panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x798 pc=0x9dffcb]

goroutine 197956 [running]:
panic(0xee2da0, 0x19f9890)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc0016b1688 sp=0xc0016b15d0 pc=0x43438d
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:695 +0x3da fp=0xc0016b16b8 sp=0xc0016b1688 pc=0x44b8fa
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Kernel(...)
	pkg/sentry/kernel/task.go:636
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*socketOpsCommon).Release(0xc0014be000, 0x120f7c0, 0x19fae70)
	pkg/sentry/socket/netstack/netstack.go:507 +0x2eb fp=0xc0016b1788 sp=0xc0016b16b8 pc=0x9dffcb
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef.func1(0x120f7c0, 0x19fae70)
	pkg/sentry/fs/file.go:152 +0xaa fp=0xc0016b17e0 sp=0xc0016b1788 pc=0x6a2cea
gvisor.dev/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc0011abef0, 0x120f7c0, 0x19fae70, 0xc0016b1848)
	pkg/refs/refcounter.go:467 +0x17a fp=0xc0016b1828 sp=0xc0016b17e0 pc=0x559bfa
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef(0xc0011abef0, 0x120f7c0, 0x19fae70)
	pkg/sentry/fs/file.go:146 +0x73 fp=0xc0016b1878 sp=0xc0016b1828 pc=0x683673
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).drop(0xc000b9abd0, 0xc0011abef0)
	pkg/sentry/kernel/fd_table.go:148 +0x121 fp=0xc0016b18f8 sp=0xc0016b1878 pc=0x88b8a1
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).setAll(0xc000b9abd0, 0x0, 0xc001a304d0, 0x0, 0xc0004f2d00)
	pkg/sentry/kernel/fd_table_unsafe.go:153 +0x20a fp=0xc0016b1988 sp=0xc0016b18f8 pc=0x88df5a
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).newFDAt(0xc000b9abd0, 0x120f9c0, 0xc0014bc000, 0xc000000000, 0xc001a304d0, 0x0, 0x2b29c7093c00, 0x0, 0x0)
	pkg/sentry/kernel/fd_table.go:443 +0x103 fp=0xc0016b19e0 sp=0xc0016b1988 pc=0x88cff3
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).NewFDAt(...)
	pkg/sentry/kernel/fd_table.go:417
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).NewFDAt(...)
	pkg/sentry/kernel/task.go:836
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Dup3(0xc0014bc000, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:855 +0x128 fp=0xc0016b1a70 sp=0xc0016b19e0 pc=0x916088
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Dup2(0xc0014bc000, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:836 +0x1c9 fp=0xc0016b1b08 sp=0xc0016b1a70 pc=0x915ef9
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0014bc000, 0x21, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1042500, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x122 fp=0xc0016b1c68 sp=0xc0016b1b08 pc=0x8c4422
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0014bc000, 0x21, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc0016b1cf0 sp=0xc0016b1c68 pc=0x8c5606
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0014bc000, 0x21, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x11e2601, 0x100000000000000)
	pkg/sentry/kernel/task_syscall.go:198 +0x96 fp=0xc0016b1d50 sp=0xc0016b1cf0 pc=0x8c5196
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0014bc000, 0x2, 0xc0014bc000)
	pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc0016b1e10 sp=0xc0016b1d50 pc=0x8c4b2c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc0014bc000, 0x11e2640, 0x0)
	pkg/sentry/kernel/task_run.go:275 +0xc18 fp=0xc0016b1f60 sp=0xc0016b1e10 pc=0x8b94f8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0014bc000, 0x1d94)
	pkg/sentry/kernel/task_run.go:93 +0x18b fp=0xc0016b1fd0 sp=0xc0016b1f60 pc=0x8b81cb
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc0016b1fd8 sp=0xc0016b1fd0 pc=0x467d61
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0xfe