panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x68b3d6]

goroutine 169 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/mm.pmaIterator.ValuePtr(...)
	bazel-out/k8-fastbuild/bin/pkg/sentry/mm/pma_set.go:973
gvisor.googlesource.com/gvisor/pkg/sentry/mm.pmaIterator.getInternalMappingsLocked(0x0, 0x0, 0x0, 0x0)
	pkg/sentry/mm/pma.go:972 +0x26
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).getPMAInternalMappingsLocked(0xc4203a8c80, 0xc4203a92e8, 0x3, 0x20000200, 0x20001040, 0x20000000, 0x20002000, 0x1, 0xc4203a92e8)
	pkg/sentry/mm/pma.go:748 +0x5d
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc4203a8c80, 0xc5afc0, 0xc420470900, 0x20000200, 0x20001040, 0x100, 0xc4202454f0, 0xc400000001, 0xc420245500, 0xe40)
	pkg/sentry/mm/io.go:493 +0x334
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOut(0xc4203a8c80, 0xc5afc0, 0xc420470900, 0x20000200, 0xc420357000, 0xe40, 0x1000, 0x100, 0x1000, 0xc420245618, ...)
	pkg/sentry/mm/io.go:119 +0x14b
gvisor.googlesource.com/gvisor/pkg/sentry/usermem.CopyOutVec(0xc5afc0, 0xc420470900, 0xc59ca0, 0xc4203a8c80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0xc420357000, 0xe40, ...)
	pkg/sentry/usermem/usermem.go:276 +0x1b0
gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyOut(0xc59ca0, 0xc4203a8c80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, 0xc5afc0, 0xc420470900, 0xc420357000, ...)
	pkg/sentry/usermem/usermem.go:494 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*Pipe).read(0xc42049a8c0, 0xc5afc0, 0xc420470900, 0xc59ca0, 0xc4203a8c80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, ...)
	pkg/sentry/kernel/pipe/pipe.go:186 +0x249
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*ReaderWriter).Read(0xc42000c080, 0xc5afc0, 0xc420470900, 0xc4204c62d0, 0xc59ca0, 0xc4203a8c80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, ...)
	pkg/sentry/kernel/pipe/reader_writer.go:55 +0x8a
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Readv(0xc4204c62d0, 0xc5afc0, 0xc420470900, 0xc59ca0, 0xc4203a8c80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, ...)
	pkg/sentry/fs/file.go:232 +0x116
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.readv(0xc420470900, 0xc4204c62d0, 0xc59ca0, 0xc4203a8c80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, 0x50c7e3e3, ...)
	pkg/sentry/syscalls/linux/sys_read.go:191 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Read(0xc420470900, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_read.go:67 +0x21e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc420470900, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0xe40, 0xb9b360, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc420470900, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0x4002e0, 0x4002e0)
	pkg/sentry/kernel/task_syscall.go:280 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc420470900, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0xc4de40, 0x0)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420470900, 0x2, 0xc420146120)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420470900, 0xc4de40, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xe56
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420470900, 0x8)
	pkg/sentry/kernel/task_run.go:95 +0x174
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:258 +0x100