panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xcaea6b]

goroutine 556554 gp=0xc001da9340 m=46 mp=0xc027882008 [running]:
panic({0x1b67d00?, 0x2b48150?})
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc07c8eb4d0 sp=0xc07c8eb420 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=0xc07c8eb530 sp=0xc07c8eb4d0 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(0xc07c00f008, 0x20bdc000, 0x86ac726dff2f4713, 0xc07c8eb678)
	pkg/sentry/mm/syscalls.go:1264 +0x2eb fp=0xc07c8eb638 sp=0xc07c8eb530 pc=0xcaea6b
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).SetDontFork(...)
	pkg/sentry/mm/syscalls.go:1292
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Madvise(0xc07c528588, 0xca?, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_mmap.go:186 +0x159 fp=0xc07c8eb6c8 sp=0xc07c8eb638 pc=0x11cfcf9
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc07c528588, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x995 fp=0xc07c8eb960 sp=0xc07c8eb6c8 pc=0xf51d35
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc07c528588, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x72 fp=0xc07c8eba08 sp=0xc07c8eb960 pc=0xf53b92
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc07c528588, 0x1c, {{0x20bdc000}, {0x86ac726dff2f4713}, {0xa}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x94 fp=0xc07c8eba78 sp=0xc07c8eba08 pc=0xf53594
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc07c528588)
	pkg/sentry/kernel/task_syscall.go:258 +0x4b0 fp=0xc07c8ebb98 sp=0xc07c8eba78 pc=0xf53130
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc07c528588?, 0xc07c528588)
	pkg/sentry/kernel/task_run.go:269 +0x1fae fp=0xc07c8ebe70 sp=0xc07c8ebb98 pc=0xf3f24e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc07c528588, 0xda17)
	pkg/sentry/kernel/task_run.go:97 +0x4fb fp=0xc07c8ebfb0 sp=0xc07c8ebe70 pc=0xf3c8bb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:400 +0x45 fp=0xc07c8ebfe0 sp=0xc07c8ebfb0 pc=0xf4fb05
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc07c8ebfe8 sp=0xc07c8ebfe0 pc=0x4819a1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 556553
	pkg/sentry/kernel/task_start.go:400 +0x165