From 5cea5f63c2cce9fa14618c053208122b62990c51 Mon Sep 17 00:00:00 2001 From: Jim Quinlan Date: Wed, 30 Apr 2025 17:14:52 +0800 Subject: [PATCH] PCI: brcmstb: Fix error path after a call to regulator_bulk_get() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit stable inclusion from stable-6.6.87 commit eedd054834930b8d678f0776cd4b091b8fffbb4a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IC1QR8 CVE: CVE-2025-22095 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=eedd054834930b8d678f0776cd4b091b8fffbb4a -------------------------------- [ Upstream commit 3651ad5249c51cf7eee078e12612557040a6bdb4 ] If the regulator_bulk_get() returns an error and no regulators are created, we need to set their number to zero. If we don't do this and the PCIe link up fails, a call to the regulator_bulk_free() will result in a kernel panic. While at it, print the error value, as we cannot return an error upwards as the kernel will WARN() on an error from add_bus(). Fixes: 9e6be018b263 ("PCI: brcmstb: Enable child bus device regulators from DT") Signed-off-by: Jim Quinlan Reviewed-by: Florian Fainelli Link: https://lore.kernel.org/r/20250214173944.47506-5-james.quinlan@broadcom.com [kwilczynski: commit log, use comma in the message to match style with other similar messages] Signed-off-by: Krzysztof Wilczyński Signed-off-by: Sasha Levin Signed-off-by: Zeng Heng --- drivers/pci/controller/pcie-brcmstb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index e47a77f943b1..e07fda97c7eb 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -1132,7 +1132,8 @@ static int brcm_pcie_add_bus(struct pci_bus *bus) ret = regulator_bulk_get(dev, sr->num_supplies, sr->supplies); if (ret) { - dev_info(dev, "No regulators for downstream device\n"); + dev_info(dev, "Did not get regulators, err=%d\n", ret); + pcie->sr = NULL; goto no_regulators; } -- Gitee