Gioh Kim b64415c6b3 RDMA/rtrs-clt: destroy sysfs after removing session from active list ... [ Upstream commit 7f4a8592ff ] A session can be removed dynamically by sysfs interface "remove_path" that eventually calls rtrs_clt_remove_path_from_sysfs function. The current rtrs_clt_remove_path_from_sysfs first removes the sysfs interfaces and frees sess->stats object. Second it removes the session from the active list. Therefore some functions could access non-connected session and access the freed sess->stats object even-if they check the session status before accessing the session. For instance rtrs_clt_request and get_next_path_min_inflight check the session status and try to send IO to the session. The session status could be changed when they are trying to send IO but they could not catch the change and update the statistics information in sess->stats object, and generate use-after-free problem. (see: "RDMA/rtrs-clt: Check state of the rtrs_clt_sess before reading its stats") This patch changes the rtrs_clt_remove_path_from_sysfs to remove the session from the active session list and then destroy the sysfs interfaces. Each function still should check the session status because closing or error recovery paths can change the status. Fixes: 6a98d71dae ("RDMA/rtrs: client: main functionality") Link: https://lore.kernel.org/r/20210412084002.33582-1-gi-oh.kim@ionos.com Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com> Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-05-14 09:50:36 +02:00
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ipoib	RDMA 5.10 pull request	2020-10-17 11:18:18 -07:00
iser	RDMA: Add rdma_connect_locked()	2020-10-28 09:14:49 -03:00
isert	IB/isert: Fix a use after free in isert_connect_request	2021-05-14 09:50:31 +02:00
opa_vnic	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
rtrs	RDMA/rtrs-clt: destroy sysfs after removing session from active list	2021-05-14 09:50:36 +02:00
srp	RDMA/srp: Fix support for unpopulated and unbalanced NUMA nodes	2021-03-20 10:43:43 +01:00
srpt	RDMA/srpt: Fix error return code in srpt_cm_req_recv()	2021-05-14 09:50:36 +02:00
Makefile	RDMA/rtrs: include client and server modules into kernel compilation	2020-05-17 18:57:15 -03:00