cerc-io/plugeth
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eth/downloader: only roll back light sync if not fully validating

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Péter Szilágyi 2020-09-09 14:06:32 +03:00
parent 8d35b1eb2b
commit 367f12f734
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GPG Key ID: E9AE538CEDF8293D
2 changed files with 12 additions and 11 deletions
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16
eth/downloader/downloader.go
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@ -1501,18 +1501,20 @@ func (d *Downloader) processHeaders(origin uint64, pivot uint64, td *big.Int) er
rollbackErr = err
// If some headers were inserted, track them as uncertain
if n > 0 && rollback == 0 {
if (mode == FastSync || frequency > 1) && n > 0 && rollback == 0 {
rollback = chunk[0].Number.Uint64()
}
log.Debug("Invalid header encountered", "number", chunk[n].Number, "hash", chunk[n].Hash(), "parent", chunk[n].ParentHash, "err", err)
log.Warn("Invalid header encountered", "number", chunk[n].Number, "hash", chunk[n].Hash(), "parent", chunk[n].ParentHash, "err", err)
return fmt.Errorf("%w: %v", errInvalidChain, err)
}
// All verifications passed, track all headers within the alloted limits
head := chunk[len(chunk)-1].Number.Uint64()
if head-rollback > uint64(fsHeaderSafetyNet) {
rollback = head - uint64(fsHeaderSafetyNet)
} else {
rollback = 1
if mode == FastSync {
head := chunk[len(chunk)-1].Number.Uint64()
if head-rollback > uint64(fsHeaderSafetyNet) {
rollback = head - uint64(fsHeaderSafetyNet)
} else {
rollback = 1
}
}
}
// Unless we're doing light chains, schedule the headers for associated content retrieval

7
eth/downloader/downloader_test.go
View File

@ -1020,10 +1020,9 @@ func testShiftedHeaderAttack(t *testing.T, protocol int, mode SyncMode) {
// Tests that upon detecting an invalid header, the recent ones are rolled back
// for various failure scenarios. Afterwards a full sync is attempted to make
// sure no state was corrupted.
func TestInvalidHeaderRollback63Fast(t *testing.T) { testInvalidHeaderRollback(t, 63, FastSync) }
func TestInvalidHeaderRollback64Fast(t *testing.T) { testInvalidHeaderRollback(t, 64, FastSync) }
func TestInvalidHeaderRollback65Fast(t *testing.T) { testInvalidHeaderRollback(t, 65, FastSync) }
func TestInvalidHeaderRollback65Light(t *testing.T) { testInvalidHeaderRollback(t, 65, LightSync) }
func TestInvalidHeaderRollback63Fast(t *testing.T) { testInvalidHeaderRollback(t, 63, FastSync) }
func TestInvalidHeaderRollback64Fast(t *testing.T) { testInvalidHeaderRollback(t, 64, FastSync) }
func TestInvalidHeaderRollback65Fast(t *testing.T) { testInvalidHeaderRollback(t, 65, FastSync) }
func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
t.Parallel()