CVE-2025-21817 Information

Mar 01, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

block: mark GFP_NOIO around sysfs ->store()

sysfs ->store is called with queue freezed meantime we have several ->store() callbacks(update_nr_requests wbt scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path then potential deadlock can be caused.

Fix the issue by marking NOIO around sysfs ->store()

Reference

https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31 https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c

CNNVD-202508-1398 (Published: 2025-08-13)

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