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

goroutine 1683784 [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(0xc420931900, 0xc4204dc100, 0x1, 0x20003000, 0x20013000, 0x20003000, 0x20013000, 0x1, 0xc4204dc100)
	pkg/sentry/mm/pma.go:748 +0x73
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc420931900, 0x10cb800, 0xc4210dd200, 0x20003000, 0x20013000, 0x100, 0xc421591328, 0xc421050f90, 0x43e8a5, 0xd31ca0)
	pkg/sentry/mm/io.go:493 +0x348
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withVecInternalMappings(0xc420931900, 0x10cb800, 0xc4210dd200, 0x0, 0x1, 0x20003000, 0x10000, 0x100, 0xc420ff5328, 0xd45230, ...)
	pkg/sentry/mm/io.go:533 +0x974
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOutFrom(0xc420931900, 0x10cb800, 0xc4210dd200, 0x0, 0x1, 0x20003000, 0x10000, 0x10bde40, 0xc420428060, 0x410100, ...)
	pkg/sentry/mm/io.go:272 +0x211
gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyOutFrom(0x10ca360, 0xc420931900, 0x0, 0x1, 0x20003000, 0x10000, 0x100, 0x10cb800, 0xc4210dd200, 0x10bde40, ...)
	pkg/sentry/usermem/usermem.go:521 +0xcf
gvisor.googlesource.com/gvisor/pkg/sentry/fs/host.(*fileOperations).Read(0xc421051050, 0x10cb800, 0xc4210dd200, 0xc420bde750, 0x10ca360, 0xc420931900, 0x0, 0x1, 0x20003000, 0x10000, ...)
	pkg/sentry/fs/host/file.go:250 +0x61c
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*overlayFileOperations).Read(0xc421051080, 0x10cb800, 0xc4210dd200, 0xc420bde870, 0x10ca360, 0xc420931900, 0x0, 0x1, 0x20003000, 0x10000, ...)
	pkg/sentry/fs/file_overlay.go:215 +0x243
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Preadv(0xc420bde870, 0x10cb800, 0xc4210dd200, 0x10ca360, 0xc420931900, 0x0, 0x1, 0x20003000, 0x10000, 0x100, ...)
	pkg/sentry/fs/file.go:250 +0x13d
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.preadv(0xc4210dd200, 0xc420bde870, 0x10ca360, 0xc420931900, 0x0, 0x1, 0x20003000, 0x10000, 0x100, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_read.go:234 +0xaf
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Pread64(0xc4210dd200, 0x9, 0x20003000, 0x10000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_read.go:114 +0x2fc
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4210dd200, 0x11, 0x9, 0x20003000, 0x10000, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4210dd200, 0x11, 0x9, 0x20003000, 0x10000, 0x0, 0x0, 0x0, 0x9, 0x46155c)
	pkg/sentry/kernel/task_syscall.go:280 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4210dd200, 0x11, 0x9, 0x20003000, 0x10000, 0x0, 0x0, 0x0, 0xc420d203a0, 0xc420ff5c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4210dd200, 0x2, 0xc420133440)
	pkg/sentry/kernel/task_syscall.go:216 +0x19f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4210dd200, 0x10bc5a0, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4210dd200, 0x3783)
	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