From patchwork Thu May 18 18:05:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maciej Fijalkowski X-Patchwork-Id: 13247226 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 0CF44134A3; Thu, 18 May 2023 18:06:18 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00054C2; Thu, 18 May 2023 11:06:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1684433177; x=1715969177; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EsUcyGLX/1e3p/Xfu/7Y1Zlz4JefwYwv/uRem1HNiiE=; b=SN9lovzri7w6hRKyRKq83fnpVZnEQU07Tulct4aoOusHDJi4M40PVPAf SpIMUBAx7nMpwNCB8leoV5spFMKjZeWztUDKdi6cfwZDUX6kSiI1S1hX3 +T1E7G/B0C9uN1+/428OcVzEsQmdXLa9vnZf+Fk+96jBabq3KTSKAn6mV +8VQ3QnHsVOMnCmV1l0FAEL6H8eAauEeajovfeJ5s57fb0WdHPYAOzzMt pGpQ8RR75LLhcUNfYrvb9Vwo6EMqXhpMD+meDzyD9XktAfdzSRzg4KRV9 9jRyn8hVPcIh0KxUumm49c4TYdblCZcExHeTewkQzPPrlGeRYUfNZ6AnM g==; X-IronPort-AV: E=McAfee;i="6600,9927,10714"; a="350984862" X-IronPort-AV: E=Sophos;i="6.00,174,1681196400"; d="scan'208";a="350984862" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2023 11:06:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10714"; a="948780320" X-IronPort-AV: E=Sophos;i="6.00,174,1681196400"; d="scan'208";a="948780320" Received: from boxer.igk.intel.com ([10.102.20.173]) by fmsmga006.fm.intel.com with ESMTP; 18 May 2023 11:06:14 -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, tirthendu.sarkar@intel.com, maciej.fijalkowski@intel.com, bjorn@kernel.org Subject: [PATCH bpf-next 09/21] xsk: discard zero length descriptors in Tx path Date: Thu, 18 May 2023 20:05:33 +0200 Message-Id: <20230518180545.159100-10-maciej.fijalkowski@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230518180545.159100-1-maciej.fijalkowski@intel.com> References: <20230518180545.159100-1-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;