| Message ID | 20240724015853.1317396-1-gaosong@loongson.cn |
|---|---|
| State | New |
| Headers | show |
| Series | target/loongarch: Fix helper_lddir() a CID INTEGER_OVERFLOW issue | expand |
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~
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
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.
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)) {
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(+)