Re: [PATCH AUTOSEL 6.18-6.1] PCI/proc: Fix race between pci_proc_init() and pci_bus_add_device()

[sashiko-bot@kernel.org]

> From: Krzysztof Wilczyński <kwilczynski@kernel.org>
> 
> [ Upstream commit 8857f6578b001bcf5f53c8c6a3936647f05291a8 ]
> 
> pci_proc_attach_device() creates procfs entries for PCI devices and is
> called from pci_bus_add_device().  It lazily creates the per-bus procfs
> directory (bus->procdir) via proc_mkdir() on first use, and returns early
> if proc_initialized is not yet set.
> 
> On x86 with ACPI, PCI enumeration occurs at subsys_initcall, before
> pci_proc_init() sets proc_initialized at device_initcall.  The
> for_each_pci_dev() loop in pci_proc_init() then creates procfs entries for
> these already-enumerated devices, but runs without holding
> pci_rescan_remove_lock.
> 
> [ ... ]
> Closes: https://lore.kernel.org/linux-pci/20250702155112.40124-2-heshuan@bytedance.com/
> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> Link: https://lore.kernel.org/r/20260611150543.511422-1-kwilczynski@kernel.org
> Signed-off-by: Sasha Levin <sashal@kernel.org>

Sashiko has reviewed this patch and found no issues. It looks great!

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