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 A46D615AD5 for ; Mon, 26 Jun 2023 21:50:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51950C433C9; Mon, 26 Jun 2023 21:50:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1687816259; bh=+Razs3xOyela9ENjzt3Ds9vXAXb3roZYjUTUVbY8YvI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kzyEtvMniTL4rCbAxyRT3oYtWDJd50jRvC/UWWKaGY4HXz4foFQzplillcLBvHoS+ G1MYj6qPjAs9Rq0rNlTPhsspNb0rhoGalT/g0SZhzI4/6WdHGrgtl0vQQKsp9rBr/h TLygKgliwJ2WwUwuyGWuLMmZnaWVJxHi49gUT7GvQVzxgHv5a6ILssmKTD/+CaWvBH wUT4AC5/ljMYoLQrZEuMWMT3TE5uCwNHRLwsDiafNbCvPyYY1/9Nlos7h9kjOWzbII iVyhwy5xc7Cq9OfUQout8GVGeEn2O6ooBH0TRDq56NFJTDPcTM7OAY4tfIohKdiTr1 Q/sVB3jGc6+zQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: David Christensen , Sridhar Samudrala , "David S . Miller" , Sasha Levin , aelior@marvell.com, skalluru@marvell.com, manishc@marvell.com, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 2/9] bnx2x: fix page fault following EEH recovery Date: Mon, 26 Jun 2023 17:50:50 -0400 Message-Id: <20230626215057.179363-2-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230626215057.179363-1-sashal@kernel.org> References: <20230626215057.179363-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.118 Content-Transfer-Encoding: 8bit From: David Christensen [ Upstream commit 7ebe4eda4265642859507d1b3ca330d8c196cfe5 ] In the last step of the EEH recovery process, the EEH driver calls into bnx2x_io_resume() to re-initialize the NIC hardware via the function bnx2x_nic_load(). If an error occurs during bnx2x_nic_load(), OS and hardware resources are released and an error code is returned to the caller. When called from bnx2x_io_resume(), the return code is ignored and the network interface is brought up unconditionally. Later attempts to send a packet via this interface result in a page fault due to a null pointer reference. This patch checks the return code of bnx2x_nic_load(), prints an error message if necessary, and does not enable the interface. Signed-off-by: David Christensen Reviewed-by: Sridhar Samudrala Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c index 553f3de939574..9c26c46771f5e 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c @@ -14317,11 +14317,16 @@ static void bnx2x_io_resume(struct pci_dev *pdev) bp->fw_seq = SHMEM_RD(bp, func_mb[BP_FW_MB_IDX(bp)].drv_mb_header) & DRV_MSG_SEQ_NUMBER_MASK; - if (netif_running(dev)) - bnx2x_nic_load(bp, LOAD_NORMAL); + if (netif_running(dev)) { + if (bnx2x_nic_load(bp, LOAD_NORMAL)) { + netdev_err(bp->dev, "Error during driver initialization, try unloading/reloading the driver\n"); + goto done; + } + } netif_device_attach(dev); +done: rtnl_unlock(); } -- 2.39.2