From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794060674; b=MmmGJBrgDUJQ6ri3fUlW0Q7Xp9zZ7vpaAzu/H7Se0Twl219kXQcqRgtX4SW9j5KQGNyl js1SxyHMnUJfjzq50WMqUnB3xHyNYC/58D6kIXEHqR9bi8bFsOLPiyrx/j498DM4yJllX kTh/qfYsqGYfD1iVhsomE+Y+2lKLnNs8ckxrbp/PwBnDo64APUEwVJ6GCEvkcyeEhzV3a ixvLOAp68GgzE251EnYpSlypG54bOHDIL687be8BIOHxJLY7WRjP/pzjsfWnvlNU3QO/r /e9sZnARE7kq1VuBrzlcNrJnF1pEEbsWxRXs4icMWhK6NqPYA/ftueGCinazVUygeUA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794060674; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=YrUVdaSQ2+TPaahr1dL/byLEdSMtj1J1LAzNEU8p9OY=; b=rnuOjgMqtk9CHet/kQjTGqYIGU/7E5pPnHUr7Q3aa0xjB0o0a3631AgFGWE61POdZgyK F2Xsr61mOtDdebnqC7zHUIEx09pfjMJuuKSogbdk3RV7iMrxFp4poday7FX5X4gZU79Ea kx8Zy1Ga6e2KBqmiraSGFaOLQtAF6WWsf6H/bRrybjgCQ5xGQI1aFXuRVJ953NKRwfhLU Z9uutyeQg1r3cVvWUxEFjYVCIvpk4LNLjo6XSe7vMxyCtv1xy/pP5v6Yk39+VXleVxUB7 Gsq9k4DsScCXuoFCfBb1Puk/KAUz/DNa9sNgqruvvsh4MVt/33GlI8lO1RGCKiX4HfA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=h7LD9Or5; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 30661606A326; Sat, 7 Nov 2026 14:11:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=h7LD9Or5 Received: by smtp.kernel.org (Postfix) with ESMTPSA id C77DC1F0089F; Sat, 7 Nov 2026 14:11:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794060674; bh=YrUVdaSQ2+TPaahr1dL/byLEdSMtj1J1LAzNEU8p9OY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=h7LD9Or5Xu3cyYrIl4bwulDuxK85ZmjR8jBSF3c7GIcTY3jRkrMkoO4coAhbA6+3A zBs6lcLPxLqF7pTrGhrAOv4GrQpYm3aXZKlXnRfU6I1hJ45I6GvedNiJEZnZ6iDuwy qHanduHeBrGUnLctulBQAWYADhf0ZWPs6tJSbnck= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Haoxiang Li , Andy Shevchenko , Sasha Levin Subject: [PATCH 6.12 0108/1536] tty: serial: pch_uart: add check for pci_get_slot() Date: Sat, 7 Nov 2026 08:35:24 -0500 Message-ID: <20261107135000.708569898@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134957.653319350@linuxfoundation.org> References: <20261107134957.653319350@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Haoxiang Li [ Upstream commit 970ede67de0e3f6a1e707ec99ae49d80bf3f2966 ] Add check for pci_get_slot() to prevent a potetial null pointer dereference in pch_request_dma(). Signed-off-by: Haoxiang Li Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/20260623140539.2272473-1-haoxiang_li2024@163.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/serial/pch_uart.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 5d99f050aff0a..3f63adb6cd758 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -678,6 +678,11 @@ static void pch_request_dma(struct uart_port *port) /* Get DMA's dev information */ dma_dev = pci_get_slot(priv->pdev->bus, PCI_DEVFN(PCI_SLOT(priv->pdev->devfn), 0)); + if (!dma_dev) { + dev_err(priv->port.dev, "%s: failed to get DMA device\n", + __func__); + return; + } /* Set Tx DMA */ param = &priv->param_tx; -- 2.53.0