CVE-2022-48780 net/smc: Avoid overwriting the copies of clcsock callback functions

2024-07-1611:13:17

Linux

www.cve.org

linux kernel

net/smc

vulnerability

clcsock

callback functions

fallback

EPSS

Percentile

16.0%

JSON

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

net/smc: Avoid overwriting the copies of clcsock callback functions

The callback functions of clcsock will be saved and replaced during
the fallback. But if the fallback happens more than once, then the
copies of these callback functions will be overwritten incorrectly,
resulting in a loop call issue:

clcsk->sk_error_report
|- smc_fback_error_report() <------------------------------|
|- smc_fback_forward_wakeup() | (loop)
|- clcsock_callback() (incorrectly overwritten) |
|- smc->clcsk_error_report() ------------------|

So this patch fixes the issue by saving these function pointers only
once in the fallback and avoiding overwriting.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/smc/af_smc.c"
    ],
    "versions": [
      {
        "version": "0ef6049f6649",
        "lessThan": "7de7ba7a8bd4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "504078fbe9dd",
        "lessThan": "f00b6c976ae0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "341adeec9ada",
        "lessThan": "1de9770d121e",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/smc/af_smc.c"
    ],
    "versions": [
      {
        "version": "5.15.22",
        "lessThan": "5.15.25",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "5.16.8",
        "lessThan": "5.16.11",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]