cve-2021-47438
Vulnerability from cvelistv5
Published
2024-05-22 06:19
Modified
2024-11-04 12:05
Severity ?
Summary
net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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                "id": "CVE-2021-47438",
                "options": [
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                "role": "CISA Coordinator",
                "timestamp": "2024-06-17T18:03:33.416738Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/cq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "vendor": "Linux",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path\n\nPrior to this patch in case mlx5_core_destroy_cq() failed it returns\nwithout completing all destroy operations and that leads to memory leak.\nInstead, complete the destroy flow before return error.\n\nAlso move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq()\nto be symmetrical with mlx5_core_create_cq().\n\nkmemleak complains on:\n\nunreferenced object 0xc000000038625100 (size 64):\n  comm \"ethtool\", pid 28301, jiffies 4298062946 (age 785.380s)\n  hex dump (first 32 bytes):\n    60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0  `.H.......4.....\n    02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0  ..........}.....\n  backtrace:\n    [\u003c000000009e8643cb\u003e] add_res_tree+0xd0/0x270 [mlx5_core]\n    [\u003c00000000e7cb8e6c\u003e] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core]\n    [\u003c000000002a12918f\u003e] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core]\n    [\u003c00000000cef0a696\u003e] mlx5e_create_cq+0x210/0x3f0 [mlx5_core]\n    [\u003c000000009c642c26\u003e] mlx5e_open_cq+0xb4/0x130 [mlx5_core]\n    [\u003c0000000058dfa578\u003e] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core]\n    [\u003c0000000081839561\u003e] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core]\n    [\u003c0000000009cf05d4\u003e] mlx5e_switch_priv_channels+0xa4/0x230\n[mlx5_core]\n    [\u003c0000000042bbedd8\u003e] mlx5e_safe_switch_params+0x14c/0x300\n[mlx5_core]\n    [\u003c0000000004bc9db8\u003e] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core]\n    [\u003c00000000a0553443\u003e] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core]\n    [\u003c00000000a8f3d84b\u003e] ethnl_set_privflags+0x234/0x2d0\n    [\u003c00000000fd27f27c\u003e] genl_family_rcv_msg_doit+0x108/0x1d0\n    [\u003c00000000f495e2bb\u003e] genl_family_rcv_msg+0xe4/0x1f0\n    [\u003c00000000646c5c2c\u003e] genl_rcv_msg+0x78/0x120\n    [\u003c00000000d53e384e\u003e] netlink_rcv_skb+0x74/0x1a0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47438",
    "datePublished": "2024-05-22T06:19:33.537Z",
    "dateReserved": "2024-05-21T14:58:30.831Z",
    "dateUpdated": "2024-11-04T12:05:54.101Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47438\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T07:15:09.080\",\"lastModified\":\"2024-05-22T12:46:53.887\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path\\n\\nPrior to this patch in case mlx5_core_destroy_cq() failed it returns\\nwithout completing all destroy operations and that leads to memory leak.\\nInstead, complete the destroy flow before return error.\\n\\nAlso move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq()\\nto be symmetrical with mlx5_core_create_cq().\\n\\nkmemleak complains on:\\n\\nunreferenced object 0xc000000038625100 (size 64):\\n  comm \\\"ethtool\\\", pid 28301, jiffies 4298062946 (age 785.380s)\\n  hex dump (first 32 bytes):\\n    60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0  `.H.......4.....\\n    02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0  ..........}.....\\n  backtrace:\\n    [\u003c000000009e8643cb\u003e] add_res_tree+0xd0/0x270 [mlx5_core]\\n    [\u003c00000000e7cb8e6c\u003e] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core]\\n    [\u003c000000002a12918f\u003e] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core]\\n    [\u003c00000000cef0a696\u003e] mlx5e_create_cq+0x210/0x3f0 [mlx5_core]\\n    [\u003c000000009c642c26\u003e] mlx5e_open_cq+0xb4/0x130 [mlx5_core]\\n    [\u003c0000000058dfa578\u003e] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core]\\n    [\u003c0000000081839561\u003e] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core]\\n    [\u003c0000000009cf05d4\u003e] mlx5e_switch_priv_channels+0xa4/0x230\\n[mlx5_core]\\n    [\u003c0000000042bbedd8\u003e] mlx5e_safe_switch_params+0x14c/0x300\\n[mlx5_core]\\n    [\u003c0000000004bc9db8\u003e] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core]\\n    [\u003c00000000a0553443\u003e] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core]\\n    [\u003c00000000a8f3d84b\u003e] ethnl_set_privflags+0x234/0x2d0\\n    [\u003c00000000fd27f27c\u003e] genl_family_rcv_msg_doit+0x108/0x1d0\\n    [\u003c00000000f495e2bb\u003e] genl_family_rcv_msg+0xe4/0x1f0\\n    [\u003c00000000646c5c2c\u003e] genl_rcv_msg+0x78/0x120\\n    [\u003c00000000d53e384e\u003e] netlink_rcv_skb+0x74/0x1a0\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/mlx5e: corrige la p\u00e9rdida de memoria en la ruta de error mlx5_core_destroy_cq(). Antes de este parche, en caso de que mlx5_core_destroy_cq() fallara, regresa sin completar todas las operaciones de destrucci\u00f3n y eso conduce a una p\u00e9rdida de memoria. En su lugar, complete el flujo de destrucci\u00f3n antes de que se produzca el error de devoluci\u00f3n. Tambi\u00e9n mueva mlx5_debug_cq_remove() al principio de mlx5_core_destroy_cq() para que sea sim\u00e9trico con mlx5_core_create_cq(). kmemleak se queja de: objeto sin referencia 0xc000000038625100 (tama\u00f1o 64): comm \\\"ethtool\\\", pid 28301, jiffies 4298062946 (edad 785.380 s) volcado hexadecimal (primeros 32 bytes): 60 01 48 94 00 00 00 c0 b8 05 34 3 00 00 00 c0 `.H.......4..... 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}..... rastreo hacia atr\u00e1s : [\u0026lt;000000009e8643cb\u0026gt;] add_res_tree+0xd0/0x270 [mlx5_core] [\u0026lt;00000000e7cb8e6c\u0026gt;] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core] [\u0026lt;000000002a12918f\u0026gt;] 0x1d0/0x2d0 [mlx5_core] [\u0026lt;00000000cef0a696\u0026gt;] mlx5e_create_cq+0x210/0x3f0 [mlx5_core] [\u0026lt;000000009c642c26\u0026gt;] mlx5e_open_cq+0xb4/0x130 [mlx5_core] [\u0026lt;0000000058dfa578\u0026gt;] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core] [\u0026lt;0000000081839561\u0026gt;] 5e_open_channels+0x9cc/0x13e0 [mlx5_core] [\u0026lt;0000000009cf05d4\u0026gt;] mlx5e_switch_priv_channels+0xa4 /0x230 [mlx5_core] [\u0026lt;0000000042bbedd8\u0026gt;] mlx5e_safe_switch_params+0x14c/0x300 [mlx5_core] [\u0026lt;0000000004bc9db8\u0026gt;] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core [\u0026lt;00000000a] 0553443\u0026gt;] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core] [\u0026lt;00000000a8f3d84b\u0026gt;] etnl_set_privflags +0x234/0x2d0 [\u0026lt;00000000fd27f27c\u0026gt;] genl_family_rcv_msg_doit+0x108/0x1d0 [\u0026lt;00000000f495e2bb\u0026gt;] genl_family_rcv_msg+0xe4/0x1f0 [\u0026lt;00000000646c5c2c\u0026gt;] v_msg+0x78/0x120 [\u0026lt;00000000d53e384e\u0026gt;] netlink_rcv_skb+0x74/0x1a0\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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