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| author | Tao Cui <cuitao@kylinos.cn> | 2026-05-04 04:00:38 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2026-05-04 04:00:38 +0300 |
| commit | f26faae96c411a70641e4d21b759475caa6122d5 (patch) | |
| tree | f8485b420b8eede0ab5d9f2cae3cae1dadaad24e | |
| parent | b3e31a6650d4cab63f0814c37c0b360372c6ee9e (diff) | |
| download | linux-f26faae96c411a70641e4d21b759475caa6122d5.tar.xz | |
LoongArch: KVM: Fix missing EMULATE_FAIL in kvm_emu_mmio_read()
In the ldptr (0x24...0x27) opcode decoding path, the default case only
breaks out but without setting "ret" value to EMULATE_FAIL. This leaves
run->mmio.len uninitialized (stale from a previous MMIO operation) while
"ret" value remains EMULATE_DO_MMIO, causing the code to proceed with an
incorrect MMIO length.
Add "ret = EMULATE_FAIL" to match the other default branches in the same
function (e.g. the 0x28...0x2e and 0x38 cases).
Cc: stable@vger.kernel.org
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Tao Cui <cuitao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
| -rw-r--r-- | arch/loongarch/kvm/exit.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index da0ad89f2eb7..3b95cd0f989b 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -390,6 +390,7 @@ int kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst) run->mmio.len = 8; break; default: + ret = EMULATE_FAIL; break; } break; |