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Date: Wed, 26 Nov 2014 09:00:19 -0500 From: Sasha Levin <sasha.levin@...cle.com> To: mingo@...nel.org, akpm@...ux-foundation.org, torvalds@...ux-foundation.org Cc: linux-kernel@...r.kernel.org, Sasha Levin <sasha.levin@...cle.com> Subject: [RFC 2/2] kvm: eventfd: detect integer overflow using check_*_overflow Detect integer overflows using safe operations rather than relying on undefined behaviour. Signed-off-by: Sasha Levin <sasha.levin@...cle.com> --- virt/kvm/eventfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 148b239..2eb044f 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -790,7 +790,7 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) } /* check for range overflow */ - if (args->addr + args->len < args->addr) + if (check_add_overflow(args->len, args->addr)) return -EINVAL; /* check for extra flags that we don't understand */ -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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