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| author | Huacai Chen <chenhuacai@loongson.cn> | 2026-03-26 09:29:09 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2026-03-26 09:29:09 +0300 |
| commit | 2db06c15d8c7a0ccb6108524e16cd9163753f354 (patch) | |
| tree | c120d3e61f115b10a642626f0ce91d138f104b89 /arch | |
| parent | e4878c37f6679fdea91b27a0f4e60a871f0b7bad (diff) | |
| download | linux-2db06c15d8c7a0ccb6108524e16cd9163753f354.tar.xz | |
LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust
kvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so
cpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this
case so as to make it more robust.
This fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[].
Cc: <stable@vger.kernel.org>
Fixes: 73516e9da512adc ("LoongArch: KVM: Add vcpu mapping from physical cpuid")
Reported-by: Aurelien Jarno <aurel32@debian.org>
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1131431
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/loongarch/kvm/vcpu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 8ffd50a470e6..831f381a8fd1 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -588,6 +588,9 @@ struct kvm_vcpu *kvm_get_vcpu_by_cpuid(struct kvm *kvm, int cpuid) { struct kvm_phyid_map *map; + if (cpuid < 0) + return NULL; + if (cpuid >= KVM_MAX_PHYID) return NULL; |