![Advisory Published](https://public.secalerts.co/assets/images/icon-advisory-published.svg)
16/7/2024
![Updated](https://public.secalerts.co/assets/images/icon-updated.svg)
3/8/2024
CVE-2022-48846: block: release rq qos structures for queue without disk
First published: Tue Jul 16 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved:
block: release rq qos structures for queue without disk
blkcg_init_queue() may add rq qos structures to request queue, previously
blk_cleanup_queue() calls rq_qos_exit() to release them, but commit
8e141f9eb803 ("block: drain file system I/O on del_gendisk")
moves rq_qos_exit() into del_gendisk(), so memory leak is caused
because queues may not have disk, such as un-present scsi luns, nvme
admin queue, ...
Fixes the issue by adding rq_qos_exit() to blk_cleanup_queue() back.
BTW, v5.18 won't need this patch any more since we move
blkcg_init_queue()/blkcg_exit_queue() into disk allocation/release
handler, and patches have been in for-5.18/block.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Software | Affected Version | How to fix |
---|
Linux Linux kernel | >=5.15<5.15.31 | |
Linux Linux kernel | >=5.16<5.16.17 | |
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