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[Xen-devel] Bug in CS 20073
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Bug in CS 20073 |
| From: | Stephen Smalley <sds@xxxxxxxxxxxxx> |
| Date: | Fri, 21 Aug 2009 08:03:10 -0400 |
| Cc: | Xen <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx> |
| Delivery-date: | Fri, 21 Aug 2009 04:59:52 -0700 |
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| In-reply-to: | <C6B33243.1279E%keir.fraser@xxxxxxxxxxxxx> |
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| Organization: | National Security Agency |
| References: | <C6B33243.1279E%keir.fraser@xxxxxxxxxxxxx> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
On Thu, 2009-08-20 at 17:02 +0100, Keir Fraser wrote: > Looks like a lock normally taken with irqs disabled may be being taken with > irqs enabled. Which wouldn't be allowed but could be easy to fix. This appears to have been introduced by CS 20073, x86: Implement per-cpu vector for xen hypervisor. It introduces mixed usage of spin_lock() and spin_lock_irqsave() on the vector_lock, whereas previously it was always spin_lock_irqsave(). -- Stephen Smalley National Security Agency _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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