From daaca3522a8e67c46e39ef09c1d542e866f85f3b Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Mon, 14 Mar 2022 12:30:18 +0800 Subject: block: release rq qos structures for queue without disk blkcg_init_queue() may add rq qos structures to request queue, previously blk_cleanup_queue() calls rq_qos_exit() to release them, but commit 8e141f9eb803 ("block: drain file system I/O on del_gendisk") moves rq_qos_exit() into del_gendisk(), so memory leak is caused because queues may not have disk, such as un-present scsi luns, nvme admin queue, ... Fixes the issue by adding rq_qos_exit() to blk_cleanup_queue() back. BTW, v5.18 won't need this patch any more since we move blkcg_init_queue()/blkcg_exit_queue() into disk allocation/release handler, and patches have been in for-5.18/block. Cc: Christoph Hellwig Cc: stable@vger.kernel.org Fixes: 8e141f9eb803 ("block: drain file system I/O on del_gendisk") Reported-by: syzbot+b42749a851a47a0f581b@syzkaller.appspotmail.com Signed-off-by: Ming Lei Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220314043018.177141-1-ming.lei@redhat.com Signed-off-by: Jens Axboe --- block/blk-core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/blk-core.c b/block/blk-core.c index 1039515c99d6..779b4a1f66ac 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -50,6 +50,7 @@ #include "blk-mq-sched.h" #include "blk-pm.h" #include "blk-throttle.h" +#include "blk-rq-qos.h" struct dentry *blk_debugfs_root; @@ -314,6 +315,9 @@ void blk_cleanup_queue(struct request_queue *q) */ blk_freeze_queue(q); + /* cleanup rq qos structures for queue without disk */ + rq_qos_exit(q); + blk_queue_flag_set(QUEUE_FLAG_DEAD, q); blk_sync_queue(q); -- cgit From 0c48645a7f3988a624767d025fa3275ae24b6ca1 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Tue, 15 Mar 2022 10:14:36 +0100 Subject: nvmet: revert "nvmet: make discovery NQN configurable" Revert commit 626851e9225d ("nvmet: make discovery NQN configurable"); the interface was deemed incorrect and will be replaced with a different one. Fixes: 626851e9225d ("nvmet: make discovery NQN configurable") Signed-off-by: Hannes Reinecke Signed-off-by: Christoph Hellwig --- drivers/nvme/target/configfs.c | 39 --------------------------------------- drivers/nvme/target/core.c | 3 +-- 2 files changed, 1 insertion(+), 41 deletions(-) diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c index 091a0ca16361..496d775c6770 100644 --- a/drivers/nvme/target/configfs.c +++ b/drivers/nvme/target/configfs.c @@ -1233,44 +1233,6 @@ static ssize_t nvmet_subsys_attr_model_store(struct config_item *item, } CONFIGFS_ATTR(nvmet_subsys_, attr_model); -static ssize_t nvmet_subsys_attr_discovery_nqn_show(struct config_item *item, - char *page) -{ - return snprintf(page, PAGE_SIZE, "%s\n", - nvmet_disc_subsys->subsysnqn); -} - -static ssize_t nvmet_subsys_attr_discovery_nqn_store(struct config_item *item, - const char *page, size_t count) -{ - struct nvmet_subsys *subsys = to_subsys(item); - char *subsysnqn; - int len; - - len = strcspn(page, "\n"); - if (!len) - return -EINVAL; - - subsysnqn = kmemdup_nul(page, len, GFP_KERNEL); - if (!subsysnqn) - return -ENOMEM; - - /* - * The discovery NQN must be different from subsystem NQN. - */ - if (!strcmp(subsysnqn, subsys->subsysnqn)) { - kfree(subsysnqn); - return -EBUSY; - } - down_write(&nvmet_config_sem); - kfree(nvmet_disc_subsys->subsysnqn); - nvmet_disc_subsys->subsysnqn = subsysnqn; - up_write(&nvmet_config_sem); - - return count; -} -CONFIGFS_ATTR(nvmet_subsys_, attr_discovery_nqn); - #ifdef CONFIG_BLK_DEV_INTEGRITY static ssize_t nvmet_subsys_attr_pi_enable_show(struct config_item *item, char *page) @@ -1300,7 +1262,6 @@ static struct configfs_attribute *nvmet_subsys_attrs[] = { &nvmet_subsys_attr_attr_cntlid_min, &nvmet_subsys_attr_attr_cntlid_max, &nvmet_subsys_attr_attr_model, - &nvmet_subsys_attr_attr_discovery_nqn, #ifdef CONFIG_BLK_DEV_INTEGRITY &nvmet_subsys_attr_attr_pi_enable, #endif diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 5119c687de68..626caf6f1e4b 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -1493,8 +1493,7 @@ static struct nvmet_subsys *nvmet_find_get_subsys(struct nvmet_port *port, if (!port) return NULL; - if (!strcmp(NVME_DISC_SUBSYS_NAME, subsysnqn) || - !strcmp(nvmet_disc_subsys->subsysnqn, subsysnqn)) { + if (!strcmp(NVME_DISC_SUBSYS_NAME, subsysnqn)) { if (!kref_get_unless_zero(&nvmet_disc_subsys->ref)) return NULL; return nvmet_disc_subsys; -- cgit