00:04:44 executing program 1:
r0 = socket$inet_sctp(0x2, 0x1, 0x84)
getsockopt$inet_sctp_SCTP_PR_STREAM_STATUS(r0, 0x84, 0x107, &(0x7f0000000040), &(0x7f0000000080)=0x18)
00:04:44 executing program 3:
syz_emit_ethernet(0x56, &(0x7f0000000200)={@local, @empty, @val, {@ipv4}}, 0x0)
panic: replaceArg: group fields don't match: 0/1

goroutine 25 [running]:
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x4020552e00?}, {0x9fabc8?, 0x4025908640?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:377 +0x3fc
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x4020552ea0?}, {0x9fabc8?, 0x4025908500?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x328
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x4020552ec0?}, {0x9fabc8?, 0x4025908420?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x328
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x4020552f40?}, {0x9fabc8?, 0x4025908340?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x328
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x4020553000?}, {0x9fabc8?, 0x4025908320?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x328
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x4020553200?}, {0x9fabc8?, 0x40259082e0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x328
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x40205533a0?}, {0x9fabc8?, 0x40259082c0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x328
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x4020553400?}, {0x9fabc8?, 0x40259082a0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x328
github.com/google/syzkaller/prog.replaceArg({0x9fabc8?, 0x4020553420?}, {0x9fabc8?, 0x4025908280?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x328
github.com/google/syzkaller/prog.(*StructType).mutate(0x1251c60, 0x40204ca7a0, 0x4001d01e00, {0x9fabc8, 0x4020553440?}, {0x4001d01a48, {0x19146e0, 0x4, 0x4}, 0x40258719b0, ...})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:490 +0x170
github.com/google/syzkaller/prog.(*Target).mutateArg(0x401c183180?, 0x40267e9b30?, 0x4?, {0x9fabc8, 0x4020553440}, {0x4001d01a48, {0x19146e0, 0x4, 0x4}, 0x40258719b0, ...}, ...)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:245 +0xc0
github.com/google/syzkaller/prog.(*mutator).mutateArg(0x40045c1d48)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:196 +0x1f4
github.com/google/syzkaller/prog.(*Prog).Mutate(0x4022d60fc0, {0x9f6e48?, 0x401deb4390}, 0x1e, 0x401ee2e280, 0x400007ee70, {0x4021180000, 0x10048, 0x11000})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:51 +0x224
main.(*Proc).smashInput(0x401ee2e3c0, 0x401d700bd0)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:221 +0x10c
main.(*Proc).loop(0x401ee2e3c0)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:78 +0xf4
created by main.main in goroutine 1
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:336 +0x1288