From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk2-f12.google.com (mail-qk2-f12.google.com [74.125.230.204]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ECD613446C5 for ; Thu, 10 Sep 2026 23:14:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.230.204 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789082049; cv=none; b=lvxgr1flz5C17UZxBJrMbnFRoBPvGuWhPXq9V7wzeVp4Ggx7tMkbk315icCoPRVoylW+Gz4giflOAcO9y5dD3xmtibmohmvJhq55aB/UjBjTZ3UkreavofT3htATLu3d4gVtXD/2Kf+sKhwYAC0TTnO/I+4jCXm606oJj0wgokc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789082049; c=relaxed/simple; bh=ImMK4mcH1Y1VoDsvqq+9Jdwp821vUOZvfhYMZ2UEkuw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=s6V4yrymx/Zw0sy1sRrzKUA9llb/quLQWpbztR1TMg8PiSdqCKasLC/+PAx8kx9t79p9WOO/2rT7TWR9WkglJWfjh3M8pd5SC6nM1v1MMRok9aCzadA6yLLIEUx3gNtZzTy02U9RgfTNf8/9kRvG+RrQoCDK2mSuYx6tEOMyrv4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=MhiUD1k3; arc=none smtp.client-ip=74.125.230.204 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MhiUD1k3" Received: by mail-qk2-f12.google.com with SMTP id d75a77b69052e-52fb76ef1d0so4048151cf.0 for ; Thu, 10 Sep 2026 16:14:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1789082047; x=1789686847; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=kocMm2XO+eODS6jg8KDsoCI9b/NcjZhZ8Qzw5ERTUwQ=; b=MhiUD1k3dto3IznuBEFveN7ehjP3ugJyCSiuZjE07myFuvlbb0foPugN499J6/kXrz 28Uin+QC9ZmlpWfrZQZpyq8y7cTNgYS5GrlbHT4qbbbKHbEYSWfBYHMpAfTEl+qbZole U4JA2q7M6pKXWGNKbx/d5i3pANoe6WkZqixkK3i60GI7Qub7mmD5JpxtwW5YBnflw7Q7 U5miC6mNzTYruS7ListdCV4xpkASHVsFooJ1dVSiHV6236G1Pu0wrvKC0UtgR/0PFtqZ SrwSGPHbkfrSyEcv7IkXzp6rPahcWQbcRiYp7IsmHws9+l02hl0z8A37ma6SqVnOEF+V Pg5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1789082047; x=1789686847; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=kocMm2XO+eODS6jg8KDsoCI9b/NcjZhZ8Qzw5ERTUwQ=; b=VmbY8JT2mMpmL8MElW9WgjqNLl0fXfY2n+ZSNrAUw8zRR3wBYc42ywkAV+lmufAtbt pxgoDZhwkBf5LksRUmP/EMdymTTFEF2wzuQcklG3Heaz4IfNcYjdQ6CgExQAKiif5eFo XiKy94F3wMzAGP1L2gASlIhalo3IOsJyN4HzbrIRXZ9+s6zrQuRrQYX/YP8QbRcsPFZf 6dSSULQDchGo6qHenbk9ab+z+p9BT6vA8JPSEJZw44S1dUQ+mx/5zetM7LQ6HoUqkjf0 BmQ9+OzN5RWP/K8Ncjzl96+VZGhSQvJxIHat2YEXpd202CpjQLE5jtm0NCXfM/vhXI7C w0Uw== X-Forwarded-Encrypted: i=1; AKwUvBwb+vELI1IuzHZvOLjq9F+0zcQNX0/wcZGQxrp6jX7bi28MbQfhv/8DQouO2+LfZQRsXAxIfMxVOWA7Qmk=@vger.kernel.org X-Gm-Message-State: AFuF++mwTlmyVTBfUG3hrqXEvIRw7fNizgsgYr5aMW/jjFFgZG2zVn8X zTRCMcR2y6OwzW0hYg3xfX6llQJ+P62Eh8B4kb1R6V2pJsdfII6xZvk= X-Gm-Gg: AYBFou2SCndfHOf9dvRZYmkZXdCJPbtDU+1tg8ZUdjTveghX2SEc5V41CeMT1NO7qj7 yQnu43BY9KRp+a7NgANXvEkr1/W9pQJy1zmVunZEk++UcC5Ufl2ngfwD0qfERZaMe/dVnfOADkG 7PqVvhZt1lRlDEFTqTlXaBnYdL2BzjtTnwtu6WxUNuJaDUnXCku+L86DDnQrR11P5HKYc9+yVMf W0gGxjm3KEv5z1pgdOboVexWVBL9uYx9CEbmC9eKneh7FgOBD0oQJJe/rT92GjyHbojHf1RugN8 cl5ZCZZSZCTBCsQcBBLVrrFlxE+8mcHsdGg+Njq4Ct5chPf17TPZnkNjxVJe2HxEuqbdMaQ+/Yg guz4RW+L57NlpCpa389rvOYYA0svggxY4OvdSrLeYXpE+5VbhXBvUGFkaGn15Hgb67OAmaVPyXt 2WRzxSIgG+eR4v0Gz9qf33P0rSvc3hdfKOWhppxbGnXEPvrswV1G1HjcKs+6n5R3ZKsNbpjPwTC rNwr0MouvpqBHvsLLRs1kkVznxjsoubbHGk5X8ZQ+FizpTq3fOlyqSxaejQO2sRQNrXfLE3B24j 3HzVCQ5XF6/9C2Y0l9aCjFfVSdjD0KxcdQ== X-Received: by 2002:a05:622a:390:b0:530:9c9e:d9e7 with SMTP id d75a77b69052e-530c85293aemr28082171cf.5.1789082046602; Thu, 10 Sep 2026 16:14:06 -0700 (PDT) Received: from localhost.localdomain ([104.39.73.78]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-530ca103b90sm5778121cf.0.2026.09.10.16.14.05 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 10 Sep 2026 16:14:05 -0700 (PDT) From: Myeonghun Pak To: Dominik Brodowski Cc: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Myeonghun Pak , Ijae Kim Subject: [PATCH v2] net: 8390: pcnet_cs: release PCMCIA window on setup_shmem_window() error Date: Thu, 10 Sep 2026 19:14:00 -0400 Message-ID: <20260910231400.31919-1-mhun512@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260731161740.44955-1-mhun512@gmail.com> References: <20260731161740.44955-1-mhun512@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit setup_shmem_window() acquires a PCMCIA memory window using pcmcia_request_window(). If pcmcia_map_mem_page() or the subsequent ioremap() fails, the function returns without releasing the requested window. pcnet_config() treats shared-memory setup failure as non-fatal and falls back to setup_dma_config(). Probe can therefore continue while socket window 3 and its reserved iomem range remain unnecessarily held for the rest of the bound lifetime of the device. pcmcia_disable_device() eventually releases the window during teardown. Route error paths after a successful request through a new release label that calls pcmcia_release_window(). Fold the existing buffer-verification cleanup into the same path, keeping iounmap() before the window release when a mapping exists. Leave the request failure path unchanged. This issue was identified during our ongoing static-analysis research while reviewing kernel code. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Assisted-by: OpenAI:GPT-5.6 Co-developed-by: Ijae Kim Signed-off-by: Ijae Kim Signed-off-by: Myeonghun Pak --- Changes in v2: - Clarify that the window remains reserved only until device teardown. - Make the DMA fallback and continued probe description conditional. - Avoid claiming that every request failure leaves no resource held. - Restore the surrounding indentation for the new goto statements. Link: https://lore.kernel.org/netdev/20260731161740.44955-1-mhun512@gmail.com/ --- drivers/net/ethernet/8390/pcnet_cs.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/8390/pcnet_cs.c b/drivers/net/ethernet/8390/pcnet_cs.c index 19f9c5db3..0cf3c0f3c 100644 --- a/drivers/net/ethernet/8390/pcnet_cs.c +++ b/drivers/net/ethernet/8390/pcnet_cs.c @@ -1434,14 +1434,14 @@ static int setup_shmem_window(struct pcmcia_device *link, int start_pg, offset -= offset % window_size; ret = pcmcia_map_mem_page(link, link->resource[3], offset); if (ret) - goto failed; + goto release; /* Try scribbling on the buffer */ info->base = ioremap(link->resource[3]->start, resource_size(link->resource[3])); if (unlikely(!info->base)) { ret = -ENOMEM; - goto failed; + goto release; } for (i = 0; i < (TX_PAGES<<8); i += 2) @@ -1452,9 +1452,8 @@ static int setup_shmem_window(struct pcmcia_device *link, int start_pg, pcnet_reset_8390(dev); if (i != (TX_PAGES<<8)) { iounmap(info->base); - pcmcia_release_window(link, link->resource[3]); info->base = NULL; - goto failed; + goto release; } ei_status.mem = info->base + offset; @@ -1475,6 +1474,8 @@ static int setup_shmem_window(struct pcmcia_device *link, int start_pg, info->flags |= USE_SHMEM; return 0; +release: + pcmcia_release_window(link, link->resource[3]); failed: return 1; } -- 2.47.1