nvmet-rdma: fix response resource leak on queue teardown

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93151
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:18:10 UTC
Updated2026-09-17 17:18:10 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b 91cfa74f1f3772e8c3662c064a45d8633e00c78e git Not specified
CNA Linux Linux affected 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b 156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7 git Not specified
CNA Linux Linux affected 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b 9584b3c30e4ee8ca315bdc12249cc6c47cf1a482 git Not specified
CNA Linux Linux affected 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b 5cc3b21729d45b5af8f79891f9dedb7e6b6dbd08 git Not specified
CNA Linux Linux affected 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c git Not specified
CNA Linux Linux affected 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50 git Not specified
CNA Linux Linux affected 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b 0114dd303b373522dea06053aabae34bdd33a7c4 git Not specified
CNA Linux Linux affected 4.8 Not specified
CNA Linux Linux unaffected 4.8 semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/91cfa74f1f3772e8c3662c064a45d8633e00c78e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5cc3b21729d45b5af8f79891f9dedb7e6b6dbd08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9584b3c30e4ee8ca315bdc12249cc6c47cf1a482 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0114dd303b373522dea06053aabae34bdd33a7c4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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