diff options
Diffstat (limited to 'meta/recipes-devtools/lua/lua/74d99057a5146755e737c479850f87fd0e3b6868.patch')
-rw-r--r-- | meta/recipes-devtools/lua/lua/74d99057a5146755e737c479850f87fd0e3b6868.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/meta/recipes-devtools/lua/lua/74d99057a5146755e737c479850f87fd0e3b6868.patch b/meta/recipes-devtools/lua/lua/74d99057a5146755e737c479850f87fd0e3b6868.patch new file mode 100644 index 0000000000..dcdc04837d --- /dev/null +++ b/meta/recipes-devtools/lua/lua/74d99057a5146755e737c479850f87fd0e3b6868.patch @@ -0,0 +1,43 @@ +From 74d99057a5146755e737c479850f87fd0e3b6868 Mon Sep 17 00:00:00 2001 +From: Roberto Ierusalimschy <roberto@inf.puc-rio.br> +Date: Wed, 3 Nov 2021 15:04:18 -0300 +Subject: [PATCH] Bug: C stack overflow with coroutines + +'coroutine.resume' did not increment counter of C calls when +continuing execution after a protected error (that is, +while running 'precover'). +--- + ldo.c | 6 ++++-- + testes/cstack.lua | 14 ++++++++++++++ + 2 files changed, 18 insertions(+), 2 deletions(-) + +Upstream-Status: Backport [https://github.com/lua/lua/commit/74d99057a5146755e737c479850f87fd0e3b6868.patch] +CVE: CVE-2021-43519 + +diff --git a/src/ldo.c b/src/ldo.c +index d0edc8b4f..66f890364 100644 +--- a/src/ldo.c ++++ b/src/ldo.c +@@ -759,11 +759,10 @@ static void resume (lua_State *L, void *ud) { + StkId firstArg = L->top - n; /* first argument */ + CallInfo *ci = L->ci; + if (L->status == LUA_OK) /* starting a coroutine? */ +- ccall(L, firstArg - 1, LUA_MULTRET, 1); /* just call its body */ ++ ccall(L, firstArg - 1, LUA_MULTRET, 0); /* just call its body */ + else { /* resuming from previous yield */ + lua_assert(L->status == LUA_YIELD); + L->status = LUA_OK; /* mark that it is running (again) */ +- luaE_incCstack(L); /* control the C stack */ + if (isLua(ci)) { /* yielded inside a hook? */ + L->top = firstArg; /* discard arguments */ + luaV_execute(L, ci); /* just continue running Lua code */ +@@ -814,6 +813,9 @@ LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs, + else if (L->status != LUA_YIELD) /* ended with errors? */ + return resume_error(L, "cannot resume dead coroutine", nargs); + L->nCcalls = (from) ? getCcalls(from) : 0; ++ if (getCcalls(L) >= LUAI_MAXCCALLS) ++ return resume_error(L, "C stack overflow", nargs); ++ L->nCcalls++; + luai_userstateresume(L, nargs); + api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs); + status = luaD_rawrunprotected(L, resume, &nargs); |