From patchwork Mon Jun 5 14:44:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Fijalkowski, Maciej" X-Patchwork-Id: 13267426 X-Patchwork-Delegate: bpf@iogearbox.net Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 42A1B21064; Mon, 5 Jun 2023 14:45:22 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8979D9C; Mon, 5 Jun 2023 07:45:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685976320; x=1717512320; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EsUcyGLX/1e3p/Xfu/7Y1Zlz4JefwYwv/uRem1HNiiE=; b=Omk04OU/+85e+TJGWW1meYkitSCeV+nAw+aeeV016q/Bke3B6H8XQoAU IQV4nvxpaxGiw33BK1GKpIVQwxBvi/mGVAvUllxMCu0XUOhsLHlCu0doM dNKhJ9p4mToHEKRcGaVC4qir2ksYNGOgab54kzUq5/j9KYJYQ3xZ5vrDO 3FuWsUihnqmFFZs6w9GEa690tpAeRLbF/sz6oIARjTHIzAsIagufJA7OW DqCh9lhSJenCaDZrORwKeJVjchEIKu79J7GCy/H04OpUAPBY7T4mlC8Mt xzqwCELFGcdsR7vn4HK0qG9EocKIP3BHlZd8EpQZ9ZrujBv+fOK+6rp8I Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10732"; a="442757910" X-IronPort-AV: E=Sophos;i="6.00,217,1681196400"; d="scan'208";a="442757910" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jun 2023 07:45:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10732"; a="798464225" X-IronPort-AV: E=Sophos;i="6.00,217,1681196400"; d="scan'208";a="798464225" Received: from boxer.igk.intel.com ([10.102.20.173]) by FMSMGA003.fm.intel.com with ESMTP; 05 Jun 2023 07:45:17 -0700 From: Maciej Fijalkowski To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org Cc: netdev@vger.kernel.org, magnus.karlsson@intel.com, bjorn@kernel.org, tirthendu.sarkar@intel.com, maciej.fijalkowski@intel.com, simon.horman@corigine.com Subject: [PATCH v3 bpf-next 09/22] xsk: discard zero length descriptors in Tx path Date: Mon, 5 Jun 2023 16:44:20 +0200 Message-Id: <20230605144433.290114-10-maciej.fijalkowski@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230605144433.290114-1-maciej.fijalkowski@intel.com> References: <20230605144433.290114-1-maciej.fijalkowski@intel.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: bpf@iogearbox.net From: Tirthendu Sarkar Descriptors with zero length are not supported by many NICs. To preserve uniform behavior discard any zero length desc as invvalid desc. Signed-off-by: Tirthendu Sarkar Signed-off-by: Maciej Fijalkowski --- net/xdp/xsk_queue.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h index 2d2af9fc2744..ab0d13d6d90e 100644 --- a/net/xdp/xsk_queue.h +++ b/net/xdp/xsk_queue.h @@ -140,6 +140,9 @@ static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool, { u64 offset = desc->addr & (pool->chunk_size - 1); + if (!desc->len) + return false; + if (offset + desc->len > pool->chunk_size) return false; @@ -156,6 +159,9 @@ static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *pool, { u64 addr = xp_unaligned_add_offset_to_addr(desc->addr); + if (!desc->len) + return false; + if (desc->len > pool->chunk_size) return false;