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| author | Felix Lange <fjl@users.noreply.github.com> | 2017-12-12 05:47:10 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-12-12 05:47:10 +0800 |
| commit | 2499b1b139d82f2f266ce9c79aebca1568396a51 (patch) | |
| tree | 8165a1285e1e4b56fca8f3ce33c015e37013adca /rlp | |
| parent | e7610eadfee686d7d979e8d23d0b903a78288a13 (diff) | |
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rlp: fix string size check in readKind (#15625)
Issue found by @guidovranken
Diffstat (limited to 'rlp')
| -rw-r--r-- | rlp/raw.go | 2 | ||||
| -rw-r--r-- | rlp/raw_test.go | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/rlp/raw.go b/rlp/raw.go index 6bf1c1df8..2b3f328f6 100644 --- a/rlp/raw.go +++ b/rlp/raw.go @@ -98,7 +98,7 @@ func readKind(buf []byte) (k Kind, tagsize, contentsize uint64, err error) { tagsize = 1 contentsize = uint64(b - 0x80) // Reject strings that should've been single bytes. - if contentsize == 1 && buf[1] < 128 { + if contentsize == 1 && len(buf) > 1 && buf[1] < 128 { return 0, 0, 0, ErrCanonSize } case b < 0xC0: diff --git a/rlp/raw_test.go b/rlp/raw_test.go index bac09d8d4..2aad04210 100644 --- a/rlp/raw_test.go +++ b/rlp/raw_test.go @@ -96,6 +96,7 @@ func TestSplit(t *testing.T) { {input: "F90055", err: ErrCanonSize, rest: "F90055"}, {input: "FA0002FFFF", err: ErrCanonSize, rest: "FA0002FFFF"}, + {input: "81", err: ErrValueTooLarge, rest: "81"}, {input: "8501010101", err: ErrValueTooLarge, rest: "8501010101"}, {input: "C60607080902", err: ErrValueTooLarge, rest: "C60607080902"}, |