From nobody Mon Feb 9 15:55:19 2026 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.4]) (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 89A0914A8E; Tue, 23 Dec 2025 03:43:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.4 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766461434; cv=none; b=bTHnsCLBe3VOFo8UlRlkcu7dA6Yigg2xa6u4FjiSd8Wx5qOHJrznDAxNZe+4Ck53aoOY137MBMWbs4ctqUAAySmkANIW3c+EcxHoI885G2kYD7oKWjTmhsrvpvliw9M9N7GEAh5RH7gM0I48eMAzpN6H+65M8zPTZl/WaHZtZiM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766461434; c=relaxed/simple; bh=wM68gCTTBChGaY+DkQVynzOks2Mwpoyw904gPRScWyA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QE7RaLEIwm3KEKSqYI7d0aJTA7eaLCkmoqHUl2HvYpoZuZW1nbOIjWgEGa5l5byamnZbnQkB3F3cWEVLdsszkSNdBTfVHBTKuzQBJlTICgVEVHcPGZpLZNpRNBPJzVPQh3RqXV4zic6nBmXY9pMTHzKK8XBO8++oyIXSaXfXAOE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=VAEZIdTE; arc=none smtp.client-ip=220.197.31.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="VAEZIdTE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=pE o0jKxFQMzyXleF0oKRWXlp3a7risG17txZoqwq2NA=; b=VAEZIdTE5wi8yFD1Hi AHH78Mv1pRXR2fjVY/OY+YDa1L7CH9dCTsPk1N94xOqn1UJ7k25cm6PUTU0fExhy 2Qo/te0f6DLG0lSzU7skvqE2C21XE/IEQSeboIxr1E6lz0wsV+LUMBHRjv9kcjUe Yu9jFq74+ZkAMnn36BG1Oh7AA= Received: from localhost (unknown []) by gzga-smtp-mtada-g0-4 (Coremail) with SMTP id _____wCn7XjhD0ppaIHRBw--.35778S2; Tue, 23 Dec 2025 11:43:31 +0800 (CST) From: Honggang LI To: jinpu.wang@ionos.com, danil.kipnis@cloud.ionos.com Cc: jgg@ziepe.ca, leon@kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Honggang LI Subject: [PATCH] RDMA/rtrs: client: Fix clt_path::max_pages_per_mr calculation Date: Tue, 23 Dec 2025 11:43:24 +0800 Message-ID: <20251223034324.13706-1-honggangli@163.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wCn7XjhD0ppaIHRBw--.35778S2 X-Coremail-Antispam: 1Uf129KBjvJXoWrtF4UJFyUKF4xXw1fCF45Jrb_yoW8JF18pF WfAryvvw1UJF4jy3Z2v34kur15CanrArW8Wr92v34kXFnaq342qFyqkw1UXryDJr1DXrW3 tr4UZr4DKa4xuw7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pRO4S8UUUUU= X-CM-SenderInfo: 5krqwwxdqjzxi6rwjhhfrp/xtbC6wPoLmlKD+MTuAAA3K Content-Type: text/plain; charset="utf-8" If the low two bytes of ib_dev::attrs::max_mr_size are zeros, the `min3` function will set clt_path::max_pages_per_mr to zero. `alloc_path_reqs` will pass zero, which is invalid, as the third parameter to `ib_alloc_mr`. Fixes: 6a98d71daea1 ("RDMA/rtrs: client: main functionality") Signed-off-by: Honggang LI --- drivers/infiniband/ulp/rtrs/rtrs-clt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ul= p/rtrs/rtrs-clt.c index 71387811b281..b9d66e4fab07 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c @@ -1465,7 +1465,7 @@ static void query_fast_reg_mode(struct rtrs_clt_path = *clt_path) max_pages_per_mr =3D ib_dev->attrs.max_mr_size; do_div(max_pages_per_mr, (1ull << mr_page_shift)); clt_path->max_pages_per_mr =3D - min3(clt_path->max_pages_per_mr, (u32)max_pages_per_mr, + min(min_not_zero(clt_path->max_pages_per_mr, (u32)max_pages_per_mr), ib_dev->attrs.max_fast_reg_page_list_len); clt_path->clt->max_segments =3D min(clt_path->max_pages_per_mr, clt_path->clt->max_segments); --=20 2.52.0