syzbot

WARNING: DATA RACE
Read at 0x00c42046e270 by goroutine 126:
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc.forEachMountSource()
      pkg/sentry/kernel/task_resources.go:103 +0x5a
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc.(*mountInfoFile).ReadSeqFileData()
      pkg/sentry/fs/proc/mounts.go:74 +0x103
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile.(*SeqFile).updateSourceLocked()
      pkg/sentry/fs/proc/seqfile/seqfile.go:225 +0xec
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile.(*SeqFile).DeprecatedPreadv()
      pkg/sentry/fs/proc/seqfile/seqfile.go:190 +0x616
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil.(*Handle).Read()
      pkg/sentry/fs/fsutil/handle.go:90 +0xbd
  gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Preadv()
      pkg/sentry/fs/file.go:248 +0x13c
  gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.preadv()
      pkg/sentry/syscalls/linux/sys_read.go:234 +0xae
  gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Preadv()
      pkg/sentry/syscalls/linux/sys_read.go:185 +0x2f2
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall()
      pkg/sentry/kernel/task_syscall.go:162 +0x14e
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke()
      pkg/sentry/kernel/task_syscall.go:278 +0x7d
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter()
      pkg/sentry/kernel/task_syscall.go:241 +0xc3
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall()
      pkg/sentry/kernel/task_syscall.go:216 +0x19c
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute()
      pkg/sentry/kernel/task_run.go:217 +0x157c
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:95 +0x264

Previous write at 0x00c42046e270 by goroutine 121:
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*TaskResources).release()
      pkg/sentry/kernel/task_resources.go:57 +0xb2
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runExitMain).execute()
      pkg/sentry/kernel/task_exit.go:262 +0x167
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:95 +0x264