panic: inconsistent poll.fdMutex

goroutine 39 [running]:
internal/poll.(*fdMutex).rwunlock(0xc0003d7918?, 0xc7?)
	/usr/local/go/src/internal/poll/fd_mutex.go:179 +0xde
internal/poll.(*FD).readUnlock(0xc0006f2420)
	/usr/local/go/src/internal/poll/fd_mutex.go:231 +0x1f
internal/poll.(*FD).Read(0xc0006f2420, {0xc0001442a0, 0xc, 0xc})
	/usr/local/go/src/internal/poll/fd_unix.go:170 +0x351
os.(*File).read(...)
	/usr/local/go/src/os/file_posix.go:29
os.(*File).Read(0xc00035a2f8, {0xc0001442a0?, 0xc0003d7a38?, 0x411ae5?})
	/usr/local/go/src/os/file.go:118 +0x52
io.ReadAtLeast({0xd8f600, 0xc00035a2f8}, {0xc0001442a0, 0xc, 0xc}, 0xc)
	/usr/local/go/src/io/io.go:335 +0x90
io.ReadFull(...)
	/usr/local/go/src/io/io.go:354
github.com/google/syzkaller/pkg/ipc.(*command).exec(0xc0000d6600, 0xc0006e5518?, {0x0, 0x0, 0x0})
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/ipc/ipc.go:789 +0x570
github.com/google/syzkaller/pkg/ipc.(*Env).ExecProg(0xc00077b100, 0xc0006e5518, {0xc0006e7080, 0x508, 0x580})
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/ipc/ipc.go:268 +0x15e
main.(*Proc).executeProgram(0xc000010588, 0xc0006ff220, 0x0)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:127 +0x105
main.(*Proc).execute(0xc000010588?, 0xc0006ff220, 0xc00035a260?)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:103 +0x33
main.(*Proc).loop(0xc000010588)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:46 +0xcc
created by main.startProc in goroutine 1
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:37 +0x10a