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=1794590386; b=kxNMWYUoLxeMOLBH0ZgeSSXbwKvH9qe05MbwGI6LcYQbITZmgtD4dKBUpadOuwAbZ7uZ T2/9qcA9GJE6haXVhh7L5Wm57s+DOJAc5NQzPdiULst+9h9sFRmdGr4xl72gGvL6Nr66N ZAZHq8GK5ruGSLI0Q+nj9byREA56hZqjYqUDCDvQm1o4eHDfydJ5pjN0a2VZv0x7r4FvO YJTGjcrK7bkgRQ+Izuo2uh0tkwUvyLqvsh+3DyVFgviDZQOa49bV9yGO+kRGHCL+HSL5X iIQojjqrf1BBm3ZcbzFFlxwdM3whmq5pK1ipN2qzrKYb2a9EkttJhrHmxiTNsUr2I1Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794590386; 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=do8S9UoAkrAwKTpO5e2BtehQ8aqJJKBAukRrhO7xZUA=; b=kiKkHOCdHB6ZcPEd/s5qzr7umHfMPjrFfC7O0lMcsA3WPErd7Htfp2Jj4vDDNEvrYgNh kOHTUFmfJzcmohiO1+t1frj7/Dt907d7ww238wU395BJ3vg1JQIJMQ0CR1CsBUBq4yN0V CMF2XyFRTcj0X15Z85opDOeXu6UcXANrjTDlKCJqv53A0cDF576WtS3s7rgofeR+bLQMY rhQvcaX6HI3ESgh3Xt9jo/uRWE9E8GpjtrAGH56uJGr7XQNM3EWnvcRJxzrDW1nmF4Fog CSrFpb9Zwrn4IUUWy9cd1rO7cPJJmTb8nITSyoS+nOolmWJMrLUa2B4d84KlRXc4smw== 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=jXAvCYxZ; 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 DBF2D606E660; Fri, 13 Nov 2026 17:19:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=jXAvCYxZ Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87DCD1F000C4; Fri, 13 Nov 2026 17:19:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794590386; bh=do8S9UoAkrAwKTpO5e2BtehQ8aqJJKBAukRrhO7xZUA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=jXAvCYxZK+/vOfIAElvzMgsL4zEmPm9wtQeQF/KtoJvjrtJAeTw5zxs/Dfz/ossgE xmbN555zLXewj+3QEqeU5wlEUGLK/vd18jfl8u2ZFXPSVK6xv4lnOsHpzgvsyw3MYh wyemG0E3OPUrSdQVVyqspelWyiFcd/EnvaLj5joc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Daejun Park , Christoph Hellwig , Pankaj Raghav , Carlos Maiolino , Sasha Levin Subject: [PATCH 6.18 356/686] xfs: clamp a pNFS LAYOUTCOMMIT extent before computing its end Date: Fri, 13 Nov 2026 10:48:09 -0500 Message-ID: <20261113153832.976039945@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261113153820.902362109@linuxfoundation.org> References: <20261113153820.902362109@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org 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: Daejun Park [ Upstream commit d8c2bc88460f89e543ab3af622fc8f34c7011d71 ] xfs_fs_commit_blocks() adds the client's length to the offset before it clamps the end to the file size. A large length wraps the sum and reaches xfs_iomap_write_unwritten() unclamped. With the previous two patches the LAYOUTCOMMIT then fails with -EIO and converts nothing. Clamp the length first. Fixes: 527851124d10 ("xfs: implement pNFS export operations") Cc: stable@vger.kernel.org Signed-off-by: Daejun Park Reviewed-by: Christoph Hellwig Reviewed-by: Pankaj Raghav Signed-off-by: Carlos Maiolino Signed-off-by: Sasha Levin --- fs/xfs/xfs_pnfs.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c index ef08f0f619f70..b880d061ee90c 100644 --- a/fs/xfs/xfs_pnfs.c +++ b/fs/xfs/xfs_pnfs.c @@ -311,9 +311,7 @@ xfs_fs_commit_blocks( if (start > size) continue; - end = start + maps[i].length; - if (end > size) - end = size; + end = start + min_t(u64, maps[i].length, size - start); length = end - start; if (!length) -- 2.53.0