgqaKRWpwmNlO7ouUow=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=n5r/qHkfbrrDDGzsx2EmAKBpOFCLO0X79atkzYO1UcoPcjgCc8T+0LJ1qcGgfOI9DXu7e+Pzn84yk0iLpXSdM4N2F1GHglHj74xelSg24+LTuL54TNH6/HlhKT4QLpoyzfZg3DGbrYAbl3I7u8l/Tm/WjP+LcZoEl0X5t70oqxI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=KinEgCb5; 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="KinEgCb5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B68991F00A3E; Mon, 17 Aug 2026 15:20:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786980048; bh=wATLH7eqpkZBKCtRBqwOAPV9g0YaUFDpiK8pLpHmsm4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KinEgCb58kii4OTmEDfmqu0QbKMuY5QpNaXWZaQPC1xhOEQSusPAX8UQT3dYnBbMp 6+rO+5t7iO6vlGa9PCVL52G4SBtkUf3Nf9OUakT9T6SSmGZCpzSKV5K3J1ZnwPCti6 XIiiHNhQACPAmAlV2YwJ8bPOOyDmzXXWH6Hahak4= 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 6.1 437/609] s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs Date: Mon, 17 Aug 2026 15:32:13 +0200 Message-ID: <20260817132558.729724577@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260817132543.039278408@linuxfoundation.org> References: <20260817132543.039278408@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 6.1-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 @@ -1119,7 +1119,7 @@ static long _zcrypt_send_ep11_cprb(bool if (rc) goto out_free; - 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;