Commit a18ffbcf8b for qemu.org

commit a18ffbcf8b9fabfc6c850ebb1d3e40a21b885c67
Author: Song Gao <gaosong@loongson.cn>
Date:   Wed Jul 24 09:58:53 2024 +0800

    target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue

    When the lddir level is 4 and the base is a HugePage, we may try to put value 4
    into a field in the TLBENTRY that is only 2 bits wide.

    Fixes: Coverity CID 1547717
    Fixes: 9c70db9a43388 ("target/loongarch: Fix tlb huge page loading issue")
    Signed-off-by: Song Gao <gaosong@loongson.cn>
    Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
    Message-Id: <20240724015853.1317396-1-gaosong@loongson.cn>

diff --git a/target/loongarch/tcg/tlb_helper.c b/target/loongarch/tcg/tlb_helper.c
index d6331f9b0b..97f38fc391 100644
--- a/target/loongarch/tcg/tlb_helper.c
+++ b/target/loongarch/tcg/tlb_helper.c
@@ -525,6 +525,7 @@ target_ulong helper_lddir(CPULoongArchState *env, target_ulong base,
         if (unlikely(level == 4)) {
             qemu_log_mask(LOG_GUEST_ERROR,
                           "Attempted use of level 4 huge page\n");
+            return base;
         }

         if (FIELD_EX64(base, TLBENTRY, LEVEL)) {