Description
In the Linux kernel, the following vulnerability has been resolved: nvmet-rdma: fix response resource leak on queue teardown When an nvme target with rdma transport is removed while I/Os are in flight, a response can be posted but its send completion is never delivered before the connection is torn down. As a result nvmet_rdma_send_done() and nvmet_rdma_release_rsp() are never called for the response, and this leaks the allocated RDMA read/write context and request SGLs. These leaks are recreated by running blktests nvme/061 with the rdma transport and the siw driver. Kernel kmemleak feature reports them as follows: unreferenced object 0xffff88812bc490c0 (size 32): comm "kworker/2:1H", pid 409, jiffies 4307744490 backtrace (crc 89afd339): __kmalloc_noprof+0x5f9/0x890 sgl_alloc_order+0x7b/0x380 nvmet_req_alloc_sgls+0x290/0x4f0 [nvmet] nvmet_rdma_map_sgl_keyed+0x241/0x12e0 [nvmet_rdma] nvmet_rdma_handle_command+0x73e/0xb80 [nvmet_rdma] __ib_process_cq+0x149/0x4c0 [ib_core] ib_cq_poll_work+0x49/0x160 [ib_core] process_one_work+0x8b2/0x1640 worker_thread+0x5fd/0xfe0 kthread+0x367/0x460 ret_from_fork+0x655/0x9d0 ret_from_fork_asm+0x1a/0x30 unreferenced object 0xffff88814bd05e80 (size 64): comm "kworker/3:1H", pid 148, jiffies 4295195428 backtrace (crc e35510cb): __kmalloc_noprof+0x5f9/0x890 rdma_rw_ctx_init+0x333/0x1fa0 [ib_core] nvmet_rdma_map_sgl_keyed+0x5c8/0x12e0 [nvmet_rdma] nvmet_rdma_handle_command+0x73e/0xb80 [nvmet_rdma] __ib_process_cq+0x149/0x4c0 [ib_core] ib_cq_poll_work+0x49/0x160 [ib_core] process_one_work+0x8b2/0x1640 worker_thread+0x5fd/0xfe0 kthread+0x367/0x460 ret_from_fork+0x655/0x9d0 ret_from_fork_asm+0x1a/0x30 To avoid the memory leaks, reclaim the memory of the in-flight responses when the queue QP is torn down. Call nvmet_rdma_free_rsp_resources() that frees up the RDMA read/write context and the request SGLs of such responses.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8f000cac6e7a6edca7ab93bafc7ed28b27c1545b to < 91cfa74f1f3772e8c3662c064a45d8633e00c78eaffected8f000cac6e7a6edca7ab93bafc7ed28b27c1545b to < 156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7affected8f000cac6e7a6edca7ab93bafc7ed28b27c1545b to < 9584b3c30e4ee8ca315bdc12249cc6c47cf1a482affected8f000cac6e7a6edca7ab93bafc7ed28b27c1545b to < 5cc3b21729d45b5af8f79891f9dedb7e6b6dbd08affected8f000cac6e7a6edca7ab93bafc7ed28b27c1545b to < ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1caffected8f000cac6e7a6edca7ab93bafc7ed28b27c1545b to < d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50affected8f000cac6e7a6edca7ab93bafc7ed28b27c1545b to < 0114dd303b373522dea06053aabae34bdd33a7c4affected
Linux Linux
Default version status: affected
4.8affected0 to < 4.8unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/91cfa74f1f3772e8c3662c064a45d8633e00c78e ↗
- https://git.kernel.org/stable/c/156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7 ↗
- https://git.kernel.org/stable/c/9584b3c30e4ee8ca315bdc12249cc6c47cf1a482 ↗
- https://git.kernel.org/stable/c/5cc3b21729d45b5af8f79891f9dedb7e6b6dbd08 ↗
- https://git.kernel.org/stable/c/ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c ↗
- https://git.kernel.org/stable/c/d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50 ↗
- https://git.kernel.org/stable/c/0114dd303b373522dea06053aabae34bdd33a7c4 ↗