panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x975261]

goroutine 243 gp=0xc000b8c540 m=10 mp=0xc00090e008 [running]:
panic({0x12ac6c0?, 0x236d190?})
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc00055d908 sp=0xc00055d858 pc=0x473fe8
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=0xc00055d968 sp=0xc00055d908 pc=0x476719
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(0xc00098b008, 0x47469f?, 0x86ac726dff2f4713, 0xc00055da28)
	pkg/sentry/mm/syscalls.go:1264 +0x201 fp=0xc00055da08 sp=0xc00055d968 pc=0x975261
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).SetDontFork(0xc0002baa20?, 0x16c9bc0?, 0xc000836008?, 0x40?)
	pkg/sentry/mm/syscalls.go:1292 +0x33 fp=0xc00055da48 sp=0xc00055da08 pc=0x9755d3
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Madvise(0x0?, 0xc000b8c540?, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_mmap.go:186 +0xd5 fp=0xc00055da78 sp=0xc00055da48 pc=0xcd30d5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000836008, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x80b fp=0xc00055dca8 sp=0xc00055da78 pc=0xb1d4eb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000836008, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x4e fp=0xc00055dd00 sp=0xc00055dca8 pc=0xb1ea8e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000836008, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x7d fp=0xc00055dd50 sp=0xc00055dd00 pc=0xb1e63d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000790000?)
	pkg/sentry/kernel/task_syscall.go:258 +0x349 fp=0xc00055de28 sp=0xc00055dd50 pc=0xb1e329
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000722240?, 0xc000836008)
	pkg/sentry/kernel/task_run.go:269 +0x1325 fp=0xc00055df38 sp=0xc00055de28 pc=0xb11b85
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000836008, 0x7)
	pkg/sentry/kernel/task_run.go:97 +0x27d fp=0xc00055dfc0 sp=0xc00055df38 pc=0xb1019d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:400 +0x25 fp=0xc00055dfe0 sp=0xc00055dfc0 pc=0xb1ba65
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc00055dfe8 sp=0xc00055dfe0 pc=0x47d0c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 236
	pkg/sentry/kernel/task_start.go:400 +0xd9