Long Li 2c7493f980 net: mana: Cap MSI-X vectors to the device MSI-X table size ... mana_gd_query_max_resources() sizes gc->num_msix_usable from resp.max_msix and the CPU count, but never from the device MSI-X table. On a 1792 vCPU M-series VM that yields 1793 while the table has 1024 entries, and mana_gd_setup_remaining_irqs() then walks indices 1..1792, running off the end of the region mapped by msix_map_region(): BUG: unable to handle page fault for address: ff8e347f8b99800c RIP: 0010:msix_prepare_msi_desc+0x7a/0x90 RAX: 0000000000004000 RBX: ff4330cb164ea780 RCX: ff8e347f8b998000 Call Trace: <TASK> __msi_domain_alloc_irqs+0x13a/0x440 msi_domain_alloc_irq_at+0x149/0x1b0 mana_gd_setup+0x351/0x890 mana_gd_probe+0x274/0x390 </TASK> RAX is index 1024 * PCI_MSIX_ENTRY_SIZE, one entry past the table. msi_insert_desc() does range check the index, but only against the MSI domain hwsize, which matches the table only for devices on an MSI parent domain. With a global PCI/MSI domain hwsize is MSI_XA_DOMAIN_SIZE, so nothing bounds the request. Cap num_msix_usable with pci_msix_vec_count(). Fixes: 7553911210 ("net: mana: Allocate MSI-X vectors dynamically") Signed-off-by: Long Li <longli@microsoft.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260821183736.733296-1-longli@microsoft.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2026-08-24 12:00:31 -07:00
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mana	net: mana: Cap MSI-X vectors to the device MSI-X table size	2026-08-24 12:00:31 -07:00
Kconfig	net: mana: Add Interrupt Moderation support	2026-07-09 10:54:00 +02:00
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