panic: sandbox escaping file name "../file0" goroutine 16 [running]: github.com/google/syzkaller/prog.(*randGen).filename(0xc0000fdb60, 0xc000777280, 0xbf5460, 0xc0000ed180, 0xc000061318) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:161 +0x2ac github.com/google/syzkaller/prog.(*BufferType).generate(0xbf5460, 0xc0000fdb60, 0xc000777280, 0xc000079500, 0x12cd1b00d09dd152, 0xc0007559e8, 0x4f0c53, 0xc0006b1e30) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:646 +0x4fc github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc0000fdb60, 0xc000777280, 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(0xc0000fdb60, 0xc000777280, 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, 0xc0000fdb60, 0xc000777280, 0x40b7ff, 0xc000712930, 0x30, 0x30, 0x8115a0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:729 +0x84 github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc0000fdb60, 0xc000777280, 0x8fda60, 0xbd2860, 0xc000755b00, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:581 +0x1b6 github.com/google/syzkaller/prog.(*randGen).generateArg(0xc0000fdb60, 0xc000777280, 0x8fda60, 0xbd2860, 0x3, 0x3, 0xc0007772c0, 0x40, 0xc000755ce8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:530 +0x52 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc0000fdb60, 0xc000777280, 0xbc8b20, 0x3, 0x3, 0x90f16fe8b6d1039f, 0xc000755db0, 0x72beae, 0x7f3580, 0xc0006b07b0, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:518 +0x11d github.com/google/syzkaller/prog.(*randGen).generateParticularCall(0xc0000fdb60, 0xc000777280, 0xbddde0, 0x85, 0xc000777280, 0xc00000d8d0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:462 +0xd1 github.com/google/syzkaller/prog.(*randGen).generateCall(0xc0000fdb60, 0xc000777280, 0xc000777200, 0xc000777280, 0xc000755e48, 0x7311e7) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:454 +0xa4 github.com/google/syzkaller/prog.(*mutator).insertCall(0xc000755ed0, 0x14) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:118 +0xcb github.com/google/syzkaller/prog.(*Prog).Mutate(0xc000777200, 0x8f8660, 0xc0006b1e30, 0x1e, 0xc0004341c0, 0xc000634000, 0x8b5, 0x900) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:32 +0x299 main.(*Proc).loop(0xc000434200) /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: