panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0xa8 pc=0x1036021] goroutine 1075870 [running]: panic(0x1272ba0, 0x20203e0) GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc01ac1b9d0 sp=0xc01ac1b908 pc=0x437c65 runtime.panicmem() GOROOT/src/runtime/panic.go:212 +0x5b fp=0xc01ac1b9f0 sp=0xc01ac1b9d0 pc=0x435cbb runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:734 +0x173 fp=0xc01ac1ba28 sp=0xc01ac1b9f0 pc=0x44fa93 gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).callFuture(0xc08e2db860, 0xc009cda000, 0xc01a65d080, 0x0, 0x0, 0x0) pkg/sentry/fsimpl/fuse/connection.go:306 +0xa1 fp=0xc01ac1baa0 sp=0xc01ac1ba28 pc=0x1036021 gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).Call(0xc08e2db860, 0xc009cda000, 0xc01a65d080, 0x1, 0x1d, 0x16027b8) pkg/sentry/fsimpl/fuse/connection.go:278 +0x97 fp=0xc01ac1bae0 sp=0xc01ac1baa0 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(0xc05c5b7a00, 0x16062b8, 0xc009cda000) pkg/sentry/fsimpl/fuse/file.go:102 +0x32d fp=0xc01ac1bb58 sp=0xc01ac1bae0 pc=0x1039eed gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).DecRef.func1() pkg/sentry/vfs/file_description.go:207 +0x2db fp=0xc01ac1bc30 sp=0xc01ac1bb58 pc=0x7b27db gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescriptionRefs).DecRef(0xc05c5b7a00, 0xc01ac1bcb8) bazel-out/k8-fastbuild-ST-4c64f0b3d5c7/bin/pkg/sentry/vfs/file_description_refs.go:152 +0x82 fp=0xc01ac1bca8 sp=0xc01ac1bc30 pc=0x78dc02 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).DecRef(0xc05c5b7a00, 0x16062b8, 0xc009cda000) pkg/sentry/vfs/file_description.go:167 +0x73 fp=0xc01ac1bce8 sp=0xc01ac1bca8 pc=0x786eb3 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).dropVFS2(0xc01e797200, 0x16062b8, 0xc009cda000, 0xc05c5b7a00) pkg/sentry/kernel/fd_table.go:196 +0x88 fp=0xc01ac1bd50 sp=0xc01ac1bce8 pc=0xa37dc8 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).RemoveIf(0xc01e797200, 0x16062b8, 0xc009cda000, 0x148eee8) pkg/sentry/kernel/fd_table.go:845 +0x225 fp=0xc01ac1be08 sp=0xc01ac1bd50 pc=0xa3ab45 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).DecRef.func1() pkg/sentry/kernel/fd_table.go:214 +0x52 fp=0xc01ac1be38 sp=0xc01ac1be08 pc=0xaa3c12 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTableRefs).DecRef(0xc01e797200, 0xc01ac1bec0) bazel-out/k8-fastbuild-ST-4c64f0b3d5c7/bin/pkg/sentry/kernel/fd_table_refs.go:152 +0x82 fp=0xc01ac1beb0 sp=0xc01ac1be38 pc=0xa3b242 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).DecRef(0xc01e797200, 0x16062b8, 0xc009cda000) pkg/sentry/kernel/fd_table.go:212 +0x73 fp=0xc01ac1bef0 sp=0xc01ac1beb0 pc=0xa380b3 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0x0, 0xc009cda000, 0x15d8900, 0x0) pkg/sentry/kernel/task_exit.go:279 +0x217 fp=0xc01ac1bf68 sp=0xc01ac1bef0 pc=0xa6b8d7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc009cda000, 0xa4c9) pkg/sentry/kernel/task_run.go:98 +0x1b9 fp=0xc01ac1bfd0 sp=0xc01ac1bf68 pc=0xa768f9 runtime.goexit() src/runtime/asm_amd64.s:1371 +0x1 fp=0xc01ac1bfd8 sp=0xc01ac1bfd0 pc=0x472861 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:398 +0x116