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[128.93.82.131]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-48722c6b4d0sm281883215e9.3.2026.03.30.08.43.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Mar 2026 08:43:27 -0700 (PDT) From: Thomas Fourier To: Cc: Thomas Fourier , stable@vger.kernel.org, Marc Kleine-Budde , Vincent Mailhol , Wolfgang Grandegger , "David S. Miller" , linux-can@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net] can: sja1000: Fix pci_iounmap() buffer Date: Mon, 30 Mar 2026 17:42:31 +0200 Message-ID: <20260330154236.98665-2-fourier.thomas@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The base_addr is mapped in kvaser_pci_init_one() and the pointer is copied to priv->reg_base in kvaser_pci_add_chan() with offset channel * KVASER_PCI_PORT_BYTES but unmapped without the offset. Cancel the offset before calling pci_iounmap(). Fixes: 255a9154319d ("can: sja1000: stop misusing member base_addr of struct net_device") Cc: Signed-off-by: Thomas Fourier --- drivers/net/can/sja1000/kvaser_pci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/sja1000/kvaser_pci.c b/drivers/net/can/sja1000/kvaser_pci.c index 95fe9ee1ce32..213fd0eb07e7 100644 --- a/drivers/net/can/sja1000/kvaser_pci.c +++ b/drivers/net/can/sja1000/kvaser_pci.c @@ -161,6 +161,7 @@ static void kvaser_pci_del_chan(struct net_device *dev) { struct sja1000_priv *priv; struct kvaser_pci *board; + void __iomem *base_addr; int i; if (!dev) @@ -186,7 +187,8 @@ static void kvaser_pci_del_chan(struct net_device *dev) } unregister_sja1000dev(dev); - pci_iounmap(board->pci_dev, priv->reg_base); + base_addr = priv->reg_base - board->channel * KVASER_PCI_PORT_BYTES; + pci_iounmap(board->pci_dev, base_addr); pci_iounmap(board->pci_dev, board->conf_addr); pci_iounmap(board->pci_dev, board->res_addr); -- 2.43.0