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lua: add upstream patch to fix 5.3.3 loop parser

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Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Francois Perrad 2016-06-22 10:08:55 +02:00 committed by Peter Korsgaard
parent 841cbf6320
commit 23a9a94f1e
1 changed files with 31 additions and 0 deletions
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31
package/lua/5.3.3/0012-fix-loop-parser.patch Normal file
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@ -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@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);
--