diff --git a/lib/asyncwrite/asyncwrite.go b/lib/asyncwrite/asyncwrite.go
index 6e653b105..39d016d2d 100644
--- a/lib/asyncwrite/asyncwrite.go
+++ b/lib/asyncwrite/asyncwrite.go
@@ -32,6 +32,10 @@ func (bfw *BackgroundWriter) writeWorker() {
 		pool.Put(data)
 		if writeErr != nil {
 			err = writeErr
+			// Drain remaining buffers from channel to avoid memory leak
+			for remaining := range bfw.ch {
+				pool.Put(remaining)
+			}
 			break
 		}
 	}
@@ -53,6 +57,7 @@ func (bfw *BackgroundWriter) Write(p []byte) (n int, err error) {
 	case bfw.ch <- b:
 		return len(b), nil
 	case err := <-bfw.done:
+		pool.Put(b)
 		return 0, err
 	}
 }
diff --git a/lib/ffi/cunative/decode_sdr.go b/lib/ffi/cunative/decode_sdr.go
index 60b820e91..52aca05e4 100644
--- a/lib/ffi/cunative/decode_sdr.go
+++ b/lib/ffi/cunative/decode_sdr.go
@@ -121,6 +121,8 @@ func Decode(replica, key io.Reader, out io.Writer) error {
 			// Read replica
 			rn, err := io.ReadFull(replica, rbuf)
 			if err != nil && err != io.ErrUnexpectedEOF {
+				pool.Put(rbuf)
+				pool.Put(kbuf)
 				if err == io.EOF {
 					return
 				}
@@ -131,11 +133,15 @@ func Decode(replica, key io.Reader, out io.Writer) error {
 			// Read key
 			kn, err := io.ReadFull(key, kbuf[:rn])
 			if err != nil && err != io.ErrUnexpectedEOF {
+				pool.Put(rbuf)
+				pool.Put(kbuf)
 				errChan <- err
 				return
 			}
 
 			if kn != rn {
+				pool.Put(rbuf)
+				pool.Put(kbuf)
 				errChan <- io.ErrUnexpectedEOF
 				return
 			}
diff --git a/lib/ffi/cunative/decode_snap.go b/lib/ffi/cunative/decode_snap.go
index ab34e312d..63554f99b 100644
--- a/lib/ffi/cunative/decode_snap.go
+++ b/lib/ffi/cunative/decode_snap.go
@@ -122,6 +122,8 @@ func DecodeSnap(spt abi.RegisteredSealProof, commD, commK cid.Cid, key, replica
 			// Read replica
 			rn, err := io.ReadFull(replica, rbuf)
 			if err != nil && err != io.ErrUnexpectedEOF {
+				pool.Put(rbuf)
+				pool.Put(kbuf)
 				if err == io.EOF {
 					return
 				}
@@ -132,11 +134,15 @@ func DecodeSnap(spt abi.RegisteredSealProof, commD, commK cid.Cid, key, replica
 			// Read key
 			kn, err := io.ReadFull(key, kbuf[:rn])
 			if err != nil && err != io.ErrUnexpectedEOF {
+				pool.Put(rbuf)
+				pool.Put(kbuf)
 				errChan <- err
 				return
 			}
 
 			if kn != rn {
+				pool.Put(rbuf)
+				pool.Put(kbuf)
 				errChan <- io.ErrUnexpectedEOF
 				return
 			}
diff --git a/lib/pieceprovider/sector_reader.go b/lib/pieceprovider/sector_reader.go
index 02a7dd406..de3600267 100644
--- a/lib/pieceprovider/sector_reader.go
+++ b/lib/pieceprovider/sector_reader.go
@@ -82,6 +82,7 @@ func (p *SectorReader) ReadPiece(ctx context.Context, sector storiface.SectorRef
 
 			upr, err := fr32.NewUnpadReaderBuf(r, pieceSize.Padded(), buf)
 			if err != nil {
+				pool.Put(buf)
 				r.Close() // nolint
 				return nil, xerrors.Errorf("creating unpadded reader: %w", err)
 			}
@@ -89,6 +90,7 @@ func (p *SectorReader) ReadPiece(ctx context.Context, sector storiface.SectorRef
 			bir := bufio.NewReaderSize(upr, 127)
 			if startOffset > uint64(startOffsetAligned) {
 				if _, err := bir.Discard(startOffsetDiff); err != nil {
+					pool.Put(buf)
 					r.Close() // nolint
 					return nil, xerrors.Errorf("discarding bytes for startOffset: %w", err)
 				}
diff --git a/tasks/pdp/task_prove.go b/tasks/pdp/task_prove.go
index b5772c831..aca6ed8f6 100644
--- a/tasks/pdp/task_prove.go
+++ b/tasks/pdp/task_prove.go
@@ -15,6 +15,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/ipfs/go-cid"
+	pool "github.com/libp2p/go-buffer-pool"
 	"github.com/minio/sha256-simd"
 	"github.com/oklog/ulid"
 	"github.com/samber/lo"
@@ -435,6 +436,7 @@ func (p *ProveTask) proveRoot(ctx context.Context, dataSetID int64, pieceID int6
 		if err != nil {
 			return contract.IPDPTypesProof{}, xerrors.Errorf("failed to build memtree: %w", err)
 		}
+		defer pool.Put(memTree)
 		log.Debugw("provePiece", "rootChallengeOffset", rootChallengeOffset, "challengedLeaf", challengedLeaf)
 
 		mProof, err := proof.MemtreeProof(memTree, challengedLeaf)
@@ -519,6 +521,7 @@ func (p *ProveTask) proveRoot(ctx context.Context, dataSetID int64, pieceID int6
 		if err != nil {
 			return contract.IPDPTypesProof{}, xerrors.Errorf("failed to build memtree: %w", err)
 		}
+		defer pool.Put(memtree)
 
 		// Get challenge leaf in subTree
 		subTreeChallenge := challengedLeaf - startLeaf
@@ -552,6 +555,7 @@ func (p *ProveTask) proveRoot(ctx context.Context, dataSetID int64, pieceID int6
 		if err != nil {
 			return contract.IPDPTypesProof{}, xerrors.Errorf("failed to build memtree from snapshot: %w", err)
 		}
+		defer pool.Put(mtree)
 
 		// Generate merkle proof from snapShot node to commP
 		proofs, err := proof.MemtreeProof(mtree, snapshotNodeIndex)