net/haproxy/patches/0005-BUG-MEDIUM-lua-bad-memory-access.patch

   1 From ea3b479be6cacb399a6541a00b1bdce17b0179d0 Mon Sep 17 00:00:00 2001
   2 From: Thierry FOURNIER <thierry.fournier@ozon.io>
   3 Date: Mon, 17 Jul 2017 00:44:40 +0200
   4 Subject: [PATCH 05/18] BUG/MEDIUM: lua: bad memory access
   5
   6 We cannot perform garbage collection on unreferenced thread.
   7 This memory is now free and another Lua process can use it for
   8 other things.
   9
  10 HAProxy is monothread, so this bug doesn't cause crash.
  11
  12 This patch must be backported in 1.6 and 1.7
  13 (cherry picked from commit 7bd10d58d3aecf7cf1e5ee7df01193e07128a52d)
  14
  15 Signed-off-by: Willy Tarreau <w@1wt.eu>
  16 ---
  17  src/hlua.c | 12 +++---------
  18  1 file changed, 3 insertions(+), 9 deletions(-)
  19
  20 diff --git a/src/hlua.c b/src/hlua.c
  21 index eb003558..a998860e 100644
  22 --- a/src/hlua.c
  23 +++ b/src/hlua.c
  24 @@ -895,16 +895,10 @@ void hlua_ctx_destroy(struct hlua *lua)
  25          * the garbage collection.
  26          */
  27         if (lua->flags & HLUA_MUST_GC) {
  28 -               if (!SET_SAFE_LJMP(lua->T))
  29 +               if (!SET_SAFE_LJMP(gL.T))
  30                         return;
  31 -               lua_gc(lua->T, LUA_GCCOLLECT, 0);
  32 -               RESET_SAFE_LJMP(lua->T);
  33 -               if (lua_status(lua->T) != LUA_OK) {
  34 -                       if (!SET_SAFE_LJMP(gL.T))
  35 -                               return;
  36 -                       lua_gc(gL.T, LUA_GCCOLLECT, 0);
  37 -                       RESET_SAFE_LJMP(gL.T);
  38 -               }
  39 +               lua_gc(gL.T, LUA_GCCOLLECT, 0);
  40 +               RESET_SAFE_LJMP(gL.T);
  41         }
  42
  43         lua->T = NULL;
  44 --
  45 2.13.0
  46