CVE-2025-22089 (GCVE-0-2025-22089)
Vulnerability from cvelistv5
Published
2025-04-16 14:12
Modified
2025-05-26 05:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Don't expose hw_counters outside of init net namespace Commit 467f432a521a ("RDMA/core: Split port and device counter sysfs attributes") accidentally almost exposed hw counters to non-init net namespaces. It didn't expose them fully, as an attempt to read any of those counters leads to a crash like this one: [42021.807566] BUG: kernel NULL pointer dereference, address: 0000000000000028 [42021.814463] #PF: supervisor read access in kernel mode [42021.819549] #PF: error_code(0x0000) - not-present page [42021.824636] PGD 0 P4D 0 [42021.827145] Oops: 0000 [#1] SMP PTI [42021.830598] CPU: 82 PID: 2843922 Comm: switchto-defaul Kdump: loaded Tainted: G S W I XXX [42021.841697] Hardware name: XXX [42021.849619] RIP: 0010:hw_stat_device_show+0x1e/0x40 [ib_core] [42021.855362] Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 49 89 d0 4c 8b 5e 20 48 8b 8f b8 04 00 00 48 81 c7 f0 fa ff ff <48> 8b 41 28 48 29 ce 48 83 c6 d0 48 c1 ee 04 69 d6 ab aa aa aa 48 [42021.873931] RSP: 0018:ffff97fe90f03da0 EFLAGS: 00010287 [42021.879108] RAX: ffff9406988a8c60 RBX: ffff940e1072d438 RCX: 0000000000000000 [42021.886169] RDX: ffff94085f1aa000 RSI: ffff93c6cbbdbcb0 RDI: ffff940c7517aef0 [42021.893230] RBP: ffff97fe90f03e70 R08: ffff94085f1aa000 R09: 0000000000000000 [42021.900294] R10: ffff94085f1aa000 R11: ffffffffc0775680 R12: ffffffff87ca2530 [42021.907355] R13: ffff940651602840 R14: ffff93c6cbbdbcb0 R15: ffff94085f1aa000 [42021.914418] FS: 00007fda1a3b9700(0000) GS:ffff94453fb80000(0000) knlGS:0000000000000000 [42021.922423] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [42021.928130] CR2: 0000000000000028 CR3: 00000042dcfb8003 CR4: 00000000003726f0 [42021.935194] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [42021.942257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [42021.949324] Call Trace: [42021.951756] <TASK> [42021.953842] [<ffffffff86c58674>] ? show_regs+0x64/0x70 [42021.959030] [<ffffffff86c58468>] ? __die+0x78/0xc0 [42021.963874] [<ffffffff86c9ef75>] ? page_fault_oops+0x2b5/0x3b0 [42021.969749] [<ffffffff87674b92>] ? exc_page_fault+0x1a2/0x3c0 [42021.975549] [<ffffffff87801326>] ? asm_exc_page_fault+0x26/0x30 [42021.981517] [<ffffffffc0775680>] ? __pfx_show_hw_stats+0x10/0x10 [ib_core] [42021.988482] [<ffffffffc077564e>] ? hw_stat_device_show+0x1e/0x40 [ib_core] [42021.995438] [<ffffffff86ac7f8e>] dev_attr_show+0x1e/0x50 [42022.000803] [<ffffffff86a3eeb1>] sysfs_kf_seq_show+0x81/0xe0 [42022.006508] [<ffffffff86a11134>] seq_read_iter+0xf4/0x410 [42022.011954] [<ffffffff869f4b2e>] vfs_read+0x16e/0x2f0 [42022.017058] [<ffffffff869f50ee>] ksys_read+0x6e/0xe0 [42022.022073] [<ffffffff8766f1ca>] do_syscall_64+0x6a/0xa0 [42022.027441] [<ffffffff8780013b>] entry_SYSCALL_64_after_hwframe+0x78/0xe2 The problem can be reproduced using the following steps: ip netns add foo ip netns exec foo bash cat /sys/class/infiniband/mlx4_0/hw_counters/* The panic occurs because of casting the device pointer into an ib_device pointer using container_of() in hw_stat_device_show() is wrong and leads to a memory corruption. However the real problem is that hw counters should never been exposed outside of the non-init net namespace. Fix this by saving the index of the corresponding attribute group (it might be 1 or 2 depending on the presence of driver-specific attributes) and zeroing the pointer to hw_counters group for compat devices during the initialization. With this fix applied hw_counters are not available in a non-init net namespace: find /sys/class/infiniband/mlx4_0/ -name hw_counters /sys/class/infiniband/mlx4_0/ports/1/hw_counters /sys/class/infiniband/mlx4_0/ports/2/hw_counters /sys/class/infiniband/mlx4_0/hw_counters ip netns add foo ip netns exec foo bash find /sys/class/infiniband/mlx4_0/ -name hw_counters
References
Impacted products
Vendor Product Version
Linux Linux Version: 467f432a521a284c418e3d521ee51840a5e23424
Version: 467f432a521a284c418e3d521ee51840a5e23424
Version: 467f432a521a284c418e3d521ee51840a5e23424
Version: 467f432a521a284c418e3d521ee51840a5e23424
Version: 467f432a521a284c418e3d521ee51840a5e23424
Version: 467f432a521a284c418e3d521ee51840a5e23424
Version: 467f432a521a284c418e3d521ee51840a5e23424
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/device.c",
            "drivers/infiniband/core/sysfs.c",
            "include/rdma/ib_verbs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/device.c",
            "drivers/infiniband/core/sysfs.c",
            "include/rdma/ib_verbs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.180",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.134",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.87",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.180",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.134",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.87",
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                  "versionEndExcluding": "6.12.23",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.11",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Don\u0027t expose hw_counters outside of init net namespace\n\nCommit 467f432a521a (\"RDMA/core: Split port and device counter sysfs\nattributes\") accidentally almost exposed hw counters to non-init net\nnamespaces. It didn\u0027t expose them fully, as an attempt to read any of\nthose counters leads to a crash like this one:\n\n[42021.807566] BUG: kernel NULL pointer dereference, address: 0000000000000028\n[42021.814463] #PF: supervisor read access in kernel mode\n[42021.819549] #PF: error_code(0x0000) - not-present page\n[42021.824636] PGD 0 P4D 0\n[42021.827145] Oops: 0000 [#1] SMP PTI\n[42021.830598] CPU: 82 PID: 2843922 Comm: switchto-defaul Kdump: loaded Tainted: G S      W I        XXX\n[42021.841697] Hardware name: XXX\n[42021.849619] RIP: 0010:hw_stat_device_show+0x1e/0x40 [ib_core]\n[42021.855362] Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 49 89 d0 4c 8b 5e 20 48 8b 8f b8 04 00 00 48 81 c7 f0 fa ff ff \u003c48\u003e 8b 41 28 48 29 ce 48 83 c6 d0 48 c1 ee 04 69 d6 ab aa aa aa 48\n[42021.873931] RSP: 0018:ffff97fe90f03da0 EFLAGS: 00010287\n[42021.879108] RAX: ffff9406988a8c60 RBX: ffff940e1072d438 RCX: 0000000000000000\n[42021.886169] RDX: ffff94085f1aa000 RSI: ffff93c6cbbdbcb0 RDI: ffff940c7517aef0\n[42021.893230] RBP: ffff97fe90f03e70 R08: ffff94085f1aa000 R09: 0000000000000000\n[42021.900294] R10: ffff94085f1aa000 R11: ffffffffc0775680 R12: ffffffff87ca2530\n[42021.907355] R13: ffff940651602840 R14: ffff93c6cbbdbcb0 R15: ffff94085f1aa000\n[42021.914418] FS:  00007fda1a3b9700(0000) GS:ffff94453fb80000(0000) knlGS:0000000000000000\n[42021.922423] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[42021.928130] CR2: 0000000000000028 CR3: 00000042dcfb8003 CR4: 00000000003726f0\n[42021.935194] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[42021.942257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[42021.949324] Call Trace:\n[42021.951756]  \u003cTASK\u003e\n[42021.953842]  [\u003cffffffff86c58674\u003e] ? show_regs+0x64/0x70\n[42021.959030]  [\u003cffffffff86c58468\u003e] ? __die+0x78/0xc0\n[42021.963874]  [\u003cffffffff86c9ef75\u003e] ? page_fault_oops+0x2b5/0x3b0\n[42021.969749]  [\u003cffffffff87674b92\u003e] ? exc_page_fault+0x1a2/0x3c0\n[42021.975549]  [\u003cffffffff87801326\u003e] ? asm_exc_page_fault+0x26/0x30\n[42021.981517]  [\u003cffffffffc0775680\u003e] ? __pfx_show_hw_stats+0x10/0x10 [ib_core]\n[42021.988482]  [\u003cffffffffc077564e\u003e] ? hw_stat_device_show+0x1e/0x40 [ib_core]\n[42021.995438]  [\u003cffffffff86ac7f8e\u003e] dev_attr_show+0x1e/0x50\n[42022.000803]  [\u003cffffffff86a3eeb1\u003e] sysfs_kf_seq_show+0x81/0xe0\n[42022.006508]  [\u003cffffffff86a11134\u003e] seq_read_iter+0xf4/0x410\n[42022.011954]  [\u003cffffffff869f4b2e\u003e] vfs_read+0x16e/0x2f0\n[42022.017058]  [\u003cffffffff869f50ee\u003e] ksys_read+0x6e/0xe0\n[42022.022073]  [\u003cffffffff8766f1ca\u003e] do_syscall_64+0x6a/0xa0\n[42022.027441]  [\u003cffffffff8780013b\u003e] entry_SYSCALL_64_after_hwframe+0x78/0xe2\n\nThe problem can be reproduced using the following steps:\n  ip netns add foo\n  ip netns exec foo bash\n  cat /sys/class/infiniband/mlx4_0/hw_counters/*\n\nThe panic occurs because of casting the device pointer into an\nib_device pointer using container_of() in hw_stat_device_show() is\nwrong and leads to a memory corruption.\n\nHowever the real problem is that hw counters should never been exposed\noutside of the non-init net namespace.\n\nFix this by saving the index of the corresponding attribute group\n(it might be 1 or 2 depending on the presence of driver-specific\nattributes) and zeroing the pointer to hw_counters group for compat\ndevices during the initialization.\n\nWith this fix applied hw_counters are not available in a non-init\nnet namespace:\n  find /sys/class/infiniband/mlx4_0/ -name hw_counters\n    /sys/class/infiniband/mlx4_0/ports/1/hw_counters\n    /sys/class/infiniband/mlx4_0/ports/2/hw_counters\n    /sys/class/infiniband/mlx4_0/hw_counters\n\n  ip netns add foo\n  ip netns exec foo bash\n  find /sys/class/infiniband/mlx4_0/ -name hw_counters"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:18:14.244Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9a5b7f8842a90a5e6eeff37f9f6d814e61ea3529"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5212b99649c5740154f307e9e3d7fee9bf62773"
        },
        {
          "url": "https://git.kernel.org/stable/c/0cf80f924aecb5b2bebd4f4ad11b2efc676a0b78"
        },
        {
          "url": "https://git.kernel.org/stable/c/df45ae2a4f1cdfda00c032839e12092e1f32c05e"
        },
        {
          "url": "https://git.kernel.org/stable/c/c14d9704f5d77a7c7fa46e2114b64a4f75b64e17"
        },
        {
          "url": "https://git.kernel.org/stable/c/6682da5d8fd578a5068531d01633c9d2e4c8f12b"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1ecb30f90856b0be4168ad51b8875148e285c1f"
        }
      ],
      "title": "RDMA/core: Don\u0027t expose hw_counters outside of init net namespace",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-22089",
    "datePublished": "2025-04-16T14:12:41.732Z",
    "dateReserved": "2024-12-29T08:45:45.817Z",
    "dateUpdated": "2025-05-26T05:18:14.244Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-22089\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-16T15:16:03.110\",\"lastModified\":\"2025-04-17T20:22:16.240\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/core: Don\u0027t expose hw_counters outside of init net namespace\\n\\nCommit 467f432a521a (\\\"RDMA/core: Split port and device counter sysfs\\nattributes\\\") accidentally almost exposed hw counters to non-init net\\nnamespaces. It didn\u0027t expose them fully, as an attempt to read any of\\nthose counters leads to a crash like this one:\\n\\n[42021.807566] BUG: kernel NULL pointer dereference, address: 0000000000000028\\n[42021.814463] #PF: supervisor read access in kernel mode\\n[42021.819549] #PF: error_code(0x0000) - not-present page\\n[42021.824636] PGD 0 P4D 0\\n[42021.827145] Oops: 0000 [#1] SMP PTI\\n[42021.830598] CPU: 82 PID: 2843922 Comm: switchto-defaul Kdump: loaded Tainted: G S      W I        XXX\\n[42021.841697] Hardware name: XXX\\n[42021.849619] RIP: 0010:hw_stat_device_show+0x1e/0x40 [ib_core]\\n[42021.855362] Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 49 89 d0 4c 8b 5e 20 48 8b 8f b8 04 00 00 48 81 c7 f0 fa ff ff \u003c48\u003e 8b 41 28 48 29 ce 48 83 c6 d0 48 c1 ee 04 69 d6 ab aa aa aa 48\\n[42021.873931] RSP: 0018:ffff97fe90f03da0 EFLAGS: 00010287\\n[42021.879108] RAX: ffff9406988a8c60 RBX: ffff940e1072d438 RCX: 0000000000000000\\n[42021.886169] RDX: ffff94085f1aa000 RSI: ffff93c6cbbdbcb0 RDI: ffff940c7517aef0\\n[42021.893230] RBP: ffff97fe90f03e70 R08: ffff94085f1aa000 R09: 0000000000000000\\n[42021.900294] R10: ffff94085f1aa000 R11: ffffffffc0775680 R12: ffffffff87ca2530\\n[42021.907355] R13: ffff940651602840 R14: ffff93c6cbbdbcb0 R15: ffff94085f1aa000\\n[42021.914418] FS:  00007fda1a3b9700(0000) GS:ffff94453fb80000(0000) knlGS:0000000000000000\\n[42021.922423] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[42021.928130] CR2: 0000000000000028 CR3: 00000042dcfb8003 CR4: 00000000003726f0\\n[42021.935194] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[42021.942257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n[42021.949324] Call Trace:\\n[42021.951756]  \u003cTASK\u003e\\n[42021.953842]  [\u003cffffffff86c58674\u003e] ? show_regs+0x64/0x70\\n[42021.959030]  [\u003cffffffff86c58468\u003e] ? __die+0x78/0xc0\\n[42021.963874]  [\u003cffffffff86c9ef75\u003e] ? page_fault_oops+0x2b5/0x3b0\\n[42021.969749]  [\u003cffffffff87674b92\u003e] ? exc_page_fault+0x1a2/0x3c0\\n[42021.975549]  [\u003cffffffff87801326\u003e] ? asm_exc_page_fault+0x26/0x30\\n[42021.981517]  [\u003cffffffffc0775680\u003e] ? __pfx_show_hw_stats+0x10/0x10 [ib_core]\\n[42021.988482]  [\u003cffffffffc077564e\u003e] ? hw_stat_device_show+0x1e/0x40 [ib_core]\\n[42021.995438]  [\u003cffffffff86ac7f8e\u003e] dev_attr_show+0x1e/0x50\\n[42022.000803]  [\u003cffffffff86a3eeb1\u003e] sysfs_kf_seq_show+0x81/0xe0\\n[42022.006508]  [\u003cffffffff86a11134\u003e] seq_read_iter+0xf4/0x410\\n[42022.011954]  [\u003cffffffff869f4b2e\u003e] vfs_read+0x16e/0x2f0\\n[42022.017058]  [\u003cffffffff869f50ee\u003e] ksys_read+0x6e/0xe0\\n[42022.022073]  [\u003cffffffff8766f1ca\u003e] do_syscall_64+0x6a/0xa0\\n[42022.027441]  [\u003cffffffff8780013b\u003e] entry_SYSCALL_64_after_hwframe+0x78/0xe2\\n\\nThe problem can be reproduced using the following steps:\\n  ip netns add foo\\n  ip netns exec foo bash\\n  cat /sys/class/infiniband/mlx4_0/hw_counters/*\\n\\nThe panic occurs because of casting the device pointer into an\\nib_device pointer using container_of() in hw_stat_device_show() is\\nwrong and leads to a memory corruption.\\n\\nHowever the real problem is that hw counters should never been exposed\\noutside of the non-init net namespace.\\n\\nFix this by saving the index of the corresponding attribute group\\n(it might be 1 or 2 depending on the presence of driver-specific\\nattributes) and zeroing the pointer to hw_counters group for compat\\ndevices during the initialization.\\n\\nWith this fix applied hw_counters are not available in a non-init\\nnet namespace:\\n  find /sys/class/infiniband/mlx4_0/ -name hw_counters\\n    /sys/class/infiniband/mlx4_0/ports/1/hw_counters\\n    /sys/class/infiniband/mlx4_0/ports/2/hw_counters\\n    /sys/class/infiniband/mlx4_0/hw_counters\\n\\n  ip netns add foo\\n  ip netns exec foo bash\\n  find /sys/class/infiniband/mlx4_0/ -name hw_counters\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/core: No exponga hw_counters fuera del espacio de nombres init net. el commit 467f432a521a (\\\"RDMA/core: Dividir los atributos sysfs del contador de puerto y dispositivo\\\") casi expuso accidentalmente los contadores hw a espacios de nombres que no son init net. No los expuso completamente, ya que un intento de leer cualquiera de esos contadores conduce a un fallo como este: [42021.807566] ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000028 [42021.814463] #PF: acceso de lectura del supervisor en modo kernel [42021.819549] #PF: error_code(0x0000) - p\u00e1gina no presente [42021.824636] PGD 0 P4D 0 [42021.827145] Oops: 0000 [#1] SMP PTI [42021.830598] CPU: 82 PID: 2843922 Comm: switchto-defaul Kdump: cargado Tainted: GSWI XXX [42021.841697] Nombre del hardware: XXX [42021.849619] RIP: 0010:hw_stat_device_show+0x1e/0x40 [ib_core] [42021.855362] C\u00f3digo: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 49 89 d0 4c 8b 5e 20 48 8b 8f b8 04 00 00 48 81 c7 f0 fa ff ff \u0026lt;48\u0026gt; 8b 41 28 48 29 ce 48 83 c6 d0 48 c1 ee 04 69 d6 ab aa aa aa 48 [42021.873931] RSP: 0018:ffff97fe90f03da0 EFLAGS: 00010287 [42021.879108] RAX: ffff9406988a8c60 RBX: ffff940e1072d438 RCX: 000000000000000 [42021.886169] RDX: ffff94085f1aa000 RSI: ffff93c6cbbdbcb0 RDI: ffff940c7517aef0 [42021.893230] RBP: ffff97fe90f03e70 R08: ffff94085f1aa000 R09: 0000000000000000 [42021.900294] R10: ffff94085f1aa000 R11: ffffffffc0775680 R12: ffffffff87ca2530 [42021.907355] R13: ffff940651602840 R14: ffff93c6cbbdbcb0 R15: ffff94085f1aa000 [42021.914418] FS: 00007fda1a3b9700(0000) GS:ffff94453fb80000(0000) knlGS:0000000000000000 [42021.922423] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [42021.928130] CR2: 0000000000000028 CR3: 00000042dcfb8003 CR4: 000000000003726f0 [42021.935194] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [42021.942257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [42021.949324] Rastreo de llamadas: [42021.951756]  [42021.953842] [] ? show_regs+0x64/0x70 [42021.959030] [] ? __die+0x78/0xc0 [42021.963874] [] ? page_fault_oops+0x2b5/0x3b0 [42021.969749] [] ? asm_exc_page_fault+0x26/0x30 [42021.981517] [] ? __pfx_show_hw_stats+0x10/0x10 [ib_core] [42021.988482] [] ? hw_stat_device_show+0x1e/0x40 [ib_core] [42021.995438] [] dev_attr_show+0x1e/0x50 [42022.000803] [] sysfs_kf_seq_show+0x81/0xe0 [42022.006508] [] seq_read_iter+0xf4/0x410 [42022.011954] [] vfs_read+0x16e/0x2f0 [42022.017058] [] ksys_read+0x6e/0xe0 [42022.022073] [] do_syscall_64+0x6a/0xa0 [42022.027441] [] entry_SYSCALL_64_after_hwframe+0x78/0xe2 El problema se puede reproducir siguiendo estos pasos: ip netns add foo ip netns exec foo bash cat /sys/class/infiniband/mlx4_0/hw_counters/* El p\u00e1nico se produce porque la conversi\u00f3n del puntero del dispositivo en un puntero ib_device al usar container_of() en hw_stat_device_show() es incorrecta y provoca una corrupci\u00f3n de memoria. Sin embargo, el verdadero problema radica en que los contadores hw nunca deber\u00edan exponerse fuera del espacio de nombres de red no init. Para solucionarlo, guarde el \u00edndice del grupo de atributos correspondiente (podr\u00eda ser 1 o 2, dependiendo de la presencia de atributos espec\u00edficos del controlador) y ponga a cero el puntero al grupo hw_counters para dispositivos compatibles durante la inicializaci\u00f3n. Con esta correcci\u00f3n, los contadores hw_counters no est\u00e1n disponibles en un espacio de nombres de red no init: find /sys/class/infiniband/mlx4_0/ -name hw_counters /sys/class/infiniband/mlx4_0/ports/1/hw_counters /sys/class/infiniband/mlx4_0/ports/2/hw_counters /sys/class/infiniband/mlx4_0/hw_counters ip netns add foo ip netns exec foo bash find /sys/class/infiniband/mlx4_0/ -name hw_counters\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0cf80f924aecb5b2bebd4f4ad11b2efc676a0b78\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6682da5d8fd578a5068531d01633c9d2e4c8f12b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9a5b7f8842a90a5e6eeff37f9f6d814e61ea3529\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a1ecb30f90856b0be4168ad51b8875148e285c1f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c14d9704f5d77a7c7fa46e2114b64a4f75b64e17\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d5212b99649c5740154f307e9e3d7fee9bf62773\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/df45ae2a4f1cdfda00c032839e12092e1f32c05e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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