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authorMatias Bjorling <m@bjorling.me>2013-12-10 16:50:38 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2013-12-15 12:17:16 -0800
commit57053d8c5c59562cac156513740c10b502a40968 (patch)
tree0e71310912a1004760561540bc7e665957468ee5 /include
parente4158f1b1090d362a7c998bd654cc3fe8f5c863c (diff)
downloadlinux-linaro-stable-57053d8c5c59562cac156513740c10b502a40968.tar.gz
null_blk: mem garbage on NUMA systems during init
For NUMA systems, initializing the blk-mq layer and using per node hctx. We initialize submit queues to 1, while blk-mq nr_hw_queues is initialized to the number of NUMA nodes. This makes the null_init_hctx function overwrite memory outside of what it allocated. In my case it lead to writing garbage into struct request_queue's mq_map. Signed-off-by: Matias Bjorling <m@bjorling.me> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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