6.6-stable review patch. If anyone has any objections, please let me know.
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From: Md Haris Iqbal haris.iqbal@ionos.com
[ Upstream commit d0e62bf7b575fbfe591f6f570e7595dd60a2f5eb ]
For RTRS path establishment, RTRS client initiates and completes con_num of connections. After establishing all its connections, the information is exchanged between the client and server through the info_req message. During this exchange, it is essential that all connections have been established, and the state of the RTRS srv path is CONNECTED.
So add these sanity checks, to make sure we detect and abort process in error scenarios to avoid null pointer deref.
Signed-off-by: Md Haris Iqbal haris.iqbal@ionos.com Signed-off-by: Jack Wang jinpu.wang@ionos.com Signed-off-by: Grzegorz Prajsner grzegorz.prajsner@ionos.com Link: https://patch.msgid.link/20240821112217.41827-9-haris.iqbal@ionos.com Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/ulp/rtrs/rtrs-srv.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c index 94ac99a4f696e..758a3d9c2844d 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c @@ -931,12 +931,11 @@ static void rtrs_srv_info_req_done(struct ib_cq *cq, struct ib_wc *wc) if (err) goto close;
-out: rtrs_iu_free(iu, srv_path->s.dev->ib_dev, 1); return; close: + rtrs_iu_free(iu, srv_path->s.dev->ib_dev, 1); close_path(srv_path); - goto out; }
static int post_recv_info_req(struct rtrs_srv_con *con) @@ -987,6 +986,16 @@ static int post_recv_path(struct rtrs_srv_path *srv_path) q_size = SERVICE_CON_QUEUE_DEPTH; else q_size = srv->queue_depth; + if (srv_path->state != RTRS_SRV_CONNECTING) { + rtrs_err(s, "Path state invalid. state %s\n", + rtrs_srv_state_str(srv_path->state)); + return -EIO; + } + + if (!srv_path->s.con[cid]) { + rtrs_err(s, "Conn not set for %d\n", cid); + return -EIO; + }
err = post_recv_io(to_srv_con(srv_path->s.con[cid]), q_size); if (err) {