panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x68adb6]

goroutine 1344206 [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(0xc420ddec80, 0xc420dd2c00, 0x0, 0x20000740, 0x20010673, 0x20000000, 0x20011000, 0x1, 0xc420dd2c00)
	pkg/sentry/mm/pma.go:748 +0x5d
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc420ddec80, 0xc58c00, 0xc420ad1600, 0x20000740, 0x20010673, 0x100, 0xc421ca3590, 0xc421ca3328, 0xc421ca32d0, 0xc420179510)
	pkg/sentry/mm/io.go:493 +0x334
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withVecInternalMappings(0xc420ddec80, 0xc58c00, 0xc420ad1600, 0x0, 0x1, 0x20000740, 0xff33, 0x100, 0xc421ca3590, 0x40fb69, ...)
	pkg/sentry/mm/io.go:533 +0x7f1
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOutFrom(0xc420ddec80, 0xc58c00, 0xc420ad1600, 0x0, 0x1, 0x20000740, 0xff33, 0xc4d360, 0xc420ae6040, 0xc421ca0100, ...)
	pkg/sentry/mm/io.go:272 +0x17c
gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyOutFrom(0xc578e0, 0xc420ddec80, 0x0, 0x1, 0x20000740, 0xff33, 0x100, 0xc58c00, 0xc420ad1600, 0xc4d360, ...)
	pkg/sentry/usermem/usermem.go:521 +0xad
gvisor.googlesource.com/gvisor/pkg/sentry/fs/host.(*fileOperations).Read(0xc42134f740, 0xc58c00, 0xc420ad1600, 0xc4202dbc20, 0xc578e0, 0xc420ddec80, 0x0, 0x1, 0x20000740, 0xff33, ...)
	pkg/sentry/fs/host/file.go:250 +0x366
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*overlayFileOperations).Read(0xc42134f770, 0xc58c00, 0xc420ad1600, 0xc4202dbcb0, 0xc578e0, 0xc420ddec80, 0x0, 0x1, 0x20000740, 0xff33, ...)
	pkg/sentry/fs/file_overlay.go:215 +0x170
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Preadv(0xc4202dbcb0, 0xc58c00, 0xc420ad1600, 0xc578e0, 0xc420ddec80, 0x0, 0x1, 0x20000740, 0xff33, 0x100, ...)
	pkg/sentry/fs/file.go:250 +0x117
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.preadv(0xc420ad1600, 0xc4202dbcb0, 0xc578e0, 0xc420ddec80, 0x0, 0x1, 0x20000740, 0xff33, 0x100, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_read.go:234 +0x9e
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Pread64(0xc420ad1600, 0x3, 0x20000740, 0xff33, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_read.go:114 +0x284
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc420ad1600, 0x11, 0x3, 0x20000740, 0xff33, 0x0, 0x0, 0x0, 0x0, 0xb99c40, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc420ad1600, 0x11, 0x3, 0x20000740, 0xff33, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc420ad1600, 0x11, 0x3, 0x20000740, 0xff33, 0x0, 0x0, 0x0, 0xc4baa0, 0x0)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420ad1600, 0x2, 0xc4205de6c0)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420ad1600, 0xc4baa0, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xe56
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420ad1600, 0x1aaa)
	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