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core/vm: avoid escape to heap #33537 (#1944)

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Daniel Liu 2026-01-19 13:55:04 +08:00 committed by GitHub
parent 3e1f75eafb
commit 6aaad7b72f
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 3 additions and 3 deletions
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6
core/vm/contracts.go
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@ -228,11 +228,11 @@ func (c *ecrecover) Run(input []byte) ([]byte, error) {
} }
// We must make sure not to modify the 'input', so placing the 'v' along with // We must make sure not to modify the 'input', so placing the 'v' along with
// the signature needs to be done on a new allocation // the signature needs to be done on a new allocation
sig := make([]byte, crypto.SignatureLength) var sig [crypto.SignatureLength]byte
copy(sig, input[64:128]) copy(sig[:], input[64:128])
sig[64] = v sig[64] = v
// v needs to be at the end for libsecp256k1 // v needs to be at the end for libsecp256k1
pubKey, err := crypto.Ecrecover(input[:32], sig) pubKey, err := crypto.Ecrecover(input[:32], sig[:])
// make sure the public key is a valid one // make sure the public key is a valid one
if err != nil { if err != nil {
return nil, nil return nil, nil