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 1463D36405A; Wed, 20 May 2026 17:34:57 +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=1779298498; cv=none; b=suVEDJQq0LtjB23/610CTo57pa1rJAiUqvaAvh6AW/Fnt0I5GM/G7CuHy8VipmU9FzY9taS4hzYJUUDECkPVVliHYGjWFNAIfJurlCG8BtwOA8IX1bH6fTBg0H58vm5ZTCJHm8wr5YxNPgu+6k3mu/SPI7qz8CqOV6kg7OSqCSQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779298498; c=relaxed/simple; bh=z+Mib6AuvYl+rwe9awEVF/TjgEJ6o/ZEjeooucbRckU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hKXaUzG/sG62cXLqn1TrfSJQzjvC04Bkr/jsporlq2GLM2AIgC+a+rQMsrs2z/ND8AuFOvSJ/irNzECjEbD0kXwkl2wvbQGkyzI+qpXPm4dRWzX2zJ1bdDDldH/TY5rZQV2CfK8ZGj81zhA7ZH+YBMBBL/EsrWCeMUyCrA3F/xY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nrX2eArG; 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="nrX2eArG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 819921F000E9; Wed, 20 May 2026 17:34:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779298497; bh=iVHVB0mGx4rUHiiyGUxhCd/YAd6kxZYjbGuAzCbLZDE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=nrX2eArGO7pQcWQRScxu0ceJOE1usS8xTvfQXRG+M3GNDS5aPLKeKQpmwLfIlC/Y1 +NB9A7OLgKT5iexE8siKWmszfz9myuoMJkrlu9qKgQjSOGEuPgJrvFgumOz89jgaJ1 9kYUmejImVux2aoxax4F2d/JQchZ+807S9Z5Cek0= 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 6.18 432/957] ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison Date: Wed, 20 May 2026 18:15:15 +0200 Message-ID: <20260520162143.890535004@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260520162134.554764788@linuxfoundation.org> References: <20260520162134.554764788@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 6.18-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 f159785a21116..09bee7b86815e 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