panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xb7576a]

goroutine 734377 [running]:
panic({0x16ee920, 0x2544c50})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc0042d6f18 sp=0xc0042d6e58 pc=0x438317
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:220
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:818 +0x336 fp=0xc0042d6f68 sp=0xc0042d6f18 pc=0x450556
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).IncUsers(0x0)
	pkg/sentry/mm/lifecycle.go:246 +0x2a fp=0xc0042d6f90 sp=0xc0042d6f68 pc=0xb7576a
gvisor.dev/gvisor/pkg/sentry/kernel.(*taskCopyContext).getMemoryManager(0xc005cb8d20)
	pkg/sentry/kernel/task_usermem.go:353 +0xb5 fp=0xc0042d6fc8 sp=0xc0042d6f90 pc=0xd60475
gvisor.dev/gvisor/pkg/sentry/kernel.(*taskCopyContext).CopyInBytes(0xc005cb8d20, 0x0?, {0xc0077e93c4, 0x10, 0x90})
	pkg/sentry/kernel/task_usermem.go:361 +0x77 fp=0xc0042d70c0 sp=0xc0042d6fc8 pc=0xd60557
gvisor.dev/gvisor/pkg/sentry/kernel.makeIovec({0x1bc8058, 0xc005cb8d20}, 0xc0077e8a80, 0xc0042d7220?, {0xc0077e93c4, 0x10, 0x90})
	pkg/sentry/kernel/task_usermem.go:261 +0xa4 fp=0xc0042d7178 sp=0xc0042d70c0 pc=0xd5f684
gvisor.dev/gvisor/pkg/sentry/kernel.copyInIovecs({0x1bc8058, 0xc005cb8d20}, 0xc0077e8a80, 0x20003700, 0xa)
	pkg/sentry/kernel/task_usermem.go:231 +0x27f fp=0xc0042d7258 sp=0xc0042d7178 pc=0xd5f37f
gvisor.dev/gvisor/pkg/sentry/kernel.(*taskCopyContext).CopyInIovecs(...)
	pkg/sentry/kernel/task_usermem.go:387
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.doProcessVMReadWrite(0xc0061faa80, 0xc0077e8a80, 0x40000002?, 0x0?, 0x0?, 0x0?)
	pkg/sentry/syscalls/linux/vfs2/mmap.go:166 +0x325 fp=0xc0042d73f8 sp=0xc0042d7258 pc=0x1169985
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.processVMRW(0xc003392000, {{0x1492}, {0x20001300}, {0x2}, {0x20003700}, {0xa}, {0x0}}, 0x1)
	pkg/sentry/syscalls/linux/vfs2/mmap.go:152 +0x1c5 fp=0xc0042d7490 sp=0xc0042d73f8 pc=0x1169445
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.ProcessVMWritev(0xc0042d7578?, {{0x1492}, {0x20001300}, {0x2}, {0x20003700}, {0xa}, {0x0}})
	pkg/sentry/syscalls/linux/vfs2/mmap.go:114 +0x59 fp=0xc0042d7508 sp=0xc0042d7490 pc=0x1169219
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc003392000, 0x137, {{0x1492}, {0x20001300}, {0x2}, {0x20003700}, {0xa}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9b8 fp=0xc0042d7a18 sp=0xc0042d7508 pc=0xd5a1f8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc003392000, 0x0?, {{0x1492}, {0x20001300}, {0x2}, {0x20003700}, {0xa}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc0042d7ab0 sp=0xc0042d7a18 pc=0xd5bf5d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001383bc0?, 0xc004fc16c0?, {{0x1492}, {0x20001300}, {0x2}, {0x20003700}, {0xa}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f fp=0xc0042d7b28 sp=0xc0042d7ab0 pc=0xd5b94f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc003392000)
	pkg/sentry/kernel/task_syscall.go:257 +0x496 fp=0xc0042d7c50 sp=0xc0042d7b28 pc=0xd5b4f6
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc003392000?, 0xc003392000)
	pkg/sentry/kernel/task_run.go:253 +0x18f9 fp=0xc0042d7ec0 sp=0xc0042d7c50 pc=0xd46819
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc003392000, 0x5214)
	pkg/sentry/kernel/task_run.go:94 +0x354 fp=0xc0042d7fb0 sp=0xc0042d7ec0 pc=0xd445b4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:370 +0x48 fp=0xc0042d7fe0 sp=0xc0042d7fb0 pc=0xd57de8
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc0042d7fe8 sp=0xc0042d7fe0 pc=0x46df01
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:370 +0x1a8