panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0xa8 pc=0x1035f01] goroutine 987371 [running]: panic(0x1272ba0, 0x2020420) GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc0828db9d0 sp=0xc0828db908 pc=0x437c65 runtime.panicmem() GOROOT/src/runtime/panic.go:212 +0x5b fp=0xc0828db9f0 sp=0xc0828db9d0 pc=0x435cbb runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:734 +0x173 fp=0xc0828dba28 sp=0xc0828db9f0 pc=0x44fa93 gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).callFuture(0xc0a2f29680, 0xc0067d8a80, 0xc083669f20, 0x0, 0x0, 0x0) pkg/sentry/fsimpl/fuse/connection.go:306 +0xa1 fp=0xc0828dbaa0 sp=0xc0828dba28 pc=0x1035f01 gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).Call(0xc0a2f29680, 0xc0067d8a80, 0xc083669f20, 0x1, 0x1d, 0x1602798) pkg/sentry/fsimpl/fuse/connection.go:278 +0x97 fp=0xc0828dbae0 sp=0xc0828dbaa0 pc=0x1035cd7 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(0xc011cf6e00, 0x1606298, 0xc0067d8a80) pkg/sentry/fsimpl/fuse/file.go:102 +0x32d fp=0xc0828dbb58 sp=0xc0828dbae0 pc=0x1039dcd gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).DecRef.func1() pkg/sentry/vfs/file_description.go:207 +0x2db fp=0xc0828dbc30 sp=0xc0828dbb58 pc=0x7b27db gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescriptionRefs).DecRef(0xc011cf6e00, 0xc0828dbcb8) bazel-out/k8-fastbuild-ST-4c64f0b3d5c7/bin/pkg/sentry/vfs/file_description_refs.go:152 +0x82 fp=0xc0828dbca8 sp=0xc0828dbc30 pc=0x78dc02 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).DecRef(0xc011cf6e00, 0x1606298, 0xc0067d8a80) pkg/sentry/vfs/file_description.go:167 +0x73 fp=0xc0828dbce8 sp=0xc0828dbca8 pc=0x786eb3 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).dropVFS2(0xc013a7c180, 0x1606298, 0xc0067d8a80, 0xc011cf6e00) pkg/sentry/kernel/fd_table.go:196 +0x88 fp=0xc0828dbd50 sp=0xc0828dbce8 pc=0xa38148 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).RemoveIf(0xc013a7c180, 0x1606298, 0xc0067d8a80, 0x148ef30) pkg/sentry/kernel/fd_table.go:845 +0x225 fp=0xc0828dbe08 sp=0xc0828dbd50 pc=0xa3aec5 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).DecRef.func1() pkg/sentry/kernel/fd_table.go:214 +0x52 fp=0xc0828dbe38 sp=0xc0828dbe08 pc=0xaa3f92 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTableRefs).DecRef(0xc013a7c180, 0xc0828dbec0) bazel-out/k8-fastbuild-ST-4c64f0b3d5c7/bin/pkg/sentry/kernel/fd_table_refs.go:152 +0x82 fp=0xc0828dbeb0 sp=0xc0828dbe38 pc=0xa3b5c2 gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).DecRef(0xc013a7c180, 0x1606298, 0xc0067d8a80) pkg/sentry/kernel/fd_table.go:212 +0x73 fp=0xc0828dbef0 sp=0xc0828dbeb0 pc=0xa38433 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0x0, 0xc0067d8a80, 0x15d88e0, 0x0) pkg/sentry/kernel/task_exit.go:279 +0x217 fp=0xc0828dbf68 sp=0xc0828dbef0 pc=0xa6bc57 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0067d8a80, 0x855c) pkg/sentry/kernel/task_run.go:98 +0x1b9 fp=0xc0828dbfd0 sp=0xc0828dbf68 pc=0xa76c79 runtime.goexit() src/runtime/asm_amd64.s:1371 +0x1 fp=0xc0828dbfd8 sp=0xc0828dbfd0 pc=0x472861 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:398 +0x116