panic: sandbox escaping file name "../file0" goroutine 17 [running]: github.com/google/syzkaller/prog.(*randGen).filename(0xc000743bc0, 0xc000748540, 0xbf51e0, 0xc00085dd00, 0xc00085d958) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:161 +0x2ac github.com/google/syzkaller/prog.(*BufferType).generate(0xbf51e0, 0xc000743bc0, 0xc000748540, 0xc00007aa00, 0x5f97a6cb67a3c44, 0xc00085d9e8, 0x4f0c53, 0xc000718690) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:646 +0x4fc github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc000743bc0, 0xc000748540, 0x8fd600, 0xbf51e0, 0x300, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:581 +0x1b6 github.com/google/syzkaller/prog.(*randGen).generateArg(0xc000743bc0, 0xc000748540, 0x8fd600, 0xbf51e0, 0xaaaaaaaaaaaaaaaa, 0x38, 0x7437b2, 0x87a299, 0x3) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:530 +0x52 github.com/google/syzkaller/prog.(*PtrType).generate(0xbd1f60, 0xc000743bc0, 0xc000748540, 0x40b7ff, 0xc000756e10, 0x30, 0x30, 0x8115a0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:729 +0x84 github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc000743bc0, 0xc000748540, 0x8fda60, 0xbd1f60, 0xc00085db00, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:581 +0x1b6 github.com/google/syzkaller/prog.(*randGen).generateArg(0xc000743bc0, 0xc000748540, 0x8fda60, 0xbd1f60, 0x3, 0x3, 0x0, 0x203000, 0xc00085dce8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:530 +0x52 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc000743bc0, 0xc000748540, 0xbc88e0, 0x3, 0x3, 0xb168122dac0ed5c3, 0xc00085ddb0, 0x72beae, 0x7f3580, 0xc0006efa70, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:518 +0x11d github.com/google/syzkaller/prog.(*randGen).generateParticularCall(0xc000743bc0, 0xc000748540, 0xbdd6c0, 0x74, 0xc000748540, 0xc00053ec90) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:462 +0xd1 github.com/google/syzkaller/prog.(*randGen).generateCall(0xc000743bc0, 0xc000748540, 0xc0007484c0, 0xc000748540, 0xc00085de48, 0x7311e7) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:454 +0xa4 github.com/google/syzkaller/prog.(*mutator).insertCall(0xc00085ded0, 0x14) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:118 +0xcb github.com/google/syzkaller/prog.(*Prog).Mutate(0xc0007484c0, 0x8f8660, 0xc000718690, 0x1e, 0xc000601800, 0xc000486000, 0x98b, 0xc00) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:32 +0x299 main.(*Proc).loop(0xc000601880) /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 ll