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

goroutine 831410 [running]:
panic({0x16ee920, 0x2544c50})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc000728f18 sp=0xc000728e58 pc=0x438317
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:220
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:818 +0x336 fp=0xc000728f68 sp=0xc000728f18 pc=0x450556
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).IncUsers(0x0)
	pkg/sentry/mm/lifecycle.go:246 +0x2a fp=0xc000728f90 sp=0xc000728f68 pc=0xb7576a
gvisor.dev/gvisor/pkg/sentry/kernel.(*taskCopyContext).getMemoryManager(0xc002d73e00)
	pkg/sentry/kernel/task_usermem.go:353 +0xb5 fp=0xc000728fc8 sp=0xc000728f90 pc=0xd60475
gvisor.dev/gvisor/pkg/sentry/kernel.(*taskCopyContext).CopyInBytes(0xc002d73e00, 0x0?, {0xc007eede44, 0x10, 0x90})
	pkg/sentry/kernel/task_usermem.go:361 +0x77 fp=0xc0007290c0 sp=0xc000728fc8 pc=0xd60557
gvisor.dev/gvisor/pkg/sentry/kernel.makeIovec({0x1bc8058, 0xc002d73e00}, 0xc007eed500, 0xc000729220?, {0xc007eede44, 0x10, 0x90})
	pkg/sentry/kernel/task_usermem.go:261 +0xa4 fp=0xc000729178 sp=0xc0007290c0 pc=0xd5f684
gvisor.dev/gvisor/pkg/sentry/kernel.copyInIovecs({0x1bc8058, 0xc002d73e00}, 0xc007eed500, 0x20004600, 0x2)
	pkg/sentry/kernel/task_usermem.go:231 +0x27f fp=0xc000729258 sp=0xc000729178 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(0xc008952a80, 0xc007eed500, 0x0?, 0xc0ffffffff?, 0xc007d2b101?, 0x1?)
	pkg/sentry/syscalls/linux/vfs2/mmap.go:166 +0x325 fp=0xc0007293f8 sp=0xc000729258 pc=0x1169985
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.processVMRW(0xc008640000, {{0x1ede}, {0x20003580}, {0x4}, {0x20004600}, {0x2}, {0x0}}, 0x1)
	pkg/sentry/syscalls/linux/vfs2/mmap.go:152 +0x1c5 fp=0xc000729490 sp=0xc0007293f8 pc=0x1169445
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.ProcessVMWritev(0xc008640000?, {{0x1ede}, {0x20003580}, {0x4}, {0x20004600}, {0x2}, {0x0}})
	pkg/sentry/syscalls/linux/vfs2/mmap.go:114 +0x59 fp=0xc000729508 sp=0xc000729490 pc=0x1169219
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc008640000, 0x137, {{0x1ede}, {0x20003580}, {0x4}, {0x20004600}, {0x2}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9b8 fp=0xc000729a18 sp=0xc000729508 pc=0xd5a1f8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc008640000, 0x0?, {{0x1ede}, {0x20003580}, {0x4}, {0x20004600}, {0x2}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc000729ab0 sp=0xc000729a18 pc=0xd5bf5d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00789b5f0?, 0xc00739f860?, {{0x1ede}, {0x20003580}, {0x4}, {0x20004600}, {0x2}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f fp=0xc000729b28 sp=0xc000729ab0 pc=0xd5b94f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc008640000)
	pkg/sentry/kernel/task_syscall.go:257 +0x496 fp=0xc000729c50 sp=0xc000729b28 pc=0xd5b4f6
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc008640000?, 0xc008640000)
	pkg/sentry/kernel/task_run.go:253 +0x18f9 fp=0xc000729ec0 sp=0xc000729c50 pc=0xd46819
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc008640000, 0x7a95)
	pkg/sentry/kernel/task_run.go:94 +0x354 fp=0xc000729fb0 sp=0xc000729ec0 pc=0xd445b4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:370 +0x48 fp=0xc000729fe0 sp=0xc000729fb0 pc=0xd57de8
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc000729fe8 sp=0xc000729fe0 pc=0x46df01
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:370 +0x1a8