| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cma: Ensure rdma_addr_cancel() happens before issuing more requests\n\nThe FSM can run in a circle allowing rdma_resolve_ip() to be called twice\non the same id_priv. While this cannot happen without going through the\nwork, it violates the invariant that the same address resolution\nbackground request cannot be active twice.\n\n CPU 1 CPU 2\n\nrdma_resolve_addr():\n RDMA_CM_IDLE -> RDMA_CM_ADDR_QUERY\n rdma_resolve_ip(addr_handler) #1\n\n\t\t\t process_one_req(): for #1\n addr_handler():\n RDMA_CM_ADDR_QUERY -> RDMA_CM_ADDR_BOUND\n mutex_unlock(&id_priv->handler_mutex);\n [.. handler still running ..]\n\nrdma_resolve_addr():\n RDMA_CM_ADDR_BOUND -> RDMA_CM_ADDR_QUERY\n rdma_resolve_ip(addr_handler)\n !! two requests are now on the req_list\n\nrdma_destroy_id():\n destroy_id_handler_unlock():\n _destroy_id():\n cma_cancel_operation():\n rdma_addr_cancel()\n\n // process_one_req() self removes it\n\t\t spin_lock_bh(&lock);\n cancel_delayed_work(&req->work);\n\t if (!list_empty(&req->list)) == true\n\n ! rdma_addr_cancel() returns after process_on_req #1 is done\n\n kfree(id_priv)\n\n\t\t\t process_one_req(): for #2\n addr_handler():\n\t mutex_lock(&id_priv->handler_mutex);\n !! Use after free on id_priv\n\nrdma_addr_cancel() expects there to be one req on the list and only\ncancels the first one. The self-removal behavior of the work only happens\nafter the handler has returned. This yields a situations where the\nreq_list can have two reqs for the same \"handle\" but rdma_addr_cancel()\nonly cancels the first one.\n\nThe second req remains active beyond rdma_destroy_id() and will\nuse-after-free id_priv once it inevitably triggers.\n\nFix this by remembering if the id_priv has called rdma_resolve_ip() and\nalways cancel before calling it again. This ensures the req_list never\ngets more than one item in it and doesn't cost anything in the normal flow\nthat never uses this strange error path." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/infiniband/core/cma.c", |
| "drivers/infiniband/core/cma_priv.h" |
| ], |
| "versions": [ |
| { |
| "version": "e51060f08a61965c4dd91516d82fe90617152590", |
| "lessThan": "9a085fa9b7d644a234465091e038c1911e1a4f2a", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "e51060f08a61965c4dd91516d82fe90617152590", |
| "lessThan": "03d884671572af8bcfbc9e63944c1021efce7589", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "e51060f08a61965c4dd91516d82fe90617152590", |
| "lessThan": "305d568b72f17f674155a2a8275f865f207b3808", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/infiniband/core/cma.c", |
| "drivers/infiniband/core/cma_priv.h" |
| ], |
| "versions": [ |
| { |
| "version": "2.6.18", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "2.6.18", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.188", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.14.10", |
| "lessThanOrEqual": "5.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.18", |
| "versionEndExcluding": "5.10.188" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.18", |
| "versionEndExcluding": "5.14.10" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.18", |
| "versionEndExcluding": "5.15" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/9a085fa9b7d644a234465091e038c1911e1a4f2a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/03d884671572af8bcfbc9e63944c1021efce7589" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/305d568b72f17f674155a2a8275f865f207b3808" |
| } |
| ], |
| "title": "RDMA/cma: Ensure rdma_addr_cancel() happens before issuing more requests", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47391", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
