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 34F2D341AC7; Sat, 30 May 2026 18:05:36 +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=1780164338; cv=none; b=fHPznDricBwFUxzByObTAKCKIPXdQtyYxPQjwrnNwhpTma44x4ai864rCMjGIkz4XRrCVXJCwq8dmxe3jyDg2Y0W0SruvrGNkh+JbvTk01rd7w1Kp6auN+959ApLjI/VrhfpI3YkuHiwj4xfNoAKNgiBuNE7+s6J9lpElP3UqhE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780164338; c=relaxed/simple; bh=RTsFj8iRKJJ0rFGf7VSa0gNuXk8wT6DRjU2tnBf0BWU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SVm9myPp/5c7CfSU+sIIsbHYjmhvYTajn7bAVPsivd6fPPrvGBbGhuVXhslYPwjc6GNumYqN/rLvwHeFTLGDcS6BO8suN9IFJKa5NqDPdI4FF+phaaVEk5F7lYrxZ9p7LkVs26kTDmWMRiNVE5kzhqRfZ7TDZP9Ty1I37pWBBak= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0mqg1kwq; 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="0mqg1kwq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 079B71F00898; Sat, 30 May 2026 18:05:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780164336; bh=G948YoqqogHdLfVGd9QAKWDVtBB+oYTAhix92RlV+Js=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=0mqg1kwqN4f181Cl33y1bbHtEQKzhV+7fJggDpDAOYZ1zVUWX2aZM6OneGPjCiYmg bXRgCXCflDBdtl1dmFWvUGmlEzYG/7Tb0DrkCUzXHwXEv41G9bBcZFYP5Yym887JPr z9VRz4akdl1jOSb+/YJyGEETs22YDqTIav3QMIxM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Junrui Luo , Yuhao Jiang , Joseph Qi , Mark Fasheh , Joel Becker , Junxiao Bi , Changwei Ge , Jun Piao , Heming Zhao , Andrew Morton , Sasha Levin Subject: [PATCH 5.15 495/776] ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison Date: Sat, 30 May 2026 18:03:29 +0200 Message-ID: <20260530160253.098584597@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Junrui Luo [ Upstream commit 01b61e8dda9b0fdb0d4cda43de25f4e390554d7b ] The local-vs-remote region comparison loop uses '<=' instead of '<', causing it to read one entry past the valid range of qr_regions. The other loops in the same function correctly use '<'. Fix the loop condition to use '<' for consistency and correctness. Link: https://lkml.kernel.org/r/SYBPR01MB78813DA26B50EC5E01F00566AF7BA@SYBPR01MB7881.ausprd01.prod.outlook.com Fixes: ea2034416b54 ("ocfs2/dlm: Add message DLM_QUERY_REGION") Signed-off-by: Junrui Luo Reported-by: Yuhao Jiang Reviewed-by: Joseph Qi Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Jun Piao Cc: Heming Zhao Signed-off-by: Andrew Morton Signed-off-by: Sasha Levin --- fs/ocfs2/dlm/dlmdomain.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index 5a4b0f7293fa2..45b1ae68c179a 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -1002,7 +1002,7 @@ static int dlm_match_regions(struct dlm_ctxt *dlm, for (i = 0; i < localnr; ++i) { foundit = 0; r = remote; - for (j = 0; j <= qr->qr_numregions; ++j) { + for (j = 0; j < qr->qr_numregions; ++j) { if (!memcmp(l, r, O2HB_MAX_REGION_NAME_LEN)) { foundit = 1; break; -- 2.53.0