panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x7de9f8]

goroutine 178 [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 +0x48
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).getPMAInternalMappingsLocked(0xc4202fec80, 0xc4202ff2e8, 0x3, 0x20000200, 0x20001040, 0x20000000, 0x20002000, 0x1, 0xc4202ff2e8)
	pkg/sentry/mm/pma.go:748 +0x73
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc4202fec80, 0x10cb800, 0xc4204c1200, 0x20000200, 0x20001040, 0x100, 0xc4204f51e8, 0x10cb800, 0xc4204c1200, 0x200001c0)
	pkg/sentry/mm/io.go:493 +0x348
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOut(0xc4202fec80, 0x10cb800, 0xc4204c1200, 0x20000200, 0xc4204f7000, 0xe40, 0x1000, 0x10c0100, 0xc4204c1200, 0x200001c0, ...)
	pkg/sentry/mm/io.go:119 +0x210
gvisor.googlesource.com/gvisor/pkg/sentry/usermem.CopyOutVec(0x10cb800, 0xc4204c1200, 0x10ca360, 0xc4202fec80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0xc4204f7000, 0xe40, ...)
	pkg/sentry/usermem/usermem.go:276 +0x1c2
gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyOut(0x10ca360, 0xc4202fec80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, 0x10cb800, 0xc4204c1200, 0xc4204f7000, ...)
	pkg/sentry/usermem/usermem.go:494 +0xe0
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*Pipe).read(0xc4204988c0, 0x10cb800, 0xc4204c1200, 0x10ca360, 0xc4202fec80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, ...)
	pkg/sentry/kernel/pipe/pipe.go:186 +0x2f5
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*ReaderWriter).Read(0xc42040a050, 0x10cb800, 0xc4204c1200, 0xc42053c240, 0x10ca360, 0xc4202fec80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, ...)
	pkg/sentry/kernel/pipe/reader_writer.go:55 +0xac
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Readv(0xc42053c240, 0x10cb800, 0xc4204c1200, 0x10ca360, 0xc4202fec80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, ...)
	pkg/sentry/fs/file.go:232 +0x15c
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.readv(0xc4204c1200, 0xc42053c240, 0x10ca360, 0xc4202fec80, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, 0x50c7e3e3, ...)
	pkg/sentry/syscalls/linux/sys_read.go:191 +0xa2
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Read(0xc4204c1200, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_read.go:67 +0x296
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4204c1200, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0xe40, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4204c1200, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0x4, 0x46155c)
	pkg/sentry/kernel/task_syscall.go:280 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4204c1200, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0xc4204be460, 0xc4204f5c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4204c1200, 0x2, 0xc4203ae120)
	pkg/sentry/kernel/task_syscall.go:216 +0x19f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4204c1200, 0x10bc5a0, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4204c1200, 0x7)
	pkg/sentry/kernel/task_run.go:95 +0x265
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:258 +0x194