This is a note to let you know that I've just added the patch titled
KVM: s390: vsie: fix the length of APCB bitmap
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-s390-vsie-fix-the-length-of-apcb-bitmap.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c4264d6cc6f7858a46495b03a0db4ec4a29c4037
Author: Pierre Morel <pmorel@xxxxxxxxxxxxx>
Date: Wed May 10 17:42:58 2023 +0200
KVM: s390: vsie: fix the length of APCB bitmap
[ 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: 19fd83a64718 ("KVM: s390: vsie: allow CRYCB FORMAT-1")
Fixes: 56019f9aca22 ("KVM: s390: vsie: Allow CRYCB FORMAT-2")
Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
Reviewed-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/kvm/20230511094719.9691-1-pmorel@xxxxxxxxxxxxx/
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 2021946176de8..596b2a2cd837d 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -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;
}
