On 24/12/2024 15:05, Zhijian Li (Fujitsu) wrote: > The subject should be: > > RDMA/ulp -> RDMA/rtrs > > Additionally, the related reproducer is available at the following link Sorry for my fat finger, See the link as below: https://lore.kernel.org/linux-block/62c3b126-65b7-40ef-94e5-4758d5aa3cf3@xxxxxxxxxxx/T/#t > > Thanks > > On 23/12/2024 10:57, Li Zhijian wrote: >> A warning is triggered when repeatedly connecting and disconnecting the >> rnbd: >> list_add corruption. prev->next should be next (ffff88800b13e480), but was ffff88801ecd1338. (prev=ffff88801ecd1340). >> WARNING: CPU: 1 PID: 36562 at lib/list_debug.c:32 __list_add_valid_or_report+0x7f/0xa0 >> Workqueue: ib_cm cm_work_handler [ib_cm] >> RIP: 0010:__list_add_valid_or_report+0x7f/0xa0 >> ? __list_add_valid_or_report+0x7f/0xa0 >> ib_register_event_handler+0x65/0x93 [ib_core] >> rtrs_srv_ib_dev_init+0x29/0x30 [rtrs_server] >> rtrs_ib_dev_find_or_add+0x124/0x1d0 [rtrs_core] >> __alloc_path+0x46c/0x680 [rtrs_server] >> ? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server] >> ? rcu_is_watching+0xd/0x40 >> ? __mutex_lock+0x312/0xcf0 >> ? get_or_create_srv+0xad/0x310 [rtrs_server] >> ? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server] >> rtrs_rdma_connect+0x23c/0x2d0 [rtrs_server] >> ? __lock_release+0x1b1/0x2d0 >> cma_cm_event_handler+0x4a/0x1a0 [rdma_cm] >> cma_ib_req_handler+0x3a0/0x7e0 [rdma_cm] >> cm_process_work+0x28/0x1a0 [ib_cm] >> ? _raw_spin_unlock_irq+0x2f/0x50 >> cm_req_handler+0x618/0xa60 [ib_cm] >> cm_work_handler+0x71/0x520 [ib_cm] >> >> Fix it by invoking the `deinit()` to appropriately unregister the IB event >> handler. >> >> Fixes: 667db86bcbe8 ("RDMA/rtrs: Register ib event handler") >> Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx> >> --- >> drivers/infiniband/ulp/rtrs/rtrs.c | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c >> index 4e17d546d4cc..3b3efecd0817 100644 >> --- a/drivers/infiniband/ulp/rtrs/rtrs.c >> +++ b/drivers/infiniband/ulp/rtrs/rtrs.c >> @@ -580,6 +580,9 @@ static void dev_free(struct kref *ref) >> dev = container_of(ref, typeof(*dev), ref); >> pool = dev->pool; >> >> + if (pool->ops && pool->ops->deinit) >> + pool->ops->deinit(dev); >> + >> mutex_lock(&pool->mutex); >> list_del(&dev->entry); >> mutex_unlock(&pool->mutex);
