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

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[ Upstream commit 246be7d2720ea9a795b576067ecc5e5c7a1e7848 ]

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 baec796723
commit d9db18addf
1 changed files with 4 additions and 2 deletions
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6
arch/s390/kvm/vsie.c
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@ -168,7 +168,8 @@ static int setup_apcb00(struct kvm_vcpu *vcpu, unsigned long *apcb_s,
sizeof(struct kvm_s390_apcb0)))
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;
}
@ -190,7 +191,8 @@ static int setup_apcb11(struct kvm_vcpu *vcpu, unsigned long *apcb_s,
sizeof(struct kvm_s390_apcb1)))
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;
}