gofuzz openpgp ReadMessage() crasher

1e5058a2efade00c9405b4544cfb3917045486de.output

SIGABRT: abort
PC=0x437102

goroutine 1 [running]:
runtime.memclr(0xc2080367d0, 0x50)
	/tmp/go-fuzz-build851796584/src/runtime/memclr_amd64.s:97 +0x162 fp=0xc20805c738 sp=0xc20805c730
runtime.mallocgc(0x50, 0x5fa140, 0x760610b400000001, 0x472e0c)
	/tmp/go-fuzz-build851796584/src/runtime/malloc.go:190 +0x92b fp=0xc20805c7e8 sp=0xc20805c738
runtime.newobject(0x5fa140, 0x8)
	/tmp/go-fuzz-build851796584/src/runtime/malloc.go:353 +0x49 fp=0xc20805c810 sp=0xc20805c7e8
golang.org/x/crypto/cast5.NewCipher(0xc20800a4a0, 0x10, 0x10, 0x8, 0x0, 0x0)
	/tmp/go-fuzz-build851796584/src/golang.org/x/crypto/cast5/cast5.go:31 +0x1f5 fp=0xc20805c860 sp=0xc20805c810
golang.org/x/crypto/openpgp/packet.CipherFunction.new(0x7fbf281c5c03, 0xc20800a4a0, 0x10, 0x10, 0x0, 0x0)
	/tmp/go-fuzz-build851796584/src/golang.org/x/crypto/openpgp/packet/packet.go:689 +0x17d fp=0xc20805c8a8 sp=0xc20805c860
golang.org/x/crypto/openpgp/packet.(*SymmetricallyEncrypted).Decrypt(0xc20803c4b0, 0xc20800a703, 0xc20800a4a0, 0x10, 0x10, 0x0, 0x0, 0x0, 0x0)
	/tmp/go-fuzz-build851796584/src/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go:110 +0x616 fp=0xc20805c9e0 sp=0xc20805c8a8
golang.org/x/crypto/openpgp.ReadMessage(0x7fbf281c5b60, 0xc2080120e0, 0x7fbf281c5b88, 0x717130, 0x6719a8, 0x0, 0xc208060000, 0x0, 0x0)
	/tmp/go-fuzz-build851796584/src/golang.org/x/crypto/openpgp/read.go:268 +0x10f0 fp=0xc20805cdf8 sp=0xc20805c9e0
github.com/marete/gofuzz/openpgp/symmetric-unsigned/fuzz.Fuzz(0x7fbf27f44000, 0x23, 0x100000, 0x10)
	/tmp/go-fuzz-build851796584/src/github.com/marete/gofuzz/openpgp/symmetric-unsigned/fuzz/main.go:56 +0x1ca fp=0xc20805cef8 sp=0xc20805cdf8
github.com/dvyukov/go-fuzz/go-fuzz-dep.Main(0x6719a0)
	/home/marebri/devel/go/src/github.com/dvyukov/go-fuzz/go-fuzz-dep/main.go:43 +0xe8 fp=0xc20805cf88 sp=0xc20805cef8
main.main()
	/tmp/go-fuzz-build851796584/src/go-fuzz-main/main.go:10 +0x2a fp=0xc20805cf98 sp=0xc20805cf88
runtime.main()
	/tmp/go-fuzz-build851796584/src/runtime/proc.go:63 +0xf3 fp=0xc20805cfe0 sp=0xc20805cf98
runtime.goexit()
	/tmp/go-fuzz-build851796584/src/runtime/asm_amd64.s:2232 +0x1 fp=0xc20805cfe8 sp=0xc20805cfe0

rax     0x0
rbx     0x50
rcx     0xc2080367d0
rdx     0x7fbf281b4000
rdi     0xc2080367d0
rsi     0x7fbf281b8820
rbp     0x0
rsp     0xc20805c730
r8      0x0
r9      0x50
r10     0x50
r11     0x5fa140
r12     0xa
r13     0xb8
r14     0x95b3c9e1906feda0
r15     0xa68ef3014e70d198
rip     0x437102
rflags  0x283
cs      0x33
fs      0x0
gs      0x0
exit status 2