ioctl$EVIOCGMASK(r1, 0x80104592, &(0x7f0000000200)={0x0, 0x98, &(0x7f0000000140)="5068e69c123c34c6d781689081cadfeccb6a72bd17d3a7b571575d82228cfd88c8501e92e00a3eafe66a03a1620fadf5820924b708404998ed4b0856ad208c04d60fbaf20aa7fe5427854a147b36bed3d302823989ec1f3a0f1402196b74fba1cee58433b264b64bcc1ddcafde8b8131c38479aabf91038315c44420a5b275884dddbafacbaa5a09e3e0d116b16351a14438afda47a9b2ee"})
panic: replaceArg: group fields don't match: 0/1

goroutine 25 [running]:
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc0004355a0?}, {0xe56770?, 0xc000435f60?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:377 +0x425
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc000435520?}, {0xe56770?, 0xc000435d60?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc0004354a0?}, {0xe56770?, 0xc000435b60?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc000435480?}, {0xe56770?, 0xc000435b40?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc000435460?}, {0xe56770?, 0xc000435b20?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc000435440?}, {0xe56770?, 0xc000435b00?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc000435420?}, {0xe56770?, 0xc000435ae0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc000435400?}, {0xe56770?, 0xc000435ac0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc0004353e0?}, {0xe56770?, 0xc000435aa0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.(*StructType).mutate(0x16d4620, 0xc000435620, 0xc00110ab40, {0xe56770, 0xc0004353c0?}, {0xc00110a968, {0x1db7580, 0x4, 0x4}, 0xc0011224e0, ...})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:490 +0x185
github.com/google/syzkaller/prog.(*Target).mutateArg(0x0?, 0xc000560380?, 0xc001083dc8?, {0xe56770, 0xc0004353c0}, {0xc00110a968, {0x1db7580, 0x4, 0x4}, 0xc0011224e0, ...}, ...)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:245 +0xe2
github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc001083e48)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:196 +0x245
github.com/google/syzkaller/prog.(*Prog).Mutate(0xc001109fc0, {0xe52aa8?, 0xc000e569f0}, 0x1e, 0xc00051e040, 0xc000088840, {0xc0002d9500, 0x2b1, 0x350})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:51 +0x2ba
main.(*Proc).loop(0xc00051e600)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:95 +0x365
created by main.main in goroutine 1
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:336 +0x1665