From 3009ec9852316c3c696f77f476390ab5a6d8d6d7 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Tue, 17 Oct 2017 21:47:32 +0200
Subject: fusefrontend: clamp oversized reads

Our byte cache pools are sized acc. to MAX_KERNEL_WRITE, but the
running kernel may have a higher limit set. Clamp to what we can
handle.

Fixes a panic on a Synology NAS reported at
https://github.com/rfjakob/gocryptfs/issues/145
---
 internal/contentenc/content.go | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'internal/contentenc/content.go')

diff --git a/internal/contentenc/content.go b/internal/contentenc/content.go
index f48080f..e6f79a6 100644
--- a/internal/contentenc/content.go
+++ b/internal/contentenc/content.go
@@ -194,6 +194,8 @@ func (be *ContentEnc) DecryptBlock(ciphertext []byte, blockNo uint64, fileID []b
 const encryptMaxSplit = 2
 
 // EncryptBlocks is like EncryptBlock but takes multiple plaintext blocks.
+// Returns a byte slice from CReqPool - so don't forget to return it
+// to the pool.
 func (be *ContentEnc) EncryptBlocks(plaintextBlocks [][]byte, firstBlockNo uint64, fileID []byte) []byte {
 	ciphertextBlocks := make([][]byte, len(plaintextBlocks))
 	// For large writes, we parallelize encryption.
-- 
cgit v1.2.3