syzbot

fatal error: I0629 14:29:16.842589   50783 x:0] [ 18739] Error opening /bin/sh: no such file or directory
I0629 14:29:16.842613   50783 x:0] [ 18739] Failed to load /bin/sh: no such file or directory
runtime: cannot allocate memory

runtime stack:
runtime.throw(0xbca77e, 0x1f)
	GOROOT/src/runtime/panic.go:616 +0x81
runtime.newArenaMayUnlock(0x10b8a80)
	GOROOT/src/runtime/mheap.go:1699 +0xda
runtime.newMarkBits(0x55, 0x2000)
	GOROOT/src/runtime/mheap.go:1619 +0xb3
runtime.newAllocBits(0x55, 0x7f81458f1ff0)
	GOROOT/src/runtime/mheap.go:1654 +0x2b
runtime.heapBits.initSpan(0xc41fe780ff, 0xc400000000, 0x7f816f9c1ec0)
	GOROOT/src/runtime/mbitmap.go:722 +0x90
runtime.(*mcentral).grow(0x10bf9b0, 0x0)
	GOROOT/src/runtime/mcentral.go:240 +0xec
runtime.(*mcentral).cacheSpan(0x10bf9b0, 0xbde4a0)
	GOROOT/src/runtime/mcentral.go:106 +0x2e4
runtime.(*mcache).refill(0x7f81955d0b20, 0x5c770f)
	GOROOT/src/runtime/mcache.go:123 +0x9c
runtime.(*mcache).nextFree.func1()
	GOROOT/src/runtime/malloc.go:556 +0x32
runtime.systemstack(0x0)
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/linux_amd64_pure_stripped/stdlib~/src/runtime/asm_amd64.s:409 +0x79
runtime.mstart()
	GOROOT/src/runtime/proc.go:1175