panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x808398]

goroutine 1684341 [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(0xc000886580, 0xc0012d3080, 0x0, 0x20000000, 0x21000000, 0x211, 0x0, 0x1000000, 0xc0008865dc)
	pkg/sentry/mm/pma.go:748 +0x73
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).getVecPMAInternalMappingsLocked(0xc000886580, 0xc081960000, 0x212, 0x0, 0x1000000, 0x0, 0x1000000, 0x101, 0xc081960000, 0x212, ...)
	pkg/sentry/mm/pma.go:774 +0x12f
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withVecInternalMappings(0xc000886580, 0x11dc260, 0xc081878000, 0xc081960000, 0x212, 0x0, 0x7ffff000, 0x100, 0xc08188cea8, 0x8, ...)
	pkg/sentry/mm/io.go:567 +0x456
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOutFrom(0xc000886580, 0x11dc260, 0xc081878000, 0xc081960000, 0x212, 0x0, 0x7ffff000, 0x11cd5e0, 0xc00117f7c0, 0x460100, ...)
	pkg/sentry/mm/io.go:272 +0x1f9
gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyOutFrom(0x11db120, 0xc000886580, 0xc081960000, 0x212, 0x0, 0x7ffff000, 0x100, 0x11dc260, 0xc081878000, 0x11cd5e0, ...)
	pkg/sentry/usermem/usermem.go:521 +0xde
gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil.(*CachingInodeOperations).Read(0xc0004cc000, 0x11dc260, 0xc081878000, 0xc000755830, 0x11db120, 0xc000886580, 0xc081960000, 0x212, 0x0, 0x7ffff000, ...)
	pkg/sentry/fs/fsutil/inode_cached.go:497 +0x24d
gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*fileOperations).Read(0xc0818a7fb0, 0x11dc260, 0xc081878000, 0xc000755830, 0x11db120, 0xc000886580, 0xc081960000, 0x212, 0x0, 0x7ffff000, ...)
	pkg/sentry/fs/gofer/file.go:229 +0x549
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*overlayFileOperations).Read(0xc0002b28d0, 0x11dc260, 0xc081878000, 0xc0007558c0, 0x11db120, 0xc000886580, 0xc081960000, 0x212, 0x0, 0x7ffff000, ...)
	pkg/sentry/fs/file_overlay.go:223 +0x2c2
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Preadv(0xc0007558c0, 0x11dc260, 0xc081878000, 0x11db120, 0xc000886580, 0xc081960000, 0x212, 0x0, 0x7ffff000, 0x100, ...)
	pkg/sentry/fs/file.go:258 +0x182
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.preadv(0xc081878000, 0xc0007558c0, 0x11db120, 0xc000886580, 0xc081960000, 0x212, 0x0, 0x7ffff000, 0x100, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_read.go:234 +0xee
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Preadv(0xc081878000, 0x7, 0x200075c0, 0x1000000000000212, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_read.go:185 +0x358
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc081878000, 0x127, 0x7, 0x200075c0, 0x1000000000000212, 0x0, 0x0, 0x0, 0xc081878000, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x17b
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc081878000, 0x127, 0x7, 0x200075c0, 0x1000000000000212, 0x0, 0x0, 0x0, 0xc00015f508, 0xc6a700)
	pkg/sentry/kernel/task_syscall.go:280 +0xb5
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc081878000, 0x127, 0x7, 0x200075c0, 0x1000000000000212, 0x0, 0x0, 0x0, 0xc0815f5c00, 0x4626ce)
	pkg/sentry/kernel/task_syscall.go:241 +0x10d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc081878000, 0x2, 0xc0007de2c0)
	pkg/sentry/kernel/task_syscall.go:216 +0x1e4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc081878000, 0x11cd860, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x15aa
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc081878000, 0x343b)
	pkg/sentry/kernel/task_run.go:95 +0x27a
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:279 +0x19e