Fix buffer-overflow in grpc_static_mdelem_for_static_strings

src/core/lib/transport/static_metadata.cc

@@ -1217,12 +1217,7 @@ static const uint16_t elem_keys[] = {
     9076,  9185,  9294, 9403,  9512,  9621, 6242,  9730, 9839, 9948, 10057,
     10166, 1189,  538,  10275, 10384, 212,  10493, 1195, 1196, 1197, 1198,
     1080,  10602, 1843, 11365, 0,     0,    0,     1734, 0,    1850, 0,
-    0,     0,     356,  1627,  0,     0,    0,     0,    0,    0,    0,
+    0,     0,     356,  1627};
-    0,     0,     0,    0,     0,     0,    0,     0,    0,    0,    0,
-    0,     0,     0,    0,     0,     0,    0,     0,    0,    0,    0,
-    0,     0,     0,    0,     0,     0,    0,     0,    0,    0,    0,
-    0,     0,     0,    0,     0,     0,    0,     0,    0,    0,    0,
-    0,     0,     0,    0,     0,     0,    0,     0,    0};
 static const uint8_t elem_idxs[] = {
     7,  8,   9,   10,  11, 12,  13, 76,  78,  71,  1,  2,  5,  6,  25, 3,
     4,  66,  65,  30,  83, 62,  63, 67,  61,  73,  57, 37, 14, 19, 21, 22,

tools/codegen/core/gen_static_metadata.py

@@ -627,7 +627,6 @@ def perfect_hash(keys, name):
         return x + p.r[y]
 
     return {
-        'PHASHRANGE': p.t - 1 + max(p.r),
         'PHASHNKEYS': len(p.slots),
         'pyfunc': f,
         'code': """
@@ -659,7 +658,7 @@ elem_keys = [
 elem_hash = perfect_hash(elem_keys, 'elems')
 print >> C, elem_hash['code']
 
-keys = [0] * int(elem_hash['PHASHRANGE'])
+keys = [0] * int(elem_hash['PHASHNKEYS'])
 idxs = [255] * int(elem_hash['PHASHNKEYS'])
 for i, k in enumerate(elem_keys):
     h = elem_hash['pyfunc'](k)