From 0624a8eb82efd58e457093e8fd4514abd3b37cc0 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Wed, 24 Aug 2016 20:10:09 +0200 Subject: [PATCH] KVM: s390: Use memdup_user() rather than duplicating code * Reuse existing functionality from memdup_user() instead of keeping duplicate source code. This issue was detected by using the Coccinelle software. * Return directly if this copy operation failed. Reviewed-by: David Hildenbrand Acked-by: Cornelia Huck Signed-off-by: Markus Elfring Message-Id: Signed-off-by: Christian Borntraeger --- arch/s390/kvm/guestdbg.c | 18 ++++-------------- 1 file changed, 4 insertions(+), 14 deletions(-) diff --git a/arch/s390/kvm/guestdbg.c b/arch/s390/kvm/guestdbg.c index 70b71ac1660e..d7c6a7f53ced 100644 --- a/arch/s390/kvm/guestdbg.c +++ b/arch/s390/kvm/guestdbg.c @@ -216,20 +216,10 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, else if (dbg->arch.nr_hw_bp > MAX_BP_COUNT) return -EINVAL; - bp_data = kmalloc_array(dbg->arch.nr_hw_bp, - sizeof(*bp_data), - GFP_KERNEL); - if (!bp_data) { - ret = -ENOMEM; - goto error; - } - - if (copy_from_user(bp_data, - dbg->arch.hw_bp, - sizeof(*bp_data) * dbg->arch.nr_hw_bp)) { - ret = -EFAULT; - goto error; - } + bp_data = memdup_user(dbg->arch.hw_bp, + sizeof(*bp_data) * dbg->arch.nr_hw_bp); + if (IS_ERR(bp_data)) + return PTR_ERR(bp_data); for (i = 0; i < dbg->arch.nr_hw_bp; i++) { switch (bp_data[i].type) { -- 2.39.5