On 2015/6/16 15:31, tip-bot for Jiang Liu wrote: > Commit-ID: 458526ec81d755dfaa17f3d863302afe6fbefca0 > Gitweb: http://git.kernel.org/tip/458526ec81d755dfaa17f3d863302afe6fbefca0 > Author: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> > AuthorDate: Mon, 1 Jun 2015 16:05:11 +0800 > Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > CommitDate: Tue, 16 Jun 2015 09:23:28 +0200 > > genirq: Prevent crash in irq_move_irq() > > The functions irq_move_irq() and irq_move_masked_irq() expect that the > caller passes the top-level irq_data to them when hierarchical > irqdomains are enabled. But that's not true when called from > apic_ack_edge(), which results in a null pointer dereference by > idata->chip->irq_mask(idata). > > Instead of fixing callers to passing top-level irq_data, we rather > change irq_move_irq()/irq_move_masked_irq() to accept any irq_data. > > Fixes: 52f518a3a7c 'x86/MSI: Use hierarchical irqdomains to manage MSI interrupts' Hi Thomas, This patch has dependency on patch "[Patch v3 01/36] genirq: Enhance irq_data_to_desc() to support hierarchy irqdomain" in the same patch set, otherwise irq_data_to_desc(idata) may return invalid irq_desc and may cause memory crash. Thanks! Gerry -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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