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Add check when store disk cache

From: Arch Stack
Subject: Add check when store disk cache
Date: Fri, 18 Sep 2015 08:15:22 +0800

I found that the function grub_disk_cache_store didn't check for cache->lock before free cache->data, and didn't set cache->lock before memcpy something to cache->data. If multi thread handle with the same cache at the same time, it will cause a fault. I have created a patch for it.

Attachment: 0001-Add-check-when-store-disk-cache.patch
Description: Binary data

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