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eWstFVKc80SFdTzqLHAjdxqqzyWJeo2YqzgbnA1vUBXIvPj1ozbGRqV+zCT/HRSSUh1SrPVzd6b I76XbkqPUGAQJAzsEI7d8QnEsARaYOeb68rNH//5CHN2vddu1vpc On 17/08/2026 23:13, Ivy Lopez wrote: > dev_to_node() can return NUMA_NO_NODE (-1) on systems without NUMA > topology information for the PCI device, such as single-socket > boards that don't expose device-to-node affinity. I think that this problem would have appeared by now for this driver (if it were really a problem). However, for CONFIG_NUMA=n dev_to_node() always returns NUMA_NO_NODE. > Passing -1 > directly into cpumask_of_node() indexes node_to_cpumask_map[-1], > an out-of-bounds array read caught by UBSAN: > > UBSAN: array-index-out-of-bounds in arch/x86/include/asm/topology.h:72:28 > index -1 is out of range for type 'cpumask *[1024]' x86 seems to be only arch which has this problem now. I have tried unsuccessfully to fix it: https://lore.kernel.org/lkml/20260107094007.966496-5-john.g.garry@oracle.com/