CVE-2025-21886 (GCVE-0-2025-21886)
Vulnerability from cvelistv5
Published
2025-03-27 14:57
Modified
2025-05-04 07:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix implicit ODP hang on parent deregistration Fix the destroy_unused_implicit_child_mr() to prevent hanging during parent deregistration as of below [1]. Upon entering destroy_unused_implicit_child_mr(), the reference count for the implicit MR parent is incremented using: refcount_inc_not_zero(). A corresponding decrement must be performed if free_implicit_child_mr_work() is not called. The code has been updated to properly manage the reference count that was incremented. [1] INFO: task python3:2157 blocked for more than 120 seconds. Not tainted 6.12.0-rc7+ #1633 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:python3 state:D stack:0 pid:2157 tgid:2157 ppid:1685 flags:0x00000000 Call Trace: <TASK> __schedule+0x420/0xd30 schedule+0x47/0x130 __mlx5_ib_dereg_mr+0x379/0x5d0 [mlx5_ib] ? __pfx_autoremove_wake_function+0x10/0x10 ib_dereg_mr_user+0x5f/0x120 [ib_core] ? lock_release+0xc6/0x280 destroy_hw_idr_uobject+0x1d/0x60 [ib_uverbs] uverbs_destroy_uobject+0x58/0x1d0 [ib_uverbs] uobj_destroy+0x3f/0x70 [ib_uverbs] ib_uverbs_cmd_verbs+0x3e4/0xbb0 [ib_uverbs] ? __pfx_uverbs_destroy_def_handler+0x10/0x10 [ib_uverbs] ? lock_acquire+0xc1/0x2f0 ? ib_uverbs_ioctl+0xcb/0x170 [ib_uverbs] ? ib_uverbs_ioctl+0x116/0x170 [ib_uverbs] ? lock_release+0xc6/0x280 ib_uverbs_ioctl+0xe7/0x170 [ib_uverbs] ? ib_uverbs_ioctl+0xcb/0x170 [ib_uverbs] __x64_sys_ioctl+0x1b0/0xa70 ? kmem_cache_free+0x221/0x400 do_syscall_64+0x6b/0x140 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f20f21f017b RSP: 002b:00007ffcfc4a77c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffcfc4a78d8 RCX: 00007f20f21f017b RDX: 00007ffcfc4a78c0 RSI: 00000000c0181b01 RDI: 0000000000000003 RBP: 00007ffcfc4a78a0 R08: 000056147d125190 R09: 00007f20f1f14c60 R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffcfc4a7890 R13: 000000000000001c R14: 000056147d100fc0 R15: 00007f20e365c9d0 </TASK>
References
Impacted products
Vendor Product Version
Linux Linux Version: 7cc8f681f6d4ae4478ae0f60485fc768f2b450da
Version: edfb65dbb9ffd3102f3ff4dd21316158e56f1976
Version: d3d930411ce390e532470194296658a960887773
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   Linux Linux Version: 6.12.13   ≤
Version: 6.13.2   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx5/odp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cb96ae783e7249e8e5a50c22952c0bb2983133df",
              "status": "affected",
              "version": "7cc8f681f6d4ae4478ae0f60485fc768f2b450da",
              "versionType": "git"
            },
            {
              "lessThan": "a095ede2daca49d15e74d66d014883f2fa8bb924",
              "status": "affected",
              "version": "edfb65dbb9ffd3102f3ff4dd21316158e56f1976",
              "versionType": "git"
            },
            {
              "lessThan": "3d8c6f26893d55fab218ad086719de1fc9bb86ba",
              "status": "affected",
              "version": "d3d930411ce390e532470194296658a960887773",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx5/odp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6.12.18",
              "status": "affected",
              "version": "6.12.13",
              "versionType": "semver"
            },
            {
              "lessThan": "6.13.6",
              "status": "affected",
              "version": "6.13.2",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.18",
                  "versionStartIncluding": "6.12.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.6",
                  "versionStartIncluding": "6.13.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix implicit ODP hang on parent deregistration\n\nFix the destroy_unused_implicit_child_mr() to prevent hanging during\nparent deregistration as of below [1].\n\nUpon entering destroy_unused_implicit_child_mr(), the reference count\nfor the implicit MR parent is incremented using:\nrefcount_inc_not_zero().\n\nA corresponding decrement must be performed if\nfree_implicit_child_mr_work() is not called.\n\nThe code has been updated to properly manage the reference count that\nwas incremented.\n\n[1]\nINFO: task python3:2157 blocked for more than 120 seconds.\nNot tainted 6.12.0-rc7+ #1633\n\"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:python3         state:D stack:0     pid:2157 tgid:2157  ppid:1685   flags:0x00000000\nCall Trace:\n\u003cTASK\u003e\n__schedule+0x420/0xd30\nschedule+0x47/0x130\n__mlx5_ib_dereg_mr+0x379/0x5d0 [mlx5_ib]\n? __pfx_autoremove_wake_function+0x10/0x10\nib_dereg_mr_user+0x5f/0x120 [ib_core]\n? lock_release+0xc6/0x280\ndestroy_hw_idr_uobject+0x1d/0x60 [ib_uverbs]\nuverbs_destroy_uobject+0x58/0x1d0 [ib_uverbs]\nuobj_destroy+0x3f/0x70 [ib_uverbs]\nib_uverbs_cmd_verbs+0x3e4/0xbb0 [ib_uverbs]\n? __pfx_uverbs_destroy_def_handler+0x10/0x10 [ib_uverbs]\n? lock_acquire+0xc1/0x2f0\n? ib_uverbs_ioctl+0xcb/0x170 [ib_uverbs]\n? ib_uverbs_ioctl+0x116/0x170 [ib_uverbs]\n? lock_release+0xc6/0x280\nib_uverbs_ioctl+0xe7/0x170 [ib_uverbs]\n? ib_uverbs_ioctl+0xcb/0x170 [ib_uverbs]\n __x64_sys_ioctl+0x1b0/0xa70\n? kmem_cache_free+0x221/0x400\ndo_syscall_64+0x6b/0x140\nentry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7f20f21f017b\nRSP: 002b:00007ffcfc4a77c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007ffcfc4a78d8 RCX: 00007f20f21f017b\nRDX: 00007ffcfc4a78c0 RSI: 00000000c0181b01 RDI: 0000000000000003\nRBP: 00007ffcfc4a78a0 R08: 000056147d125190 R09: 00007f20f1f14c60\nR10: 0000000000000001 R11: 0000000000000246 R12: 00007ffcfc4a7890\nR13: 000000000000001c R14: 000056147d100fc0 R15: 00007f20e365c9d0\n\u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:23:20.708Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cb96ae783e7249e8e5a50c22952c0bb2983133df"
        },
        {
          "url": "https://git.kernel.org/stable/c/a095ede2daca49d15e74d66d014883f2fa8bb924"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d8c6f26893d55fab218ad086719de1fc9bb86ba"
        }
      ],
      "title": "RDMA/mlx5: Fix implicit ODP hang on parent deregistration",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21886",
    "datePublished": "2025-03-27T14:57:13.923Z",
    "dateReserved": "2024-12-29T08:45:45.782Z",
    "dateUpdated": "2025-05-04T07:23:20.708Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21886\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-03-27T15:15:56.510\",\"lastModified\":\"2025-03-27T16:45:12.210\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/mlx5: Fix implicit ODP hang on parent deregistration\\n\\nFix the destroy_unused_implicit_child_mr() to prevent hanging during\\nparent deregistration as of below [1].\\n\\nUpon entering destroy_unused_implicit_child_mr(), the reference count\\nfor the implicit MR parent is incremented using:\\nrefcount_inc_not_zero().\\n\\nA corresponding decrement must be performed if\\nfree_implicit_child_mr_work() is not called.\\n\\nThe code has been updated to properly manage the reference count that\\nwas incremented.\\n\\n[1]\\nINFO: task python3:2157 blocked for more than 120 seconds.\\nNot tainted 6.12.0-rc7+ #1633\\n\\\"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\\\" disables this message.\\ntask:python3         state:D stack:0     pid:2157 tgid:2157  ppid:1685   flags:0x00000000\\nCall Trace:\\n\u003cTASK\u003e\\n__schedule+0x420/0xd30\\nschedule+0x47/0x130\\n__mlx5_ib_dereg_mr+0x379/0x5d0 [mlx5_ib]\\n? __pfx_autoremove_wake_function+0x10/0x10\\nib_dereg_mr_user+0x5f/0x120 [ib_core]\\n? lock_release+0xc6/0x280\\ndestroy_hw_idr_uobject+0x1d/0x60 [ib_uverbs]\\nuverbs_destroy_uobject+0x58/0x1d0 [ib_uverbs]\\nuobj_destroy+0x3f/0x70 [ib_uverbs]\\nib_uverbs_cmd_verbs+0x3e4/0xbb0 [ib_uverbs]\\n? __pfx_uverbs_destroy_def_handler+0x10/0x10 [ib_uverbs]\\n? lock_acquire+0xc1/0x2f0\\n? ib_uverbs_ioctl+0xcb/0x170 [ib_uverbs]\\n? ib_uverbs_ioctl+0x116/0x170 [ib_uverbs]\\n? lock_release+0xc6/0x280\\nib_uverbs_ioctl+0xe7/0x170 [ib_uverbs]\\n? ib_uverbs_ioctl+0xcb/0x170 [ib_uverbs]\\n __x64_sys_ioctl+0x1b0/0xa70\\n? kmem_cache_free+0x221/0x400\\ndo_syscall_64+0x6b/0x140\\nentry_SYSCALL_64_after_hwframe+0x76/0x7e\\nRIP: 0033:0x7f20f21f017b\\nRSP: 002b:00007ffcfc4a77c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\\nRAX: ffffffffffffffda RBX: 00007ffcfc4a78d8 RCX: 00007f20f21f017b\\nRDX: 00007ffcfc4a78c0 RSI: 00000000c0181b01 RDI: 0000000000000003\\nRBP: 00007ffcfc4a78a0 R08: 000056147d125190 R09: 00007f20f1f14c60\\nR10: 0000000000000001 R11: 0000000000000246 R12: 00007ffcfc4a7890\\nR13: 000000000000001c R14: 000056147d100fc0 R15: 00007f20e365c9d0\\n\u003c/TASK\u003e\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3d8c6f26893d55fab218ad086719de1fc9bb86ba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a095ede2daca49d15e74d66d014883f2fa8bb924\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cb96ae783e7249e8e5a50c22952c0bb2983133df\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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