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 0A7B114A4C7; Wed, 7 May 2025 18:43:33 +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=1746643413; cv=none; b=R0RnEP975TW5n9Brx4f0NGSiHL10hWSXvUuywWNCaC/YLnM390U8sJE2Vzq112WLASbdJNrF7qqD8ic1/QaKDodrK5eVfIOZSzyWhJZ1ASj3dU5pXGmFfH4iR8HfMtfzmmZEyHvliDVwNE2YnYwwChK3H9z/UnMX/M6ZMOFgviA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746643413; c=relaxed/simple; bh=7tPN2LFneCPZtyAm6g6ttERY3XOQuqzVh5c4b86qKV8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fEYM9nrSkeD7iKD8e3Y0zgXJ4a7vS49Hiez2aE88EjEQkN2nn/A1TQIz1/BDZ2EERuTiflKkGUP9NDmvAzfOgrYei++cISIDi8pK6++A7fMmqkyYVGFvXPHa6pFo5bByBC76z6x4+682It9fmXoV+WNYjePHTaS4Q+yRhcDoKR8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Xj4ykAEE; 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="Xj4ykAEE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D95EC4CEE2; Wed, 7 May 2025 18:43:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1746643412; bh=7tPN2LFneCPZtyAm6g6ttERY3XOQuqzVh5c4b86qKV8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xj4ykAEEP+P3r1YMU82en1v9TqaQlzLgarHABWCFuYn1R2nTMQYZh9RN6eib+5kUr lVxX8K3/pbKz23A/2+3FtedfVc/zmCq6PNuhMPuvg0BTYKp/zbmdhIs83IOs7DHE4U skg8P1mv4kkfPpm0IFRCx4r8+Tj+BD9Lk6B+Z37M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Suzuki K Poulose , Thomas Gleixner , Ingo Molnar , Marc Zyngier , Sasha Levin Subject: [PATCH 5.15 51/55] irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode() Date: Wed, 7 May 2025 20:39:52 +0200 Message-ID: <20250507183801.096181179@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250507183759.048732653@linuxfoundation.org> References: <20250507183759.048732653@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org 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: Suzuki K Poulose [ Upstream commit 3318dc299b072a0511d6dfd8367f3304fb6d9827 ] With ACPI in place, gicv2m_get_fwnode() is registered with the pci subsystem as pci_msi_get_fwnode_cb(), which may get invoked at runtime during a PCI host bridge probe. But, the call back is wrongly marked as __init, causing it to be freed, while being registered with the PCI subsystem and could trigger: Unable to handle kernel paging request at virtual address ffff8000816c0400 gicv2m_get_fwnode+0x0/0x58 (P) pci_set_bus_msi_domain+0x74/0x88 pci_register_host_bridge+0x194/0x548 This is easily reproducible on a Juno board with ACPI boot. Retain the function for later use. Fixes: 0644b3daca28 ("irqchip/gic-v2m: acpi: Introducing GICv2m ACPI support") Signed-off-by: Suzuki K Poulose Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Reviewed-by: Marc Zyngier Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin --- drivers/irqchip/irq-gic-v2m.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c index 6790a621a9324..9d99b19cd21b6 100644 --- a/drivers/irqchip/irq-gic-v2m.c +++ b/drivers/irqchip/irq-gic-v2m.c @@ -455,7 +455,7 @@ static int __init gicv2m_of_init(struct fwnode_handle *parent_handle, #ifdef CONFIG_ACPI static int acpi_num_msi; -static __init struct fwnode_handle *gicv2m_get_fwnode(struct device *dev) +static struct fwnode_handle *gicv2m_get_fwnode(struct device *dev) { struct v2m_data *data; -- 2.39.5