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KVM: s390: vsie: fix the length of APCB bitmap 

[ Upstream commit 246be7d272 ]

bit_and() uses the count of bits as the woking length.
Fix the previous implementation and effectively use
the right bitmap size.

Fixes: 19fd83a647 ("KVM: s390: vsie: allow CRYCB FORMAT-1")
Fixes: 56019f9aca ("KVM: s390: vsie: Allow CRYCB FORMAT-2")

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/kvm/20230511094719.9691-1-pmorel@linux.ibm.com/
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pierre Morel 2023-05-10 17:42:58 +02:00 committed by Greg Kroah-Hartman
parent e716693f02
commit c78ad1060c
1 changed files with 4 additions and 2 deletions
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6
arch/s390/kvm/vsie.c
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@ -169,7 +169,8 @@ static int setup_apcb00(struct kvm_vcpu *vcpu, unsigned long *apcb_s,
sizeof(struct kvm_s390_apcb0))) sizeof(struct kvm_s390_apcb0)))
return -EFAULT; return -EFAULT;
bitmap_and(apcb_s, apcb_s, apcb_h, sizeof(struct kvm_s390_apcb0)); bitmap_and(apcb_s, apcb_s, apcb_h,
BITS_PER_BYTE * sizeof(struct kvm_s390_apcb0));
return 0; return 0;
} }
@ -191,7 +192,8 @@ static int setup_apcb11(struct kvm_vcpu *vcpu, unsigned long *apcb_s,
sizeof(struct kvm_s390_apcb1))) sizeof(struct kvm_s390_apcb1)))
return -EFAULT; return -EFAULT;
bitmap_and(apcb_s, apcb_s, apcb_h, sizeof(struct kvm_s390_apcb1)); bitmap_and(apcb_s, apcb_s, apcb_h,
BITS_PER_BYTE * sizeof(struct kvm_s390_apcb1));
return 0; return 0;
} }