Re: [PATCH 0/4] PCI: Fix procfs PCI config access issues
From: Krzysztof Wilczyński
Date: Tue Jul 28 2026 - 19:19:42 EST
Hello,
> As suggested by Bjorn, this series aligns the implementation of procfs with
> the sysfs counterpart and fixes procfs PCI configuration access issues.
>
> The first two patches refactor proc_bus_pci_{write,read}() to align
> with pci_write_config() and pci_read_config() respectively:
> - Rename variables (pos->off, cnt->count/size) for consistency
> - Remove rebundant bounds check
>
> The last two patches fix potential overflow issues:
> - Prevent overflow when offset exceeds reasonable range
> - Fix implicit 64-bit to 32-bit truncation in read path
>
> Link: https://lore.kernel.org/all/20260303193253.GA3817951@bhelgaas/
>
> Ziming Du (4):
> PCI: Align proc_bus_pci_write() with pci_write_config()
> PCI: Align proc_bus_pci_read() with pci_read_config()
> PCI: Prevent overflow in proc_bus_pci_write()
> PCI: Prevent overflow in proc_bus_pci_read()
>
> drivers/pci/proc.c | 115 ++++++++++++++++++++++-----------------------
> 1 file changed, 57 insertions(+), 58 deletions(-)
These changes here are worth doing, so I wonder if you have some time to
pick this up? If not, then I am happy to pick this up and send a v2?
Thank you!
Krzysztof