[Buildroot] [git commit] lua: add upstream patch to fix 5.3.3 loop parser
Peter Korsgaard
peter at korsgaard.com
Wed Jun 22 08:34:56 UTC 2016
commit: https://git.buildroot.net/buildroot/commit/?id=23a9a94f1e78b51abcf2c84c4366c219726ad001
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master
Signed-off-by: Francois Perrad <francois.perrad at gadz.org>
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
package/lua/5.3.3/0012-fix-loop-parser.patch | 31 ++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/package/lua/5.3.3/0012-fix-loop-parser.patch b/package/lua/5.3.3/0012-fix-loop-parser.patch
new file mode 100644
index 0000000..7b321e5
--- /dev/null
+++ b/package/lua/5.3.3/0012-fix-loop-parser.patch
@@ -0,0 +1,31 @@
+Expression list with four or more expressions in a 'for' loop can crash the interpreter.
+
+Fetch from: https://www.lua.org/bugs.html#5.3.3-1
+
+Signed-off-by: Francois Perrad <francois.perrad at gadz.org>
+
+--- a/src/lparser.c
++++ b/src/lparser.c
+@@ -323,6 +323,8 @@
+ luaK_nil(fs, reg, extra);
+ }
+ }
++ if (nexps > nvars)
++ ls->fs->freereg -= nexps - nvars; /* remove extra values */
+ }
+
+
+@@ -1160,11 +1162,8 @@
+ int nexps;
+ checknext(ls, '=');
+ nexps = explist(ls, &e);
+- if (nexps != nvars) {
++ if (nexps != nvars)
+ adjust_assign(ls, nvars, nexps, &e);
+- if (nexps > nvars)
+- ls->fs->freereg -= nexps - nvars; /* remove extra values */
+- }
+ else {
+ luaK_setoneret(ls->fs, &e); /* close last expression */
+ luaK_storevar(ls->fs, &lh->v, &e);
+--
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