Commit bbfc3c5d authored by Tahsin Erdogan's avatar Tahsin Erdogan Committed by Jens Axboe
Browse files

block: queue lock must be acquired when iterating over rls

blk_set_queue_dying() does not acquire queue lock before it calls
blk_queue_for_each_rl(). This allows a racing blkg_destroy() to
remove blkg->q_node from the linked list and have
blk_queue_for_each_rl() loop infitely over the removed blkg->q_node
list node.
Signed-off-by: default avatarTahsin Erdogan <>
Signed-off-by: default avatarJens Axboe <>
parent 5fad1b64
......@@ -527,12 +527,14 @@ void blk_set_queue_dying(struct request_queue *q)
else {
struct request_list *rl;
blk_queue_for_each_rl(rl, q) {
if (rl->rq_pool) {
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