* [PATCH] target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue
@ 2024-07-24 1:58 Song Gao
2024-07-24 2:59 ` Richard Henderson
2024-07-26 10:12 ` Michael Tokarev
0 siblings, 2 replies; 4+ messages in thread
From: Song Gao @ 2024-07-24 1:58 UTC (permalink / raw)
To: qemu-devel, lixianglai, maobibo; +Cc: richard.henderson, peter.maydell, philmd
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>
---
target/loongarch/tcg/tlb_helper.c | 1 +
1 file changed, 1 insertion(+)
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)) {
--
2.34.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue
2024-07-24 1:58 [PATCH] target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue Song Gao
@ 2024-07-24 2:59 ` Richard Henderson
2024-07-26 10:12 ` Michael Tokarev
1 sibling, 0 replies; 4+ messages in thread
From: Richard Henderson @ 2024-07-24 2:59 UTC (permalink / raw)
To: Song Gao, qemu-devel, lixianglai, maobibo; +Cc: peter.maydell, philmd
On 7/24/24 11:58, Song Gao wrote:
> 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>
> ---
> target/loongarch/tcg/tlb_helper.c | 1 +
> 1 file changed, 1 insertion(+)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue
2024-07-24 1:58 [PATCH] target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue Song Gao
2024-07-24 2:59 ` Richard Henderson
@ 2024-07-26 10:12 ` Michael Tokarev
2024-07-26 15:11 ` Philippe Mathieu-Daudé
1 sibling, 1 reply; 4+ messages in thread
From: Michael Tokarev @ 2024-07-26 10:12 UTC (permalink / raw)
To: Song Gao, qemu-devel, lixianglai, maobibo
Cc: richard.henderson, peter.maydell, philmd, qemu-stable
24.07.2024 04:58, Song Gao wrote:
> 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>
> ---
> target/loongarch/tcg/tlb_helper.c | 1 +
> 1 file changed, 1 insertion(+)
>
> 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)) {
Is it qemu-stable material (for 9.0.x series)?
Thanks,
/mjt
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue
2024-07-26 10:12 ` Michael Tokarev
@ 2024-07-26 15:11 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 4+ messages in thread
From: Philippe Mathieu-Daudé @ 2024-07-26 15:11 UTC (permalink / raw)
To: Michael Tokarev, Song Gao, qemu-devel, lixianglai, maobibo
Cc: richard.henderson, peter.maydell, philmd, qemu-stable
On 26/7/24 12:12, Michael Tokarev wrote:
> 24.07.2024 04:58, Song Gao wrote:
>> 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>
>> ---
>> target/loongarch/tcg/tlb_helper.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> 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)) {
>
>
> Is it qemu-stable material (for 9.0.x series)?
If this applies cleanly, then yes.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2024-07-24 1:58 [PATCH] target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue Song Gao
2024-07-24 2:59 ` Richard Henderson
2024-07-26 10:12 ` Michael Tokarev
2024-07-26 15:11 ` Philippe Mathieu-Daudé
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