panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x8fb075]

goroutine 131 gp=0xc0009a0380 m=5 mp=0xc000500008 [running]:
panic({0x11913e0?, 0x2070a40?})
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc000849938 sp=0xc000849888 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=0xc000849998 sp=0xc000849938 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(0xc0006c1008, 0xc0c9c0?, 0x86ac726dff2f4713, 0xc000849a58)
	pkg/sentry/mm/syscalls.go:1264 +0x195 fp=0xc000849a38 sp=0xc000849998 pc=0x8fb075
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).SetDontFork(...)
	pkg/sentry/mm/syscalls.go:1292
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Madvise(0xc0006d0c88?, 0x5595bc396000?, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_mmap.go:186 +0x95 fp=0xc000849a78 sp=0xc000849a38 pc=0xc00115
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0006d0c88, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x657 fp=0xc000849ca8 sp=0xc000849a78 pc=0xa76c37
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0006d0c88, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc000849d00 sp=0xc000849ca8 pc=0xa77da5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0006d0c88, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc000849d50 sp=0xc000849d00 pc=0xa77aa5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00099e160?)
	pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc000849e28 sp=0xc000849d50 pc=0xa77825
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0000ef170?, 0xc0006d0c88)
	pkg/sentry/kernel/task_run.go:269 +0xf17 fp=0xc000849f30 sp=0xc000849e28 pc=0xa6d137
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0006d0c88, 0x7)
	pkg/sentry/kernel/task_run.go:97 +0x214 fp=0xc000849fc0 sp=0xc000849f30 pc=0xa6bb94
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:400 +0x25 fp=0xc000849fe0 sp=0xc000849fc0 pc=0xa75645
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc000849fe8 sp=0xc000849fe0 pc=0x47d0c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 123
	pkg/sentry/kernel/task_start.go:400 +0xc5