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 B705C3D2FEB; Thu, 15 Jan 2026 17:29:32 +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=1768498172; cv=none; b=ZeR3TA7FzVnQvAM/n+5pHg/PQC3nIvXIgXgehR5ZX9msch9OQchZlu1qBgNcJv/dR0kIeNZA4a49Y5qWYqnnp00refEqYgE4uYHxjCnXUJkw5FJoCzkMK7u30rksjCq42604nID2yJCUltJq4UMW5ycLKOUM9E8PhaIVx7HC4DY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498172; c=relaxed/simple; bh=gHC3pOEu51I9x3Sfrz7oR7+MXY7JIrXF4UQUxf7wI88=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aKwYxjneGEw+yQmQnS+5wFjM2OxCpUp6BqyprIKLFHEJkfEij+0pCe7Sa1EoyiUFCkxHC4xk4S+Z+C3DFp+4cBw9cGHrdBT2fP6xssG1bL06umBwIJUwWndHzh71BIodEGmEIBlrtzMAQ+9pQ9EqJjE6UXKOrbC5o6lDlHk1XTM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FLh2yuZ9; 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="FLh2yuZ9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 443BBC116D0; Thu, 15 Jan 2026 17:29:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768498172; bh=gHC3pOEu51I9x3Sfrz7oR7+MXY7JIrXF4UQUxf7wI88=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FLh2yuZ9RyxB350JI6xmcJu2s0PWEFGjopXfLXsGYJqM58shKJhQApnWb5HwO/N1s VkHMlJp6nzHlI6vmrtjImoRfOhGzNgSwjHaq7iwzN8uVoPs1YD2bNss3aGzqm+JXBS JW8PCrgbjITbEEa7oAGpel4BvTItSDZjDdHRA21o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Gregory Herrero , Rafal Romanowski , Aleksandr Loktionov , Tony Nguyen , Sasha Levin Subject: [PATCH 5.15 338/554] i40e: validate ring_len parameter against hardware-specific values Date: Thu, 15 Jan 2026 17:46:44 +0100 Message-ID: <20260115164258.466750493@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Gregory Herrero [ Upstream commit 69942834215323cd9131db557091b4dec43f19c5 ] The maximum number of descriptors supported by the hardware is hardware-dependent and can be retrieved using i40e_get_max_num_descriptors(). Move this function to a shared header and use it when checking for valid ring_len parameter rather than using hardcoded value. By fixing an over-acceptance issue, behavior change could be seen where ring_len could now be rejected while configuring rx and tx queues if its size is larger than the hardware-dependent maximum number of descriptors. Fixes: 55d225670def ("i40e: add validation for ring_len param") Signed-off-by: Gregory Herrero Tested-by: Rafal Romanowski Reviewed-by: Aleksandr Loktionov Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/i40e/i40e.h | 11 +++++++++++ drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 12 ------------ drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 4 ++-- 3 files changed, 13 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index bbd95b3d7326..022bf6e86164 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -1305,4 +1305,15 @@ static inline u32 i40e_is_tc_mqprio_enabled(struct i40e_pf *pf) return pf->flags & I40E_FLAG_TC_MQPRIO; } +static inline u32 i40e_get_max_num_descriptors(const struct i40e_pf *pf) +{ + const struct i40e_hw *hw = &pf->hw; + + switch (hw->mac.type) { + case I40E_MAC_XL710: + return I40E_MAX_NUM_DESCRIPTORS_XL710; + default: + return I40E_MAX_NUM_DESCRIPTORS; + } +} #endif /* _I40E_H_ */ diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c index 74a18b8df11f..04d304eef379 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c +++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c @@ -1918,18 +1918,6 @@ static void i40e_get_drvinfo(struct net_device *netdev, drvinfo->n_priv_flags += I40E_GL_PRIV_FLAGS_STR_LEN; } -static u32 i40e_get_max_num_descriptors(struct i40e_pf *pf) -{ - struct i40e_hw *hw = &pf->hw; - - switch (hw->mac.type) { - case I40E_MAC_XL710: - return I40E_MAX_NUM_DESCRIPTORS_XL710; - default: - return I40E_MAX_NUM_DESCRIPTORS; - } -} - static void i40e_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring) { diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index 5cd7a2bc40fd..907727604c70 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -656,7 +656,7 @@ static int i40e_config_vsi_tx_queue(struct i40e_vf *vf, u16 vsi_id, /* ring_len has to be multiple of 8 */ if (!IS_ALIGNED(info->ring_len, 8) || - info->ring_len > I40E_MAX_NUM_DESCRIPTORS_XL710) { + info->ring_len > i40e_get_max_num_descriptors(pf)) { ret = -EINVAL; goto error_context; } @@ -728,7 +728,7 @@ static int i40e_config_vsi_rx_queue(struct i40e_vf *vf, u16 vsi_id, /* ring_len has to be multiple of 32 */ if (!IS_ALIGNED(info->ring_len, 32) || - info->ring_len > I40E_MAX_NUM_DESCRIPTORS_XL710) { + info->ring_len > i40e_get_max_num_descriptors(pf)) { ret = -EINVAL; goto error_param; } -- 2.51.0