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 32D68335BCD; Fri, 9 Jan 2026 12:44:03 +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=1767962643; cv=none; b=TLpN48EqUoxra/PWcoWoQe8JQa4nAh3AnAq/NtN/xbYx0SSy9IeSiS9cPlaaxs8lu5+OkQyfYs99rXpd34a3RjE7EEItcKr3NQbAZBUeKthGm7P/mN5VVq2LYCtZE+R9q8U27iVKgveMCIUY83WYZRestaJDroy6dDCKlAsBVAk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767962643; c=relaxed/simple; bh=ZftGsgRNAPAGNTEGYOFpd9AyJolWjDY3hsnCmXBNTls=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sTTBij8lXV+5RA9QzGX1FBoxFy+RqVGHgs6mLCg5lGvOJxNOk2X5uQ0H1pzDp3Y+qg2HwYijjJxEhPE/Gf+6bzi+vbxW5Bk921hC5kFcX3VNYQZSBEP2AcuR/K3DdVsFD9cm0CmOXcfvCG5mvU/zetz84Mco8usDErZa/5mfkIY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=r78hMEDW; 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="r78hMEDW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B24F7C4CEF1; Fri, 9 Jan 2026 12:44:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767962643; bh=ZftGsgRNAPAGNTEGYOFpd9AyJolWjDY3hsnCmXBNTls=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r78hMEDWYOwm/EsILHVpR0KioVZ15gmwdGyfkO0Aqp1pkk5d1oicZ3MuBvW2MEeOe A0rq9jOB7FTeowhkSKvPHf/LXS1yuqIhg5XmJ/VoyNcZttckspU4jrwzjHvW8PoeWA djlgX21ko5EIwmo3pXF94aT18/j7h0gWeVJUvXmw= 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 6.1 437/634] RDMA/rtrs: Fix clt_path::max_pages_per_mr calculation Date: Fri, 9 Jan 2026 12:41:55 +0100 Message-ID: <20260109112133.985209456@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112117.407257400@linuxfoundation.org> References: <20260109112117.407257400@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 6.1-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 dac8ddfc89e7..7c81452d73cf 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c @@ -1465,6 +1465,7 @@ 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