From: Hans Zhang <18255117159@163.com> Date: Thu, 21 May 2026 16:18:18 +0000 (+0800) Subject: PCI: iproc: Protect root bus removal with rescan lock X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a6a64e150f12ad5391e0a0d60f6a3d119b06ce50;p=thirdparty%2Flinux.git PCI: iproc: Protect root bus removal with rescan lock Hold the pci_rescan_remove_lock lock while stopping and removing a root bus to avoid racing with concurrent rescan or hotplug operations triggered via sysfs. Such races may lead to use-after-free issues or system crashes. Signed-off-by: Hans Zhang <18255117159@163.com> Signed-off-by: Manivannan Sadhasivam [bhelgaas: commit log] Signed-off-by: Bjorn Helgaas Link: https://patch.msgid.link/20260521161822.132996-6-18255117159@163.com --- diff --git a/drivers/pci/controller/pcie-iproc.c b/drivers/pci/controller/pcie-iproc.c index ccf71993ea35..c8f0a87cf28a 100644 --- a/drivers/pci/controller/pcie-iproc.c +++ b/drivers/pci/controller/pcie-iproc.c @@ -1529,8 +1529,10 @@ void iproc_pcie_remove(struct iproc_pcie *pcie) { struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); + pci_lock_rescan_remove(); pci_stop_root_bus(host->bus); pci_remove_root_bus(host->bus); + pci_unlock_rescan_remove(); iproc_pcie_msi_disable(pcie);