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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: 9c70db9a43 ("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>
This commit is contained in:
Song Gao 2024-07-24 09:58:53 +08:00
parent 6410f877f5
commit a18ffbcf8b
1 changed files with 1 additions and 0 deletions
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target/loongarch/tcg/tlb_helper.c
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@ -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)) {