diff options
Diffstat (limited to 'main/lua5.3/CVE-2019-6706-use-after-free-lua_upvaluejoin.patch')
-rw-r--r-- | main/lua5.3/CVE-2019-6706-use-after-free-lua_upvaluejoin.patch | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/main/lua5.3/CVE-2019-6706-use-after-free-lua_upvaluejoin.patch b/main/lua5.3/CVE-2019-6706-use-after-free-lua_upvaluejoin.patch new file mode 100644 index 0000000000..ea26696fda --- /dev/null +++ b/main/lua5.3/CVE-2019-6706-use-after-free-lua_upvaluejoin.patch @@ -0,0 +1,24 @@ +http://lua.2524044.n2.nabble.com/CVE-2019-6706-use-after-free-in-lua-upvaluejoin-function-tc7685575.html + +--- a/src/lapi.c ++++ b/src/lapi.c +@@ -1285,14 +1285,14 @@ LUA_API void *lua_upvalueid (lua_State * + + LUA_API void lua_upvaluejoin (lua_State *L, int fidx1, int n1, + int fidx2, int n2) { +- LClosure *f1; +- UpVal **up1 = getupvalref(L, fidx1, n1, &f1); ++ UpVal **up1 = getupvalref(L, fidx1, n1, NULL); /* the last parameter not needed */ + UpVal **up2 = getupvalref(L, fidx2, n2, NULL); ++ if (*up1 == *up2) return; /* Already joined */ ++ (*up2)->refcount++; ++ if (upisopen(*up2)) (*up2)->u.open.touched = 1; ++ luaC_upvalbarrier(L, *up2); + luaC_upvdeccount(L, *up1); + *up1 = *up2; +- (*up1)->refcount++; +- if (upisopen(*up1)) (*up1)->u.open.touched = 1; +- luaC_upvalbarrier(L, *up1); + } + + |