fix some oss-fuzz (#1206)

* fix oss-fuzz 18138. * fix oss-fuzz 20079. * fix oss-fuzz 20209. * fix oss-fuzz 20210. * fix oss-fuzz 20262. * rollback. * rollback. * fix oss-fuzz 20079. * fix oss-fuzz 20179. * fix oss-fuzz 20195. * fix oss-fuzz 20206. * fix oss-fuzz 20207. * fix oss-fuzz 20265.
2020-02-25 11:36:06 +08:00
parent 393a5641fd
commit c520307959
11 changed files with 41 additions and 19 deletions
--- a/qemu/cpu-exec.c
+++ b/qemu/cpu-exec.c
@ -395,6 +395,9 @@ static TranslationBlock *tb_find_slow(CPUArchState *env, target_ulong pc,
 not_found:
    /* if no translated code available, then translate it now */
    tb = tb_gen_code(cpu, pc, cs_base, (int)flags, 0);   // qq
+    if (tb == NULL) {
+        return NULL;
+    }

 found:
    /* Move the last found TB to the head of the list */