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=1793211872; b=Fb+59fC/9dhbjblvRIWvaEWY8UNbedh7Ggqm09tufaFfXmN/RophoVi7OjLeqaB6EPpG pe8u0z/cVGdIVX0Fak1DeDC348CRgheMP6twHfAgxw8jlu9xBXM1v80qM2wrBMFIJRD/g +cLePYOUVHb3OO05kTti3iMLmsYeWUhmQ545RiXT0lW0hFoSwTU7rbb0DBiIIrlGBDdi9 x/KO0WzyWnAambEQA8nnQdcUYxzBPiPaq/ewCPJgkVx+ni7aiWm8lI2C4jFpSyJX4vgJ4 hfEFGzUt/Deiwa4qyNmG4XFaFpUt3T4YKo9um5E3JQn02PxjsPTLv8V6cPNHsGKroEw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793211872; 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=Io7nbV8ymd75KN/a46Ht0gbrD2jcGeB5dUVOkQq0EQ8=; b=Fw7MQrwIvFpxRK/7IT758zmaY9Dxs7Dats7esm3+zd0+NwLXxRkZ1q+zxbLip6kB2r2e nr77if54OuffGK+rAAlygwI+aWfra3o3I+MxRz9zAKhnz0ZYvy4sdBwiT9CTPPCddK2ro HLT/G2QeMAx73lTYqAj9pmcFLx0U+vxZ37gWBwxOFZs1Cb5mzISu2dcBj7OfjN2xNDakM 4nnHo8LRBdkbH23gYTgEMGqeZZNFqflknHsB4RFkYH7ZvRM+6YqQ1/T5aGHAM5bVZCOcc HmOfN37cjXdt8JzmK4mGP6U92GGliWsx+xpas69oUhxwRJzswFMDuzjJI/OnQjkeshA== 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=vAfRtqQZ; 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 71FBD606A31F; Wed, 28 Oct 2026 18:24:32 +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=vAfRtqQZ Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2D971F01825; Wed, 28 Oct 2026 18:24:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793211872; bh=Io7nbV8ymd75KN/a46Ht0gbrD2jcGeB5dUVOkQq0EQ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=vAfRtqQZ6n32rTfLjvtmH6VEymT7RQfae4RlrmNpjsjt+GBBAOrCl/14swjfjhMHP rtX/n0k6jBNvlOufkxuygX96rg5rbqxeHKqr8MrH/QbQe0+dKpvW31CVXkP+dhA3pK N6BY8As2FlzeqdNL9FalROnftkyb7Zjl/fGIIBu8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Genjian Zhang , Mikulas Patocka Subject: [PATCH 5.15 513/571] dm-ebs: fix incorrect device offset check in ebs_ctr() Date: Wed, 28 Oct 2026 18:01:00 +0100 Message-ID: <20261028170020.201574891@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170008.009143722@linuxfoundation.org> References: <20261028170008.009143722@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 5.15-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 @@ -263,8 +263,7 @@ 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; }