Vidya Sagar db744ddd59 PCI/MSI: Prevent MSI hardware interrupt number truncation ... While calculating the hardware interrupt number for a MSI interrupt, the higher bits (i.e. from bit-5 onwards a.k.a domain_nr >= 32) of the PCI domain number gets truncated because of the shifted value casting to return type of pci_domain_nr() which is 'int'. This for example is resulting in same hardware interrupt number for devices 0019:00:00.0 and 0039:00:00.0. To address this cast the PCI domain number to 'irq_hw_number_t' before left shifting it to calculate the hardware interrupt number. Please note that this fixes the issue only on 64-bit systems and doesn't change the behavior for 32-bit systems i.e. the 32-bit systems continue to have the issue. Since the issue surfaces only if there are too many PCIe controllers in the system which usually is the case in modern server systems and they don't tend to run 32-bit kernels. Fixes: 3878eaefb8 ("PCI/MSI: Enhance core to support hierarchy irqdomain") Signed-off-by: Vidya Sagar <vidyas@nvidia.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Shanker Donthineni <sdonthineni@nvidia.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20240115135649.708536-1-vidyas@nvidia.com		2024-02-19 16:11:01 +01:00
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api.c	PCI/MSI: Clarify usage of pci_msix_free_irq()	2023-02-21 08:25:14 +01:00
irqdomain.c	PCI/MSI: Prevent MSI hardware interrupt number truncation	2024-02-19 16:11:01 +01:00
legacy.c	PCI/MSI: Prevent UAF in error path	2022-01-21 02:14:46 +01:00
Makefile	PCI/MSI: Move pci_disable_msi() to api.c	2022-11-17 15:15:20 +01:00
msi.c	PCI/MSI: Use FIELD_GET/PREP()	2023-10-24 10:54:04 -05:00
msi.h	PCI/MSI: Split MSI-X descriptor setup	2022-12-05 22:22:34 +01:00
pcidev_msi.c