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NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package kernel-selftests-internal  (opens in a new tab)

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EPSS
0.45% (37th percentile)

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  • Snyk IDSNYK-CENTOS8-KERNELSELFTESTSINTERNAL-10035941
  • published5 May 2025
  • disclosed2 May 2025
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Introduced: 2 May 2025

CVE-2023-53110  (opens in a new tab)
CWE-476  (opens in a new tab)

Amendment

The Centos security team deemed this advisory irrelevant for Centos:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-selftests-internal package and not the kernel-selftests-internal package as distributed by Centos.

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.