panic: sandbox escaping file name "../file0/file0", Files are map[./file0:true ../file0:true]

goroutine 24 [running]:
github.com/google/syzkaller/prog.(*randGen).filename(0xc000297140, 0xc00042dd00, 0xbf69a0, 0x0, 0x0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:161 +0x2e3
github.com/google/syzkaller/prog.(*BufferType).mutate(0xbf69a0, 0xc000297140, 0xc00042dd00, 0x8faa00, 0xc000398de0, 0xc00042d788, 0xc000398db0, 0x0, 0xc000398e00, 0x2399c8add82fefab, ...)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:264 +0x533
github.com/google/syzkaller/prog.(*Target).mutateArg(0xc0000731e0, 0xc000297140, 0xc00042dd00, 0x8faa00, 0xc000398de0, 0xc00042d788, 0xc000398db0, 0x0, 0x4f0f00, 0xc00027fe0f, ...)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:172 +0xe3
github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc00027fed0, 0xa)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:153 +0x231
github.com/google/syzkaller/prog.(*Prog).Mutate(0xc00042d680, 0x8f8680, 0xc00026bbf0, 0x1e, 0xc000276d00, 0xc000275000, 0x110, 0x200)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:34 +0x2db
main.(*Proc).loop(0xc000276d80)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:99 +0x446created by main.main
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:236 +0xfe2
login: