| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1376647687-20550-2-git-send-email-weiyang@linux.vnet.ibm.com> Date: Fri, 16 Aug 2013 18:08:06 +0800 From: Wei Yang <weiyang@...ux.vnet.ibm.com> To: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org Cc: aik@...abs.ru, benh@....ibm.com, paulus@....ibm.com, Wei Yang <weiyang@...ux.vnet.ibm.com> Subject: [PATCH 1/2] iommu: Don't remove device when no iommu_group associated In some cases, one device may not associated with any iommu_group. For example, not enough DMA address space. For those devices, kernel will crash when try to remove it from an iommu_group. This patch do the check before remove it. Signed-off-by: Wei Yang <weiyang@...ux.vnet.ibm.com> --- drivers/iommu/iommu.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index fbe9ca7..fe41946 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -379,6 +379,9 @@ void iommu_group_remove_device(struct device *dev) struct iommu_group *group = dev->iommu_group; struct iommu_device *tmp_device, *device = NULL; + if (!group) + return; + /* Pre-notify listeners that a device is being removed. */ blocking_notifier_call_chain(&group->notifier, IOMMU_GROUP_NOTIFY_DEL_DEVICE, dev); -- 1.7.5.4 -- 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/
Powered by blists - more mailing lists