diff options
| author | Ming Lei <ming.lei@redhat.com> | 2022-03-08 15:32:18 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-03-08 17:57:19 -0700 |
| commit | 4f481208749a22d3570073e629dbc27d7d27c8da (patch) | |
| tree | 8df524f2cca05a364031383731151d6b9b8775cc /block/blk-mq-tag.c | |
| parent | de0328d3a253a339be14a80fe2a0256ec26867da (diff) | |
| download | linux-4f481208749a22d3570073e629dbc27d7d27c8da.tar.bz2 | |
blk-mq: prepare for implementing hctx table via xarray
It is inevitable to cause use-after-free on q->queue_hw_ctx between
queue_for_each_hw_ctx() and blk_mq_update_nr_hw_queues(). And converting
to xarray can fix the uaf, meantime code gets cleaner.
Prepare for converting q->queue_hctx_ctx into xarray, one thing is that
xa_for_each() can only accept 'unsigned long' as index, so changes type
of hctx index of queue_for_each_hw_ctx() into 'unsigned long'.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220308073219.91173-6-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-tag.c')
| -rw-r--r-- | block/blk-mq-tag.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 0fd409b8e86e..1850a4225e12 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -515,7 +515,7 @@ void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_tag_iter_fn *fn, bt_for_each(NULL, q, btags, fn, priv, false); } else { struct blk_mq_hw_ctx *hctx; - int i; + unsigned long i; queue_for_each_hw_ctx(q, hctx, i) { struct blk_mq_tags *tags = hctx->tags; |