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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-02-09 09:14:22 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-02-09 09:14:22 -0800 |
| commit | 09a93c1df3eafa43bcdfd7bf837c574911f12f55 (patch) | |
| tree | 7842550a36d72050f566b7c9ed0472e44e27db5f /arch | |
| parent | e6251ab4551f51fa4cee03523e08051898c3ce82 (diff) | |
| parent | 2c212e1baedcd782b2535a3f86bc491977677c0e (diff) | |
| download | linux-09a93c1df3eafa43bcdfd7bf837c574911f12f55.tar.bz2 | |
Merge tag 'kvm-s390-kernel-access' from emailed bundle
Pull s390 kvm fix from Christian Borntraeger:
"Add missing check for the MEMOP ioctl
The SIDA MEMOPs must only be used for secure guests, otherwise
userspace can do unwanted memory accesses"
* tag 'kvm-s390-kernel-access' from emailed bundle:
KVM: s390: Return error on SIDA memop on normal guest
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 577f1ead6a51..2296b1ff1e02 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -4667,6 +4667,8 @@ static long kvm_s390_guest_sida_op(struct kvm_vcpu *vcpu, return -EINVAL; if (mop->size + mop->sida_offset > sida_size(vcpu->arch.sie_block)) return -E2BIG; + if (!kvm_s390_pv_cpu_is_protected(vcpu)) + return -EINVAL; switch (mop->op) { case KVM_S390_MEMOP_SIDA_READ: |