WARNING: DATA RACE
Write at 0x00c0003c61b0 by goroutine 346:
  runtime.mapdelete_faststr()
      GOROOT/src/runtime/map_faststr.go:297 +0x0
  gvisor.dev/gvisor/pkg/sentry/fs/fsutil.(*InodeSimpleExtendedAttributes).RemoveXattr()
      pkg/sentry/fs/fsutil/inode.go:265 +0x13f
  gvisor.dev/gvisor/pkg/sentry/fs/tmpfs.(*fileInodeOperations).RemoveXattr()
      <autogenerated>:1 +0x83
  gvisor.dev/gvisor/pkg/sentry/fs.(*Inode).RemoveXattr()
      pkg/sentry/fs/inode.go:293 +0x152
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux.removeXattr()
      pkg/sentry/syscalls/linux/sys_xattr.go:421 +0x155
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux.FRemoveXattr()
      pkg/sentry/syscalls/linux/sys_xattr.go:385 +0x141
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall()
      pkg/sentry/kernel/task_syscall.go:170 +0x44d
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke()
      pkg/sentry/kernel/task_syscall.go:291 +0xb4
DIAGNOSIS:
I0301 05:50:09.810920   26651 main.go:305] ***************************
I0301 05:50:09.811053   26651 main.go:306] Args: [/syzkaller/managers/ptrace-proxy-sandbox-race/current/image -root /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=sandbox -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-proxy-sandbox-race-1]
I0301 05:50:09.812227   26651 main.go:307] Version release-20200219.0-72-gce4d1e45bb88
I0301 05:50:09.812299   26651 main.go:308] PID: 26651
I0301 05:50:09.812381   26651 main.go:309] UID: 0, GID: 0
I0301 05:50:09.812461   26651 main.go:310] Configuration:
I0301 05:50:09.812551   26651 main.go:311] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0301 05:50:09.812627   26651 main.go:312] 		Platform: ptrace
I0301 05:50:09.812708   26651 main.go:313] 		FileAccess: shared, overlay: false
I0301 05:50:09.813112   26651 main.go:314] 		Network: sandbox, logging: false
I0301 05:50:09.813172   26651 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0301 05:50:09.813258   26651 main.go:316] ***************************
W0301 05:50:09.813350   26651 main.go:321] Block the TERM signal. This is only safe in tests!
D0301 05:50:09.813516   26651 container.go:159] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0301 05:50:09.821070   26651 container.go:592] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-1": signal 0
D0301 05:50:09.821240   26651 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0301 05:50:09.821374   26651 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0301 05:50:09.821868   26651 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0301 05:50:09.854125   26651 debug.go:122] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1", PID: 21370
I0301 05:50:09.855733   26651 debug.go:131] Retrieving sandbox stacks
D0301 05:50:09.855832   26651 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0301 05:50:09.856265   26651 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
W0301 05:50:09.856427   26651 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 21370: connection refused
retrieving stacks: connecting to control server at PID 21370: connection refused
W0301 05:50:09.856997   26651 main.go:338] Failure to execute command, err: 1


Error collecting stacks: failed to run ["/syzkaller/managers/ptrace-proxy-sandbox-race/current/image" "-root" "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "-watchdog-action=panic" "-network=none" "-debug" "-alsologtostderr" "-platform=ptrace" "-file-access=shared" "-network=sandbox" "-TESTONLY-unsafe-nonroot" "debug" "-stacks" "--ps" "ci-gvisor-ptrace-proxy-sandbox-race-1"]: exit status 128
I0301 05:50:09.810920   26651 main.go:305] ***************************
I0301 05:50:09.811053   26651 main.go:306] Args: [/syzkaller/managers/ptrace-proxy-sandbox-race/current/image -root /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=sandbox -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-proxy-sandbox-race-1]
I0301 05:50:09.812227   26651 main.go:307] Version release-20200219.0-72-gce4d1e45bb88
I0301 05:50:09.812299   26651 main.go:308] PID: 26651
I0301 05:50:09.812381   26651 main.go:309] UID: 0, GID: 0
I0301 05:50:09.812461   26651 main.go:310] Configuration:
I0301 05:50:09.812551   26651 main.go:311] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0301 05:50:09.812627   26651 main.go:312] 		Platform: ptrace
I0301 05:50:09.812708   26651 main.go:313] 		FileAccess: shared, overlay: false
I0301 05:50:09.813112   26651 main.go:314] 		Network: sandbox, logging: false
I0301 05:50:09.813172   26651 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0301 05:50:09.813258   26651 main.go:316] ***************************
W0301 05:50:09.813350   26651 main.go:321] Block the TERM signal. This is only safe in tests!
D0301 05:50:09.813516   26651 container.go:159] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0301 05:50:09.821070   26651 container.go:592] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-1": signal 0
D0301 05:50:09.821240   26651 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0301 05:50:09.821374   26651 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0301 05:50:09.821868   26651 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0301 05:50:09.854125   26651 debug.go:122] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1", PID: 21370
I0301 05:50:09.855733   26651 debug.go:131] Retrieving sandbox stacks
D0301 05:50:09.855832   26651 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0301 05:50:09.856265   26651 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
W0301 05:50:09.856427   26651 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 21370: connection refused
retrieving stacks: connecting to control server at PID 21370: connection refused
W0301 05:50:09.856997   26651 main.go:338] Failure to execute command, err: 1
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter()
      pkg/sentry/kernel/task_syscall.go:252 +0x109
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall()
      pkg/sentry/kernel/task_syscall.go:227 +0x1b3
  gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute()
      pkg/sentry/kernel/task_run.go:232 +0x1aaa
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:92 +0x320