ghsa-vm5r-r7q6-4cwx
Vulnerability from github
Published
2025-05-02 18:31
Modified
2025-05-02 18:31
Details

In the Linux kernel, the following vulnerability has been resolved:

net/smc: fix NULL sndbuf_desc in smc_cdc_tx_handler()

When performing a stress test on SMC-R by rmmod mlx5_ib driver during the wrk/nginx test, we found that there is a probability of triggering a panic while terminating all link groups.

This issue dues to the race between smc_smcr_terminate_all() and smc_buf_create().

        smc_smcr_terminate_all

smc_buf_create / init / conn->sndbuf_desc = NULL; ...

        __smc_lgr_terminate
            smc_conn_kill
                smc_close_abort
                    smc_cdc_get_slot_and_msg_send

        __softirqentry_text_start
            smc_wr_tx_process_cqe
                smc_cdc_tx_handler
                    READ(conn->sndbuf_desc->len);
                    /* panic dues to NULL sndbuf_desc */

conn->sndbuf_desc = xxx;

This patch tries to fix the issue by always to check the sndbuf_desc before send any cdc msg, to make sure that no null pointer is seen during cqe processing.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53110"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-02T16:15:29Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix NULL sndbuf_desc in smc_cdc_tx_handler()\n\nWhen performing a stress test on SMC-R by rmmod mlx5_ib driver\nduring the wrk/nginx test, we found that there is a probability\nof triggering a panic while terminating all link groups.\n\nThis issue dues to the race between smc_smcr_terminate_all()\nand smc_buf_create().\n\n\t\t\tsmc_smcr_terminate_all\n\nsmc_buf_create\n/* init */\nconn-\u003esndbuf_desc = NULL;\n...\n\n\t\t\t__smc_lgr_terminate\n\t\t\t\tsmc_conn_kill\n\t\t\t\t\tsmc_close_abort\n\t\t\t\t\t\tsmc_cdc_get_slot_and_msg_send\n\n\t\t\t__softirqentry_text_start\n\t\t\t\tsmc_wr_tx_process_cqe\n\t\t\t\t\tsmc_cdc_tx_handler\n\t\t\t\t\t\tREAD(conn-\u003esndbuf_desc-\u003elen);\n\t\t\t\t\t\t/* panic dues to NULL sndbuf_desc */\n\nconn-\u003esndbuf_desc = xxx;\n\nThis patch tries to fix the issue by always to check the sndbuf_desc\nbefore send any cdc msg, to make sure that no null pointer is\nseen during cqe processing.",
  "id": "GHSA-vm5r-r7q6-4cwx",
  "modified": "2025-05-02T18:31:37Z",
  "published": "2025-05-02T18:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53110"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22a825c541d775c1dbe7b2402786025acad6727b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31817c530768b0199771ec6019571b4f0ddbf230"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c270435db8aa34929263dddae8fd050f5216ecb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ebac7cf0a184a8102821a7a00203f02bebda83c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b108bd9e6be000492ebebe867daa699285978a10"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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