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Re: [patch V2 01/46] iommu/amd: Prevent NULL pointer dereference
- To: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
- From: Joerg Roedel <joro@xxxxxxxxxx>
- Date: Thu, 27 Aug 2020 16:57:36 +0200
- Cc: LKML <linux-kernel@xxxxxxxxxxxxxxx>, x86@xxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>, Jon Derrick <jonathan.derrick@xxxxxxxxx>, Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>, Wei Liu <wei.liu@xxxxxxxxxx>, "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>, Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>, Steve Wahl <steve.wahl@xxxxxxx>, Dimitri Sivanich <sivanich@xxxxxxx>, Russ Anderson <rja@xxxxxxx>, linux-pci@xxxxxxxxxxxxxxx, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>, Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Juergen Gross <jgross@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Marc Zyngier <maz@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, "Rafael J. Wysocki" <rafael@xxxxxxxxxx>, Megha Dey <megha.dey@xxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Jacob Pan <jacob.jun.pan@xxxxxxxxx>, Baolu Lu <baolu.lu@xxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>
- Delivery-date: Thu, 27 Aug 2020 14:57:42 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed, Aug 26, 2020 at 01:16:29PM +0200, Thomas Gleixner wrote:
> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
>
> Dereferencing irq_data before checking it for NULL is suboptimal.
>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Joerg Roedel <jroedel@xxxxxxx>
Reviewed-by: Joerg Roedel <jroedel@xxxxxxx>
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