---
id: CVE-2025-37802
title: 'ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING"'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING"

  wait_event_timeout() will set the state of the current
  task to TASK_UNINTERRUPTIBLE, before doing the …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 0626e6641f6b467447c81dd7678a69c66f7746cf <
    97aabdbf7ba82da20e698f0e62917fb206d42941
  - >-
    Linux >= 0626e6641f6b467447c81dd7678a69c66f7746cf <
    8f805b3746d2f41702c77cba22f94f8415fadd1a
  - >-
    Linux >= 0626e6641f6b467447c81dd7678a69c66f7746cf <
    cd161198e091e8a62b9bd631be970ea9a87d2d6a
  - >-
    Linux >= 0626e6641f6b467447c81dd7678a69c66f7746cf <
    1df0d4c616138784e033ad337961b6e1a6bcd999
  - Linux 5.15
published: '2025-05-08'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T11:57:58.953Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-37802'
references:
  - url: 'https://git.kernel.org/stable/c/97aabdbf7ba82da20e698f0e62917fb206d42941'
  - url: 'https://git.kernel.org/stable/c/8f805b3746d2f41702c77cba22f94f8415fadd1a'
  - url: 'https://git.kernel.org/stable/c/cd161198e091e8a62b9bd631be970ea9a87d2d6a'
  - url: 'https://git.kernel.org/stable/c/1df0d4c616138784e033ad337961b6e1a6bcd999'
tags:
  - cve.org
epss: 0.0034
epssPercentile: 0.276
ingestedAt: '2026-09-14T15:23:07.459Z'
---

## Overview

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

ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING"

wait_event_timeout() will set the state of the current
task to TASK_UNINTERRUPTIBLE, before doing the condition check. This
means that ksmbd_durable_scavenger_alive() will try to acquire the mutex
while already in a sleeping state. The scheduler warns us by giving
the following warning:

do not call blocking ops when !TASK_RUNNING; state=2 set at
 [<0000000061515a6f>] prepare_to_wait_event+0x9f/0x6c0
WARNING: CPU: 2 PID: 4147 at kernel/sched/core.c:10099 __might_sleep+0x12f/0x160

mutex lock is not needed in ksmbd_durable_scavenger_alive().

## Affected

- `Linux >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 97aabdbf7ba82da20e698f0e62917fb206d42941`
- `Linux >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 8f805b3746d2f41702c77cba22f94f8415fadd1a`
- `Linux >= 0626e6641f6b467447c81dd7678a69c66f7746cf < cd161198e091e8a62b9bd631be970ea9a87d2d6a`
- `Linux >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 1df0d4c616138784e033ad337961b6e1a6bcd999`
- `Linux 5.15`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.