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 B7B5334F49D; Tue, 26 Aug 2025 13:51:00 +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=1756216260; cv=none; b=szdZsdcQ21w3wZKfUchgobmU54hnImNwZ3m0AWUMwedLqmTDzYS0+IzNa3HwEofs/eXFDW+ZQwB1MQaH2gPtf7akoc9x/xKFXKmzl3W7DZsmBjX3P1OHwfec5yCcmIl50bj+dCKmmAs+sC7I8ukfTrjDX8PwkCQ25pApEd5anOA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756216260; c=relaxed/simple; bh=fuaXNmrn2483jiKLkv1Rz9yQ+DzKd4BYGxCLg4Rz3c0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qiq3a1+HDnWSA+/WGvAMNr6YoMgJLChQn71MPh8Maa0fcMXUGX2LB7Ehsqm0DxsTSn03B47XI5zJydoQNtwYfPJlIeONKO7NEBSFGgEn8KToCVbt87vA9I+/aIKdz3xugObZ7KlJ2GQj2WcDlIipgsghipfYLrbNraHU8SrxaYA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GBgCFuwh; 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="GBgCFuwh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A981C4CEF1; Tue, 26 Aug 2025 13:51:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756216260; bh=fuaXNmrn2483jiKLkv1Rz9yQ+DzKd4BYGxCLg4Rz3c0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GBgCFuwhRvL7eAg2mj01XkKAJ3BYDsdKD4bwOZSWNrRlf0iKIwRYtbP0+n+IQzGEJ Z1wEZ/Qsp889Ln6k0ceMtgHqLXtaqRMM/gaWW+4RvbElqqWUVExOIlU+jyR0YvKYBZ OsqVsYUI0mPFINfilN9pP8Uu31P7Qt+r6YzAVUJk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Fourier , Mark Einon , Simon Horman , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.15 342/644] et131x: Add missing check after DMA map Date: Tue, 26 Aug 2025 13:07:13 +0200 Message-ID: <20250826110954.867159130@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Thomas Fourier [ Upstream commit d61f6cb6f6ef3c70d2ccc0d9c85c508cb8017da9 ] The DMA map functions can fail and should be tested for errors. If the mapping fails, unmap and return an error. Signed-off-by: Thomas Fourier Acked-by: Mark Einon Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250716094733.28734-2-fourier.thomas@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/agere/et131x.c | 36 +++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/net/ethernet/agere/et131x.c b/drivers/net/ethernet/agere/et131x.c index f4edc616388c..1869c0635e56 100644 --- a/drivers/net/ethernet/agere/et131x.c +++ b/drivers/net/ethernet/agere/et131x.c @@ -2460,6 +2460,10 @@ static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb) skb->data, skb_headlen(skb), DMA_TO_DEVICE); + if (dma_mapping_error(&adapter->pdev->dev, + dma_addr)) + return -ENOMEM; + desc[frag].addr_lo = lower_32_bits(dma_addr); desc[frag].addr_hi = upper_32_bits(dma_addr); frag++; @@ -2469,6 +2473,10 @@ static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb) skb->data, skb_headlen(skb) / 2, DMA_TO_DEVICE); + if (dma_mapping_error(&adapter->pdev->dev, + dma_addr)) + return -ENOMEM; + desc[frag].addr_lo = lower_32_bits(dma_addr); desc[frag].addr_hi = upper_32_bits(dma_addr); frag++; @@ -2479,6 +2487,10 @@ static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb) skb_headlen(skb) / 2, skb_headlen(skb) / 2, DMA_TO_DEVICE); + if (dma_mapping_error(&adapter->pdev->dev, + dma_addr)) + goto unmap_first_out; + desc[frag].addr_lo = lower_32_bits(dma_addr); desc[frag].addr_hi = upper_32_bits(dma_addr); frag++; @@ -2490,6 +2502,9 @@ static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb) 0, desc[frag].len_vlan, DMA_TO_DEVICE); + if (dma_mapping_error(&adapter->pdev->dev, dma_addr)) + goto unmap_out; + desc[frag].addr_lo = lower_32_bits(dma_addr); desc[frag].addr_hi = upper_32_bits(dma_addr); frag++; @@ -2579,6 +2594,27 @@ static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb) &adapter->regs->global.watchdog_timer); } return 0; + +unmap_out: + // Unmap the body of the packet with map_page + while (--i) { + frag--; + dma_addr = desc[frag].addr_lo; + dma_addr |= (u64)desc[frag].addr_hi << 32; + dma_unmap_page(&adapter->pdev->dev, dma_addr, + desc[frag].len_vlan, DMA_TO_DEVICE); + } + +unmap_first_out: + // Unmap the header with map_single + while (frag--) { + dma_addr = desc[frag].addr_lo; + dma_addr |= (u64)desc[frag].addr_hi << 32; + dma_unmap_single(&adapter->pdev->dev, dma_addr, + desc[frag].len_vlan, DMA_TO_DEVICE); + } + + return -ENOMEM; } static int send_packet(struct sk_buff *skb, struct et131x_adapter *adapter) -- 2.39.5