From: Md Haris Iqbal haris.iqbal@ionos.com

mainline inclusion from mainline-v6.12-rc1 commit d0e62bf7b575fbfe591f6f570e7595dd60a2f5eb category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRIA CVE: CVE-2024-50062

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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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 Conflicts: drivers/infiniband/ulp/rtrs/rtrs-srv.c [commit ae4c81644e91("RDMA/rtrs-srv: Rename rtrs_srv_sess to rtrs_srv_path") rename rtrs_srv_sess to rtrs_srv_path, which not merged lead to conflicts] Signed-off-by: Dong Chenchen dongchenchen2@huawei.com --- 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 b152a742cd3c..c325abf95637 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c @@ -909,12 +909,11 @@ static void rtrs_srv_info_req_done(struct ib_cq *cq, struct ib_wc *wc) if (unlikely(err)) goto close;

-out: rtrs_iu_free(iu, sess->s.dev->ib_dev, 1); return; close: + rtrs_iu_free(iu, sess->s.dev->ib_dev, 1); close_sess(sess); - goto out; }

static int post_recv_info_req(struct rtrs_srv_con *con) @@ -965,6 +964,16 @@ static int post_recv_sess(struct rtrs_srv_sess *sess) q_size = SERVICE_CON_QUEUE_DEPTH; else q_size = srv->queue_depth; + if (sess->state != RTRS_SRV_CONNECTING) { + rtrs_err(s, "Path state invalid. state %s\n", + rtrs_srv_state_str(sess->state)); + return -EIO; + } + + if (!sess->s.con[cid]) { + rtrs_err(s, "Conn not set for %d\n", cid); + return -EIO; + }

err = post_recv_io(to_srv_con(sess->s.con[cid]), q_size); if (unlikely(err)) {