panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xd3a632]

goroutine 421 gp=0xc000fb21c0 m=8 mp=0xc0004b4008 [running]:
panic({0x1c597a0?, 0x2c2bca0?})
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc000e0d4d0 sp=0xc000e0d420 pc=0x478628
runtime.panicmem(...)
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:262
runtime.sigpanic()
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/signal_unix.go:900 +0x359 fp=0xc000e0d530 sp=0xc000e0d4d0 pc=0x47adf9
gvisor.dev/gvisor/pkg/sentry/mm.vmaIterator.Start(...)
	bazel-out/k8-fastbuild/bin/pkg/sentry/mm/vma_set.go:1476
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).madviseMutateVMAs(0xc000cd3008, 0x20bdc000, 0x86ac726dff2f4713, 0xc000e0d660)
	pkg/sentry/mm/syscalls.go:1264 +0x432 fp=0xc000e0d640 sp=0xc000e0d530 pc=0xd3a632
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).SetDontFork(0xc000cd3008, 0x20bdc000, 0x86ac726dff2f4713, 0x1)
	pkg/sentry/mm/syscalls.go:1292 +0x95 fp=0xc000e0d690 sp=0xc000e0d640 pc=0xd3ab15
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Madvise(0xc000a82588, 0x60?, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_mmap.go:186 +0x1a8 fp=0xc000e0d6e8 sp=0xc000e0d690 pc=0x1289708
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000a82588, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0xb9f fp=0xc000e0d998 sp=0xc000e0d6e8 pc=0xff45bf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000a82588, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x85 fp=0xc000e0da40 sp=0xc000e0d998 pc=0xff66e5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000a82588, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0xc7 fp=0xc000e0dab0 sp=0xc000e0da40 pc=0xff6007
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000a82588)
	pkg/sentry/kernel/task_syscall.go:258 +0x54a fp=0xc000e0dbd0 sp=0xc000e0dab0 pc=0xff5b6a
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000a82588?, 0xc000a82588)
	pkg/sentry/kernel/task_run.go:269 +0x2295 fp=0xc000e0de78 sp=0xc000e0dbd0 pc=0xfe05f5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000a82588, 0xf)
	pkg/sentry/kernel/task_run.go:97 +0x41b fp=0xc000e0dfb0 sp=0xc000e0de78 pc=0xfdd91b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:400 +0x45 fp=0xc000e0dfe0 sp=0xc000e0dfb0 pc=0xff1ec5
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc000e0dfe8 sp=0xc000e0dfe0 pc=0x4819a1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 437
	pkg/sentry/kernel/task_start.go:400 +0x185