panic: sandbox escaping file name "../file0" goroutine 17 [running]: github.com/google/syzkaller/prog.(*randGen).filename(0xc000757960, 0xc000826780, 0xbf4c40, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:161 +0x2ac github.com/google/syzkaller/prog.(*BufferType).mutate(0xbf4c40, 0xc000757960, 0xc000826780, 0x8fa9e0, 0xc0007a79e0, 0xc000826748, 0xc0007a78f0, 0x0, 0xc0007a7a00, 0x3ae8427505990992, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:264 +0x533 github.com/google/syzkaller/prog.(*Target).mutateArg(0xc0000711e0, 0xc000757960, 0xc000826780, 0x8fa9e0, 0xc0007a79e0, 0xc000826748, 0xc0007a78f0, 0x0, 0x4f0f00, 0xc0006a1e0f, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:172 +0xe3 github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc0006a1ed0, 0xa) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:153 +0x231 github.com/google/syzkaller/prog.(*Prog).Mutate(0xc000826700, 0x8f8660, 0xc0007a6030, 0x1e, 0xc0006a76c0, 0xc000514000, 0x9f8, 0xc00) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:34 +0x2db main.(*Proc).loop(0xc0007c2280) /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: