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fix: check for nil bcastDict (#10646)

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Also hold the lock when checking the length of the blocks in the
bcastDict.
This commit is contained in:
Steven Allen 2023-04-17 20:17:10 -07:00 committed by GitHub
parent 0befed7200
commit e945c0d6f2
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 2 deletions
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10
chain/sub/bcast/consistent.go
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@ -151,16 +151,22 @@ func (cb *ConsistentBCast) RcvBlock(ctx context.Context, blk *types.BlockMsg) {
// be held off for a bit more time.
func (cb *ConsistentBCast) WaitForDelivery(bh *types.BlockHeader) error {
cb.lk.RLock()
bcastDict := cb.m[bh.Height]
defer cb.lk.RUnlock()
bcastDict, ok := cb.m[bh.Height]
if !ok {
return xerrors.Errorf("block at height %d garbage collected before it could be processed", bh.Height)
}
key := BCastKey(bh)
bInfo, ok := bcastDict.load(key)
cb.lk.RUnlock()
if !ok {
return xerrors.Errorf("something went wrong, unknown block with Epoch + VRFProof (cid=%s) in consistent broadcast storage", key)
}
// Wait for the timeout
cb.lk.RUnlock()
<-bInfo.ctx.Done()
cb.lk.RLock()
if bcastDict.blkLen(key) > 1 {
return xerrors.Errorf("equivocation detected for epoch %d. Two blocks being broadcast with same VRFProof", bh.Height)
}