Fix signed/unsigned comparisons

Author: vstinner

Modules/_ssl.c

@@ -5883,7 +5883,8 @@ _ssl_MemoryBIO_read_impl(PySSLMemoryBIO *self, int len)
 {
     int avail, nbytes;
 
-    avail = (int)Py_MIN(BIO_ctrl_pending(self->bio), INT_MAX);
+    size_t pending = BIO_ctrl_pending(self->bio);
+    avail = (int)Py_MIN(pending, (size_t)INT_MAX);
     if ((len < 0) || (len > avail))
         len = avail;
 

Modules/cjkcodecs/cjkcodecs.h

@@ -163,7 +163,7 @@ get_module_state(PyObject *mod)
     do {                                                                   \
         Py_UCS4 _c1 = (c1);                                                \
         Py_UCS4 _c2 = (c2);                                                \
-        if (_PyUnicodeWriter_Prepare(writer, 2, Py_MAX(_c1, c2)) < 0)      \
+        if (_PyUnicodeWriter_Prepare(writer, 2, Py_MAX(_c1, _c2)) < 0)     \
             return MBERR_EXCEPTION;                                        \
         PyUnicode_WRITE(writer->kind, writer->data, writer->pos, _c1);     \
         PyUnicode_WRITE(writer->kind, writer->data, writer->pos + 1, _c2); \

Objects/obmalloc.c

@@ -3255,10 +3255,10 @@ _PyMem_DebugRawRealloc(void *ctx, void *p, size_t nbytes)
     }
     else {
         size_t i = original_nbytes - ERASED_SIZE;
-        memcpy(data, save, Py_MIN(nbytes, ERASED_SIZE));
+        memcpy(data, save, Py_MIN(nbytes, (size_t)ERASED_SIZE));
         if (nbytes > i) {
             memcpy(data + i, &save[ERASED_SIZE],
-                   Py_MIN(nbytes - i, ERASED_SIZE));
+                   Py_MIN(nbytes - i, (size_t)ERASED_SIZE));
         }
     }
 #endif