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iommu/vt-d: Check for allocation failure in aux_detach_device()
[ Upstream commit 1a590a1 ] In current kernels small allocations never fail, but checking for allocation failure is the correct thing to do. Fixes: 18abda7 ("iommu/vt-d: Fix general protection fault in aux_detach_device()") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/YJuobKuSn81dOPLd@mwanda Link: https://lore.kernel.org/r/20210519015027.108468-2-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
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