panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0xa8 pc=0x1036021] goroutine 1006172 [running]: panic(0x1272ba0, 0x20203e0) GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc0011699d0 sp=0xc001169908 pc=0x437c65 runtime.panicmem() GOROOT/src/runtime/panic.go:212 +0x5b fp=0xc0011699f0 sp=0xc0011699d0 pc=0x435cbb runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:734 +0x173 fp=0xc001169a28 sp=0xc0011699f0 pc=0x44fa93 gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).callFuture(0xc096b873e0, 0xc006dee000, 0xc08b532960, 0x0, 0x0, 0x0) pkg/sentry/fsimpl/fuse/connection.go:306 +0xa1 fp=0xc001169aa0 sp=0xc001169a28 pc=0x1036021 gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).Call(0xc096b873e0, 0xc006dee000, 0xc08b532960, 0x1, 0x1d, 0x1602758) pkg/sentry/fsimpl/fuse/connection.go:278 +0x97 fp=0xc001169ae0 sp=0xc001169aa0 pc=0x1035df7 gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).CallAsync(...) pkg/sentry/fsimpl/fuse/connection.go:232 gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*fileDescription).Release(0xc003f42500, 0x1606258, 0xc006dee000) pkg/sentry/fsimpl/fuse/file.go:102 +0x32d fp=0xc001169b58 sp=0xc001169ae0 pc=0x1039eed gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).DecRef.func1() pkg/sentry/vfs/file_description.go:207 +0x2db fp=0xc001169c30 sp=0xc001169b58 pc=0x7b27db gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescriptionRefs).DecRef(0xc003f42500, 0xc001169cb8) bazel-out/k8-fastbuild-ST-4c64f0b3d5c7/bin/pkg/sentry/vfs/file_description_refs.go:152 +0x82 fp=0xc001169ca8 sp=0xc001169c30 pc=0x78dc02 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).DecRef(0xc003f42500, 0x1606258, 0xc006dee000) pkg/sentry/vfs/file_description.go:167 +0x73 fp=0xc001169ce8 sp=0xc001169ca8 pc=0x786eb3 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).dropVFS2(0xc00a0fcd00, 0x1606258, 0xc006dee000, 0xc003f42500) pkg/sentry/kernel/fd_table.go:196 +0x88 fp=0xc001169d50 sp=0xc001169ce8 pc=0xa37dc8 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).RemoveIf(0xc00a0fcd00, 0x1606258, 0xc006dee000, 0x148eea0) pkg/sentry/kernel/fd_table.go:845 +0x225 fp=0xc001169e08 sp=0xc001169d50 pc=0xa3ab45 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).DecRef.func1() pkg/sentry/kernel/fd_table.go:214 +0x52 fp=0xc001169e38 sp=0xc001169e08 pc=0xaa3c12 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTableRefs).DecRef(0xc00a0fcd00, 0xc001169ec0) bazel-out/k8-fastbuild-ST-4c64f0b3d5c7/bin/pkg/sentry/kernel/fd_table_refs.go:152 +0x82 fp=0xc001169eb0 sp=0xc001169e38 pc=0xa3b242 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).DecRef(0xc00a0fcd00, 0x1606258, 0xc006dee000) pkg/sentry/kernel/fd_table.go:212 +0x73 fp=0xc001169ef0 sp=0xc001169eb0 pc=0xa380b3 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0x0, 0xc006dee000, 0x15d88a0, 0x0) pkg/sentry/kernel/task_exit.go:279 +0x217 fp=0xc001169f68 sp=0xc001169ef0 pc=0xa6b8d7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc006dee000, 0x6bc3) pkg/sentry/kernel/task_run.go:98 +0x1b9 fp=0xc001169fd0 sp=0xc001169f68 pc=0xa768f9 runtime.goexit() src/runtime/asm_amd64.s:1371 +0x1 fp=0xc001169fd8 sp=0xc001169fd0 pc=0x472861 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:398 +0x116