Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs-clt: Fix CQ pool leak when connect is interrupted The client borrows shared CQ credits in the ADDR_RESOLVED handler via ib_cq_pool_get(), before the peer is connected. create_cm() can return -ERESTARTSYS from wait_event_interruptible_timeout() without destroying the CM ID. The init_conns() and stop-and-destroy paths then call destroy_con_cq_qp() while cq is still NULL (no PUT) and only afterwards rdma_destroy_id(). CMA serializes the handler against rdma_destroy_id() with handler_mutex, but that does not order the GET against destroy_con_cq_qp(). If ADDR_RESOLVED has already passed the DESTROYING check, it can take con_mutex, GET credits, and then lose the con to kfree. Device unregister later hits WARN_ON(cq->cqe_used) in ib_cq_pool_cleanup(). Set a per-connection flag under con_mutex before CQ/QP teardown so a racing ADDR_RESOLVED cannot borrow credits after teardown has begun.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3b89e92c2a95a39c38a3808f4528e502a39bd94d before a82cca40139d9fcae8208901856bd5bb4051f097; affected 3b89e92c2a95a39c38a3808f4528e502a39bd94d before 74c4ed55e61f1b65ddbebc5b635d136461a1c3da; affected 3b89e92c2a95a39c38a3808f4528e502a39bd94d before 6f8020fe7465f49e234a576c04e415e9d08c7878; affected 3b89e92c2a95a39c38a3808f4528e502a39bd94d before 31024e158b45358370a0a14ed96589e6aa62d6cb; affected 3b89e92c2a95a39c38a3808f4528e502a39bd94d before 8f253d5893f991742464b9e7203c43fc08d0aa11; affected 3b89e92c2a95a39c38a3808f4528e502a39bd94d before bf88ac4867050112a6c819c8d1a7209bf48ef427; affected 3b89e92c2a95a39c38a3808f4528e502a39bd94d before 2ae16aaa78b5edc6e6d0904c84fd9cdfb762bcda |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a82cca40139d9fcae8208901856bd5bb4051f097
- https://git.kernel.org/stable/c/74c4ed55e61f1b65ddbebc5b635d136461a1c3da
- https://git.kernel.org/stable/c/6f8020fe7465f49e234a576c04e415e9d08c7878
- https://git.kernel.org/stable/c/31024e158b45358370a0a14ed96589e6aa62d6cb
- https://git.kernel.org/stable/c/8f253d5893f991742464b9e7203c43fc08d0aa11
- https://git.kernel.org/stable/c/bf88ac4867050112a6c819c8d1a7209bf48ef427
- https://git.kernel.org/stable/c/2ae16aaa78b5edc6e6d0904c84fd9cdfb762bcda