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PCI: plda: Protect root bus removal with rescan lock

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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 <mani@kernel.org>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260521161822.132996-10-18255117159@163.com
This commit is contained in:
Hans Zhang
2026-05-22 00:18:22 +08:00
committed by Bjorn Helgaas
parent a29812a55d
commit 4e4f9745f0
1 changed files with 2 additions and 0 deletions
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2
drivers/pci/controller/plda/pcie-plda-host.c
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@@ -640,8 +640,10 @@ EXPORT_SYMBOL_GPL(plda_pcie_host_init);
void plda_pcie_host_deinit(struct plda_pcie_rp *port)
{
pci_lock_rescan_remove();
pci_stop_root_bus(port->bridge->bus);
pci_remove_root_bus(port->bridge->bus);
pci_unlock_rescan_remove();
plda_pcie_irq_domain_deinit(port);