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=1792774113; b=0FTA7AXGFfPyixcm1ZY+MWOgVyQxyTqFDXj2rGXorBxZBQbrw1YTaonWEgdaIOo5GQh/ qCDm9urT/M0Jz+/uksrVH7hnXHRxyj6s2BMaDxp+VI1WCwNNwH3RwXhHsiTqhrECalGTH Dc+QH26dpS17ZbvjgJNaGpljsM9nD0Bt8ZjDCOGUnTwd/6fI7dU+JYuznienPyRw813Qc PZeuQ2/AMmP0K/X+/5o9aQmt1ylmtOpEq+eswt0WD5/M7vtY4tC3BKPkNcDPr8TdDlQZr /kS5DfKxNsrY+IpdBvZADP7DOvhMrmrWW0YqYQDFkAp6rGoe7GE62Pe1/8BDab0GVAw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792774113; 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=DUIRMJU6P5FKVMs+dFXCq0y6n09kr8YaDsYu5BxXUeE=; b=F/5FanutYZC0Cyjyxyhakydk5r9IUwcIdGPtAbwOcS0QzAlFSs4vgbt5knKeifggJZTy VvJiKT8zyaSxd4VVbYey43ETUdJDA+eLUOIDyp3Pju03iOaJpx5DTM+gggWKCnjmwyMpD U65e9/XcSwNsduEeBFMnrL/tPwg+zmgjbsOjjtNze5JFQxpsZD6A/L0gQAhD4UyEF+sQn r3a9wSFRU4mjtDwDOGDzS90S78kCW2CeJP4ua4Y0l5726+4COhWoqueFVHKBHAr048ETg gPrLyU+h6e/uPUOYb5dyOXWIkJv+N0POjT7GJguudomIN+IUKzWoyEecXe3eshGPC4Q== 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=MkxYnxVU; 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 BB1CA606A31A; Fri, 23 Oct 2026 16:48:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=MkxYnxVU Received: by smtp.kernel.org (Postfix) with ESMTPSA id 161A71F01825; Fri, 23 Oct 2026 16:48:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792774112; bh=DUIRMJU6P5FKVMs+dFXCq0y6n09kr8YaDsYu5BxXUeE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MkxYnxVU/u05/Wqui125VweAtp4pK6nZj+Y6rGMhIPuFnk/6+Sf3r1ccAddR2Oes7 8B3LTbu0JIfYM0V/1/sX8ghqOPLQezTP4D8T9EToVKBP9ZM0uLP9fGf/qt3Wo/0SM3 txsETSHMtsOIY+pd+bbBdXERvUooSy6ZIeE2Dx5E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Genjian Zhang , Mikulas Patocka Subject: [PATCH 6.18 124/193] dm-ebs: fix incorrect device offset check in ebs_ctr() Date: Fri, 23 Oct 2026 18:36:41 +0200 Message-ID: <20261023163717.138789337@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261023163714.201276352@linuxfoundation.org> References: <20261023163714.201276352@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Genjian Zhang commit 7ac81e2d2240f2c57bd073b0733e0b2abca38e82 upstream. is a backing-device sector offset; ti->len is the virtual target length. Comparing them rejects valid tables, e.g.: dmsetup create ebs0 --table "0 1048576 ebs /dev/sda 2097152 1 8" -> ebs: Invalid device offset sector (-EINVAL) Drop the check. Bounds against the backing device are already enforced later by device_area_is_invalid() via ebs_iterate_devices(). Cc: stable@vger.kernel.org Fixes: d3c7b35c20d6 ("dm: add emulated block size target") Signed-off-by: Genjian Zhang Signed-off-by: Mikulas Patocka Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-ebs-target.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/drivers/md/dm-ebs-target.c +++ b/drivers/md/dm-ebs-target.c @@ -265,8 +265,7 @@ static int ebs_ctr(struct dm_target *ti, r = -EINVAL; if (sscanf(argv[1], "%llu%c", &tmp, &dummy) != 1 || - tmp != (sector_t)tmp || - (sector_t)tmp >= ti->len) { + tmp != (sector_t)tmp) { ti->error = "Invalid device offset sector"; goto bad; }