From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 7118A363C50; Tue, 6 Jan 2026 17:50:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767721837; cv=none; b=KWIaJOJ76BKs1rzfTOd4AGahW8YAMt1Iz4iuAiFf2sqn45MGEbU7nSZeTqes6qY3Gbh7uEjNi2cuXBCxVe5hrIceXYtZOqaS09y65jLJYhXRsGZchMtqWgMXp73xYiobhfM1phl2iq36GSganJ1ZUgicU4bZ9eSg9bLGzg2RQII= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767721837; c=relaxed/simple; bh=+my1UPdPstnaG0Bq/1f+u4LIxMFE+4q1KGeIJlLFdRc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KJent85s7hOw/m5AxfkIyE5U77V6UVdQwZxLpJCLlN8vMIfmoJxTiSVJdAmbuGZotlvszWB4l8x4Uw/IJBHZB6qPJJXk1bWBEZuxMX7YtoFgZOmFzVzINAL7jvyCVHHZ1MrxP96rqGHxTTb9lLxKisbH5Vj77rx4YMBTrjTDvFY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2baXE4Bg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="2baXE4Bg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B418CC116C6; Tue, 6 Jan 2026 17:50:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767721837; bh=+my1UPdPstnaG0Bq/1f+u4LIxMFE+4q1KGeIJlLFdRc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2baXE4BgaOQ83oo/8J4qkOZw28FCyqTF9KY3Sf8Nlb2lnIPmo+OgYcOJRJMNTB5/2 3obb5RmZjHop16B6KxKwoVTdfO8MPsYCv5urjgZkO69hAyiHSCLArzq69iwTa+n+k2 7Uzo0C5v3TL+CuD93N25SnP6jWg8n4TYS+R54HBM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Honggang LI , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.18 085/312] RDMA/rtrs: Fix clt_path::max_pages_per_mr calculation Date: Tue, 6 Jan 2026 18:02:39 +0100 Message-ID: <20260106170550.914113884@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260106170547.832845344@linuxfoundation.org> References: <20260106170547.832845344@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org 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: Honggang LI [ Upstream commit 43bd09d5b750f700499ae8ec45fd41a4c48673e6 ] If device max_mr_size bits in the range [mr_page_shift+31:mr_page_shift] are zero, 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 Link: https://patch.msgid.link/20251229025617.13241-1-honggangli@163.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/ulp/rtrs/rtrs-clt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c index 71387811b281..2b397a544cb9 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c @@ -1464,6 +1464,7 @@ static void query_fast_reg_mode(struct rtrs_clt_path *clt_path) mr_page_shift = max(12, ffs(ib_dev->attrs.page_size_cap) - 1); max_pages_per_mr = ib_dev->attrs.max_mr_size; do_div(max_pages_per_mr, (1ull << mr_page_shift)); + max_pages_per_mr = min_not_zero((u32)max_pages_per_mr, U32_MAX); clt_path->max_pages_per_mr = min3(clt_path->max_pages_per_mr, (u32)max_pages_per_mr, ib_dev->attrs.max_fast_reg_page_list_len); -- 2.51.0