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=1794591170; b=LfCAyK+ZUBSyx7MPEmBq6lJhDrFJLSjnRUH8e0I1niUC56RO+2s5iX7qXk9nfJq5o/E6 zjhs0Zl5YTT+QPz/+fpZIRf1T8pT565V74d+5BZGj/Vx1o+OGH1d9hGYPaJ5G5RAkGsmz GGJ8lJgkesCrzmLx2+4phKVGRtXUhLWEx3izCdTaQ/tpblIVGvCNfcykEk2EevIXAIaZU e2NNzpCp5m8/WLDNfxvbEXpCUToWXBFZ6v0WjmjGCqSY5m/6LvAqK4cIErHn6pTyopOMr RlBGS1siT97m5hFEFLzK1VKM8lBY4Tq0kq/2fcQMzbSAvCZb98CRody5oxVVDIZcXtA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794591170; 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=bGH3eEcTiP+3aT8/s19ltJ7j1gq9Zg8mCtWt/q58cqA=; b=NCvb2Wd1IKMnKWfdotUueRFC5XWbNQDjeJCm4AHXSks0u5s11DbGQJvHtSgyjxjNcokA fhQ3JrrVO59cARdYSAk6uxBwnbXj5QqDV7LvJjuE31aS9dEbpolk7AkAd0MzsFdguXNaz He9dhWtJ63ccpdm/8FBuZEXRNAETBYKi7XHuhAQVS1MP9AtGsIyIWM6u+Vs3tMOt0VCiZ XHXgtRAP4jUihJCHZ+K7FTPwqzStLo60GzcYw61QnwVzKrTsNXEKVrPvtmc4nWbhnsJcM mXPDBZkpBQnqcqlf3xYseRytBHKv3rmg+3eLPX6UdnHPdLhxKUV5bRZ15wNMz4PTFew== 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=bJFCAKlm; 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 D1B13606C0BB; Fri, 13 Nov 2026 17:32:50 +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=bJFCAKlm Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7F19C1F000C6; Fri, 13 Nov 2026 17:32:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794591170; bh=bGH3eEcTiP+3aT8/s19ltJ7j1gq9Zg8mCtWt/q58cqA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bJFCAKlmI1Sl5CejUcLrvOxp1lri0LfJEiTH7r1h5A72UUeCBBa/92WtH2zcl1QUe f0755kJPK0MStSsX/N5pR+o101R9i/ShH2TXU1RUf9OTcB2XkTQ+IbeYeD3h0U/euY Lc8YUTmF8v9P0F2P3++aeSVAgsKa4c0/Dzj5Ei20= 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 6.12 311/670] xfs: clamp a pNFS LAYOUTCOMMIT extent before computing its end Date: Fri, 13 Nov 2026 10:47:55 -0500 Message-ID: <20261113153822.448482551@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261113153811.177190860@linuxfoundation.org> References: <20261113153811.177190860@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 6.12-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 ca3d085a3e781..a222410812ac4 100644 --- a/fs/xfs/xfs_pnfs.c +++ b/fs/xfs/xfs_pnfs.c @@ -302,9 +302,7 @@ 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