From c89a3d536891da84403b025c70f1ae225faa0eb2 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Thu, 1 Mar 2018 15:00:58 -0600
Subject: don't allocate large buffers on the stack

---
 src/nix-daemon/nix-daemon.cc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'src/nix-daemon')

diff --git a/src/nix-daemon/nix-daemon.cc b/src/nix-daemon/nix-daemon.cc
index 890bffa19aa5..c3b94614a879 100644
--- a/src/nix-daemon/nix-daemon.cc
+++ b/src/nix-daemon/nix-daemon.cc
@@ -37,13 +37,13 @@ using namespace nix;
 static ssize_t splice(int fd_in, void *off_in, int fd_out, void *off_out, size_t len, unsigned int flags)
 {
     /* We ignore most parameters, we just have them for conformance with the linux syscall */
-    char buf[8192];
-    auto read_count = read(fd_in, buf, sizeof(buf));
+    std::vector<char> buf(8192);
+    auto read_count = read(fd_in, buf.data(), buf.size());
     if (read_count == -1)
         return read_count;
     auto write_count = decltype(read_count)(0);
     while (write_count < read_count) {
-        auto res = write(fd_out, buf + write_count, read_count - write_count);
+        auto res = write(fd_out, buf.data() + write_count, read_count - write_count);
         if (res == -1)
             return res;
         write_count += res;
-- 
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