Seg fault when trying to update from ae22611 -> ae3ab27 #1862
Description
Describe the bug
2025-09-09T06:39:51.235386830Z unexpected fault address 0x7f2d6f204000
2025-09-09T06:39:51.235399103Z fatal error: fault
2025-09-09T06:39:51.237766470Z [signal SIGSEGV: segmentation violation code=0x1 addr=0x7f2d6f204000 pc=0x48b70f]
2025-09-09T06:39:51.237775727Z
2025-09-09T06:39:51.237780396Z goroutine 13647 gp=0xc00032f500 m=9 mp=0xc000942808 [running, locked to thread]:
2025-09-09T06:39:51.239471371Z runtime.throw({0x4a2c032?, 0x3c2ed20?})
2025-09-09T06:39:51.239488343Z /usr/local/go/src/runtime/panic.go:1094 +0x48 fp=0xc002dcdaa0 sp=0xc002dcda70 pc=0x4821e8
2025-09-09T06:39:51.239492531Z runtime.sigpanic()
2025-09-09T06:39:51.239495156Z /usr/local/go/src/runtime/signal_unix.go:939 +0x26c fp=0xc002dcdb00 sp=0xc002dcdaa0 pc=0x48472c
2025-09-09T06:39:51.239497360Z runtime.memmove()
2025-09-09T06:39:51.239500115Z /usr/local/go/src/runtime/memmove_amd64.s:201 +0x16f fp=0xc002dcdb08 sp=0xc002dcdb00 pc=0x48b70f
2025-09-09T06:39:51.239502740Z github.com/cilium/ebpf.(*Memory).WriteAt(0x3c2ed20?, {0xc002c09230?, 0x14, 0x47f9a5?}, 0x1500?)
2025-09-09T06:39:51.239505285Z /go/src/github.com/cilium/cilium/vendor/github.com/cilium/ebpf/memory.go:149 +0xf9 fp=0xc002dcdb58 sp=0xc002dcdb08 pc=0x671cd9
2025-09-09T06:39:51.239507619Z github.com/cilium/ebpf.(*Variable).Set(0xc000e88420, {0x3c2ed20?, 0xc002c09230?})
2025-09-09T06:39:51.239510194Z /go/src/github.com/cilium/cilium/vendor/github.com/cilium/ebpf/variable.go:212 +0x125 fp=0xc002dcdbd0 sp=0xc002dcdb58 pc=0x678705
2025-09-09T06:39:51.239512639Z github.com/cilium/cilium/pkg/datapath/loader.LoadSockTerm.func1(0x2, {0xc003eea444, 0x4, 0xc00032f500?}, 0x35)
2025-09-09T06:39:51.239514973Z /go/src/github.com/cilium/cilium/pkg/datapath/loader/sock.go:101 +0x11a fp=0xc002dcdc28 sp=0xc002dcdbd0 pc=0x353dfda
2025-09-09T06:39:51.239517838Z github.com/cilium/cilium/pkg/datapath/sockets.(*bpfSocketDestroyer).Destroy(0xc000e36198, 0xc00180f820, {{0xc003eea444, 0x4, 0x4}, 0x35, 0x2, 0x11, 0xffff, 0xc0060e84e0})
2025-09-09T06:39:51.239520423Z /go/src/github.com/cilium/cilium/pkg/datapath/sockets/sockets.go:251 +0x210 fp=0xc002dcde58 sp=0xc002dcdc28 pc=0x3545510
2025-09-09T06:39:51.239522998Z github.com/cilium/cilium/pkg/loadbalancer/reconciler.terminateConnectionsToBackend.terminateConnectionsToBackend.func2.func3()
2025-09-09T06:39:51.239525532Z /go/src/github.com/cilium/cilium/pkg/loadbalancer/reconciler/termination.go:229 +0x114 fp=0xc002dcdf08 sp=0xc002dcde58 pc=0x355a214
2025-09-09T06:39:51.239528107Z github.com/cilium/cilium/pkg/netns.(*NetNS).Do.func1()
2025-09-09T06:39:51.239530752Z /go/src/github.com/cilium/cilium/pkg/netns/netns_linux.go:175 +0x8e fp=0xc002dcdf78 sp=0xc002dcdf08 pc=0x2578b6e
2025-09-09T06:39:51.239533788Z golang.org/x/sync/errgroup.(*Group).Go.func1()
2025-09-09T06:39:51.239537114Z /go/src/github.com/cilium/cilium/vendor/golang.org/x/sync/errgroup/errgroup.go:93 +0x50 fp=0xc002dcdfe0 sp=0xc002dcdf78 pc=0xc668f0
2025-09-09T06:39:51.239539799Z runtime.goexit({})
2025-09-09T06:39:51.239542364Z /usr/local/go/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc002dcdfe8 sp=0xc002dcdfe0 pc=0x48a7c1
2025-09-09T06:39:51.239544909Z created by golang.org/x/sync/errgroup.(*Group).Go in goroutine 621
2025-09-09T06:39:51.239547554Z /go/src/github.com/cilium/cilium/vendor/golang.org/x/sync/errgroup/errgroup.go:78 +0x95
How to reproduce
Seen in https://github.com/cilium/cilium/actions/runs/17553691373 when trying to update the library.
Version information
github.com/cilium/ebpf ae3ab27