panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xd3a412]

goroutine 121 gp=0xc0006e6c40 m=4 mp=0xc000141508 [running]:
panic({0x1c586e0?, 0x2c2cca0?})
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc000aa94d0 sp=0xc000aa9420 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=0xc000aa9530 sp=0xc000aa94d0 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(0xc000b43008, 0x20bdc000, 0x86ac726dff2f4713, 0xc000aa9660)
	pkg/sentry/mm/syscalls.go:1264 +0x432 fp=0xc000aa9640 sp=0xc000aa9530 pc=0xd3a412
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).SetDontFork(0xc000b43008, 0x20bdc000, 0x86ac726dff2f4713, 0x1)
	pkg/sentry/mm/syscalls.go:1292 +0x95 fp=0xc000aa9690 sp=0xc000aa9640 pc=0xd3a8f5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Madvise(0xc0007e8c88, 0x0?, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_mmap.go:186 +0x1a8 fp=0xc000aa96e8 sp=0xc000aa9690 pc=0x1287d88
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0007e8c88, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0xb9f fp=0xc000aa9998 sp=0xc000aa96e8 pc=0xff329f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0007e8c88, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x85 fp=0xc000aa9a40 sp=0xc000aa9998 pc=0xff53c5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0007e8c88, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0xc7 fp=0xc000aa9ab0 sp=0xc000aa9a40 pc=0xff4ce7
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0007e8c88)
	pkg/sentry/kernel/task_syscall.go:258 +0x54a fp=0xc000aa9bd0 sp=0xc000aa9ab0 pc=0xff484a
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0007e8c88?, 0xc0007e8c88)
	pkg/sentry/kernel/task_run.go:269 +0x2295 fp=0xc000aa9e78 sp=0xc000aa9bd0 pc=0xfdf2d5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0007e8c88, 0x8)
	pkg/sentry/kernel/task_run.go:97 +0x41b fp=0xc000aa9fb0 sp=0xc000aa9e78 pc=0xfdc5fb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:400 +0x45 fp=0xc000aa9fe0 sp=0xc000aa9fb0 pc=0xff0ba5
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc000aa9fe8 sp=0xc000aa9fe0 pc=0x4819a1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 119
	pkg/sentry/kernel/task_start.go:400 +0x185