panic: sandbox escaping file name "../file0/file0" goroutine 17 [running]: github.com/google/syzkaller/prog.(*randGen).filename(0xc000403400, 0xc0004c3380, 0xbf5460, 0x203000, 0xc000060cb8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:161 +0x2ac github.com/google/syzkaller/prog.(*BufferType).generate(0xbf5460, 0xc000403400, 0xc0004c3380, 0xc00007ca00, 0xe136b44e4b95f4f, 0xc00069d9e8, 0x4f0c53, 0xc0006dc4b0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:646 +0x4fc github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc000403400, 0xc0004c3380, 0x8fd600, 0xbf5460, 0x200, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:581 +0x1b6 github.com/google/syzkaller/prog.(*randGen).generateArg(0xc000403400, 0xc0004c3380, 0x8fd600, 0xbf5460, 0xaaaaaaaaaaaaaaaa, 0x38, 0x7437b2, 0x87a299, 0x3) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:530 +0x52 github.com/google/syzkaller/prog.(*PtrType).generate(0xbd2860, 0xc000403400, 0xc0004c3380, 0x40b7ff, 0xc0005ebb90, 0x30, 0x30, 0x8115a0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:729 +0x84 github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc000403400, 0xc0004c3380, 0x8fda60, 0xbd2860, 0xc00069db00, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:581 +0x1b6 github.com/google/syzkaller/prog.(*randGen).generateArg(0xc000403400, 0xc0004c3380, 0x8fda60, 0xbd2860, 0x3, 0x3, 0xc0004c3500, 0x40, 0xc00069dce8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:530 +0x52 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc000403400, 0xc0004c3380, 0xbc8b20, 0x3, 0x3, 0x7a81addd746bded2, 0xc00069ddb0, 0x72beae, 0x7f3580, 0xc0007506f0, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:518 +0x11d github.com/google/syzkaller/prog.(*randGen).generateParticularCall(0xc000403400, 0xc0004c3380, 0xbddde0, 0x85, 0xc0004c3380, 0xc00000dcc8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:462 +0xd1 github.com/google/syzkaller/prog.(*randGen).generateCall(0xc000403400, 0xc0004c3380, 0xc0004c2e80, 0xc0004c3380, 0xc00069de48, 0x7311e7) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:454 +0xa4 github.com/google/syzkaller/prog.(*mutator).insertCall(0xc00069ded0, 0x14) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:118 +0xcb github.com/google/syzkaller/prog.(*Prog).Mutate(0xc0004c2e80, 0x8f8660, 0xc0006dc4b0, 0x1e, 0xc000756500, 0xc0006be000, 0x942, 0xc00) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:32 +0x299 main.(*Proc).loop(0xc0007416c0) /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