From nobody Sun Feb 8 13:29:41 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 82EB71F3D31 for ; Mon, 24 Mar 2025 21:56:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742853388; cv=none; b=UAbUgBOk5pj4oYWAr/tebs4HE7saVjlB22kXhIWBJlLQZAWs9qTa5TW39l0aKzSciBpku5NNtBtW6VyXjj3auzO7Btgzu65ybOL/v6Q/neh6xp1sQOFitbOlasHEQct46T1S53/0Rn+m/mmW6qn2kuG/yG76ZqOy3fN3T67Y+i0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742853388; c=relaxed/simple; bh=eR7/QObM3jTZYr0HPhlYeu90wXJiFEcy1CoDJ5gLsqM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=u8FoujO3oNRgMkqYEqu5X7K8IMu5YdqYiC0GUl29QWpc2LMduNEqfA8ytbBGuFfZa4eh5Jnvy/AbUmUb6JFowOVZ3REWvZ6oG5qwsx3ihfWbg06hEtR2MDPcGgJtS7NGwTKfXMHB1ONSM/GjqoySVlfBBsDGZ5UF/iC4McQUoz8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Y3ogsvDr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Y3ogsvDr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F1DD3C4CEDD; Mon, 24 Mar 2025 21:56:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1742853388; bh=eR7/QObM3jTZYr0HPhlYeu90wXJiFEcy1CoDJ5gLsqM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y3ogsvDrD+H4FnJ051NMhJZsEcDl+n8psooSbTSCzIvh4X6WH0u5HCWIu3G+NKWQA icIjsHuq2PqzOilR++sf3oHMQ0UIxLYmQRPAPonf555qDXh6Vnb37ZCBqHt7yd0LSw ITB/rC5KLyMQumZB7WgPNsFqjOSMOHDVR88NnZB92wpUvUsOjncRPKfIo8Y3PoecqX 9k+e+HqJ0oiMyR9uMf97xrRzcq3qNY5Us/b9HxY/Xgj9z/Johk7v3zxZF1GVG2Xbf9 3fuVTrhtMsY+KmeHfz2lZjyU3xOf07oSadYd+KGDArNqeeA6GxaggfgRK0y86CT3U1 Vd0F1Cw82TPiA== From: Josh Poimboeuf To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Miroslav Benes , Brendan Jackman , Nathan Chancellor , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni , kernel test robot Subject: [PATCH 15/22] nvmet: Fix out-of-bounds stack access in nvmet_ctrl_state_show() Date: Mon, 24 Mar 2025 14:56:05 -0700 Message-ID: X-Mailer: git-send-email 2.48.1 In-Reply-To: References: 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 Content-Type: text/plain; charset="utf-8" The csts_state_names array only has six sparse entries, but the iteration code in nvmet_ctrl_state_show() iterates seven, resulting in a potential out-of-bounds stack read. Fix that. Fixes the following warning with an UBSAN kernel: vmlinux.o: warning: objtool: .text.nvmet_ctrl_state_show: unexpected end = of section Cc: Christoph Hellwig Cc: Sagi Grimberg Cc: Chaitanya Kulkarni Fixes: 649fd41420a8 ("nvmet: add debugfs support") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202503171547.LlCTJLQL-lkp@int= el.com/ Signed-off-by: Josh Poimboeuf --- drivers/nvme/target/debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvme/target/debugfs.c b/drivers/nvme/target/debugfs.c index 220c7391fc19..c6571fbd35e3 100644 --- a/drivers/nvme/target/debugfs.c +++ b/drivers/nvme/target/debugfs.c @@ -78,7 +78,7 @@ static int nvmet_ctrl_state_show(struct seq_file *m, void= *p) bool sep =3D false; int i; =20 - for (i =3D 0; i < 7; i++) { + for (i =3D 0; i < ARRAY_SIZE(csts_state_names); i++) { int state =3D BIT(i); =20 if (!(ctrl->csts & state)) --=20 2.48.1