CVE-2025-37802

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().

This vulnerability is rated as Moderate severity because triggering it requires interaction with the in-kernel SMB server daemon and results in scheduler warnings or potential thread stalls without compromising confidentiality or integrity. Red Hat Enterprise Linux products are not affected by this flaw because the vulnerable ksmbd code is not present or enabled in supported enterprise kernels. Typical enterprise deployments rely instead on user-space Samba implementations, leaving default environments unaffected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.