panic: sandbox escaping file name "../file0" goroutine 17 [running]: github.com/google/syzkaller/prog.(*randGen).filename(0xc000493140, 0xc0006f1d00, 0xbf78a0, 0x203000, 0xc000061798) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:161 +0x2ac github.com/google/syzkaller/prog.(*BufferType).generate(0xbf78a0, 0xc000493140, 0xc0006f1d00, 0xc00007aa00, 0x53040e9528371885, 0xc0008fb9e8, 0x4f0c53, 0xc0007d37d0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:646 +0x4fc github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc000493140, 0xc0006f1d00, 0x8fd600, 0xbf78a0, 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(0xc000493140, 0xc0006f1d00, 0x8fd600, 0xbf78a0, 0x254be3000, 0x0, 0x7437b2, 0x87a299, 0x3) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:530 +0x52 github.com/google/syzkaller/prog.(*PtrType).generate(0xbd8260, 0xc000493140, 0xc0006f1d00, 0x40b7ff, 0xc000695790, 0x10, 0x10, 0x8115a0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:729 +0x84 github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc000493140, 0xc0006f1d00, 0x8fda60, 0xbd8260, 0xc0008fbb00, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:581 +0x1b6 github.com/google/syzkaller/prog.(*randGen).generateArg(0xc000493140, 0xc0006f1d00, 0x8fda60, 0xbd8260, 0x1, 0x1, 0x0, 0x203000, 0xc0008fbce8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:530 +0x52 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc000493140, 0xc0006f1d00, 0xbc48f0, 0x1, 0x1, 0xe9b1228e302fe26b, 0xc0008fbdb0, 0x72beae, 0x7f3580, 0xc0007d2bd0, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:518 +0x11d github.com/google/syzkaller/prog.(*randGen).generateParticularCall(0xc000493140, 0xc0006f1d00, 0xbe1980, 0xb, 0xc0006f1d00, 0xc0006f1a40) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:462 +0xd1 github.com/google/syzkaller/prog.(*randGen).generateCall(0xc000493140, 0xc0006f1d00, 0xc00076b540, 0xc0006f1d00, 0xc0008fbe48, 0x7311e7) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:454 +0xa4 github.com/google/syzkaller/prog.(*mutator).insertCall(0xc0008fbed0, 0x14) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:118 +0xcb github.com/google/syzkaller/prog.(*Prog).Mutate(0xc00076b540, 0x8f8660, 0xc0007d37d0, 0x1e, 0xc0007d8380, 0xc00034c000, 0x9ed, 0xc00) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:32 +0x299 main.(*Proc).loop(0xc0007d8400) /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 f5HCo9`bli`/͘-L4[7Jx%XJ~7tX