forked from cerc-io/plugeth
rlp: fix string size check in readKind (#15625)
Issue found by @guidovranken
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@ -98,7 +98,7 @@ func readKind(buf []byte) (k Kind, tagsize, contentsize uint64, err error) {
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tagsize = 1
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contentsize = uint64(b - 0x80)
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// Reject strings that should've been single bytes.
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if contentsize == 1 && buf[1] < 128 {
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if contentsize == 1 && len(buf) > 1 && buf[1] < 128 {
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return 0, 0, 0, ErrCanonSize
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}
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case b < 0xC0:
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@ -96,6 +96,7 @@ func TestSplit(t *testing.T) {
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{input: "F90055", err: ErrCanonSize, rest: "F90055"},
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{input: "FA0002FFFF", err: ErrCanonSize, rest: "FA0002FFFF"},
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{input: "81", err: ErrValueTooLarge, rest: "81"},
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{input: "8501010101", err: ErrValueTooLarge, rest: "8501010101"},
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{input: "C60607080902", err: ErrValueTooLarge, rest: "C60607080902"},
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