CVE-2021-47188 scsi: ufs: core: Improve SCSI abort handling

2024-04-1018:56:27

Linux

www.cve.org

linux kernel

vulnerability

scsi

ufs

core

cpu

warning

driver

fix

cve

AI Score

7.5

Confidence

High

EPSS

Percentile

9.0%

JSON

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

scsi: ufs: core: Improve SCSI abort handling

The following has been observed on a test setup:

WARNING: CPU: 4 PID: 250 at drivers/scsi/ufs/ufshcd.c:2737 ufshcd_queuecommand+0x468/0x65c
Call trace:
ufshcd_queuecommand+0x468/0x65c
scsi_send_eh_cmnd+0x224/0x6a0
scsi_eh_test_devices+0x248/0x418
scsi_eh_ready_devs+0xc34/0xe58
scsi_error_handler+0x204/0x80c
kthread+0x150/0x1b4
ret_from_fork+0x10/0x30

That warning is triggered by the following statement:

WARN_ON(lrbp-&gt;cmd);

Fix this warning by clearing lrbp->cmd from the abort handler.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/scsi/ufs/ufshcd.c"
    ],
    "versions": [
      {
        "version": "7a3e97b0dc4b",
        "lessThan": "c36baca06efa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7a3e97b0dc4b",
        "lessThan": "3ff1f6b6ba6f",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/scsi/ufs/ufshcd.c"
    ],
    "versions": [
      {
        "version": "3.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.4",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.5",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]