libbpf: Failed to open cpu mask file /sys/devices/system/cpu/possible: -ENOENT
time="2026-11-09T14:32:47Z" level=panic msg="Failed to read the number of possible CPUs from libbpf." error="Invalid number of CPUs: -2"
panic: (*logrus.Entry) 0xc000679420

goroutine 1 [running]:
github.com/sirupsen/logrus.(*Entry).log(0xc0006793b0, 0x0, {0xc00065c440, 0x37})
	/var/cache/melange/gomodcache/github.com/sirupsen/logrus@v1.9.3/entry.go:260 +0x474
github.com/sirupsen/logrus.(*Entry).Log(0xc0006793b0, 0x0, {0xc00045fd60?, 0x4057e00?, 0xc00069d1f0?})
	/var/cache/melange/gomodcache/github.com/sirupsen/logrus@v1.9.3/entry.go:304 +0x48
github.com/sirupsen/logrus.(*Entry).Panic(...)
	/var/cache/melange/gomodcache/github.com/sirupsen/logrus@v1.9.3/entry.go:342
github.com/projectcalico/calico/felix/bpf/maps.NumPossibleCPUs.func1()
	/home/build/felix/bpf/maps/maps.go:52 +0x78
sync.(*Once).doSlow(0x6?, 0x0?)
	/usr/lib/go/src/sync/once.go:78 +0xac
sync.(*Once).Do(...)
	/usr/lib/go/src/sync/once.go:69
github.com/projectcalico/calico/felix/bpf/maps.NumPossibleCPUs()
	/home/build/felix/bpf/maps/maps.go:48 +0x2c
github.com/projectcalico/calico/felix/bpf/counters.init()
	/home/build/felix/bpf/counters/counters.go:36 +0x13