From nobody Mon Dec 1 23:02:15 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 D5BE033F381 for ; Wed, 26 Nov 2025 16:36:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764174982; cv=none; b=ramq//7O5s/4eDwvpy/uV81LULAFoJRUc39oB25kXWnskjdwgClqD7YFy3OPwS+MnBJIZ6Wwc9Z5WrCvlEmZUTpAr19WalS5+ykG/4ZkZai7R/CTOTQx07hph5gBdU8rT0G7qb7YNHN01+1ajlw4S/6raTJpCUlshWuxALJaE0M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764174982; c=relaxed/simple; bh=IU4kgx8Wn4nALVRtMfyab5Yub53eM6C01xg0lQHuTo8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OFKA2CH5TNnQQrn+W5Qq9BaG0mTvLfJx1qpA4WUoxpmW37GXktblqw7if1P/2+/6VPIiOSrrxVwPhqaxG6CEk10B/4RRx02tTVQrczuXinU3OQ0cEQ+/6+PNYzFrHvRj7Un4HZz0aZAxHsWNsfAjfjhVCbudjfFqT7lRV5fsz8Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=QdqvE0j8; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="QdqvE0j8" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1764174980; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fLbOYH1ZNvDH2OUPDGLBHO7mvrdHvaUK8HEzMWWFf5s=; b=QdqvE0j8eYFgqoDPsq91QNInIaCINVaJ3OoWKcvbTiOA0CJGkP8lae4HLEPLDyNQBZm08n BxPe60vp3h1AbEQCt5dcfkBewxH7fik2HMs7UrfNHLN05rpeH3ayWaPDu6W/o3LU4ueHlT m4SC/6xOCnqtHLqeqM5Nty3qsKGQII8= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-111-V2gLIDVUMA231heVvoz5qg-1; Wed, 26 Nov 2025 11:36:11 -0500 X-MC-Unique: V2gLIDVUMA231heVvoz5qg-1 X-Mimecast-MFC-AGG-ID: V2gLIDVUMA231heVvoz5qg_1764174969 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 9057B1954B06; Wed, 26 Nov 2025 16:36:09 +0000 (UTC) Received: from localhost (unknown [10.2.16.50]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 80B941800878; Wed, 26 Nov 2025 16:36:08 +0000 (UTC) From: Stefan Hajnoczi To: linux-block@vger.kernel.org Cc: "Martin K. Petersen" , linux-kernel@vger.kernel.org, "James E.J. Bottomley" , Mike Christie , Jens Axboe , linux-nvme@lists.infradead.org, Keith Busch , Sagi Grimberg , linux-scsi@vger.kernel.org, Christoph Hellwig , Stefan Hajnoczi Subject: [PATCH 2/4] nvme: reject invalid pr_read_keys() num_keys values Date: Wed, 26 Nov 2025 11:35:58 -0500 Message-ID: <20251126163600.583036-3-stefanha@redhat.com> In-Reply-To: <20251126163600.583036-1-stefanha@redhat.com> References: <20251126163600.583036-1-stefanha@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Content-Type: text/plain; charset="utf-8" The pr_read_keys() interface has a u32 num_keys parameter. The NVMe Reservation Report command has a u32 maximum length. Reject num_keys values that are too large to fit. This will become important when pr_read_keys() is exposed to untrusted userspace via an ioctl. Signed-off-by: Stefan Hajnoczi Reviewed-by: Hannes Reinecke --- drivers/nvme/host/pr.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index ca6a74607b139..476a0518a11ca 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -233,6 +233,11 @@ static int nvme_pr_read_keys(struct block_device *bdev, int ret, i; bool eds; =20 + /* Check that keys fit into u32 rse_len */ + if (num_keys > -(u32)offsetof(typeof(*rse), regctl_eds) / + sizeof(rse->regctl_eds[0])) + return -EINVAL; + /* * Assume we are using 128-bit host IDs and allocate a buffer large * enough to get enough keys to fill the return keys buffer. --=20 2.52.0