VYPR
Unrated severityNVD Advisory· Published May 20, 2024· Updated Dec 23, 2025

block: fix q->blkg_list corruption during disk rebind

CVE-2024-35974

Description

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

block: fix q->blkg_list corruption during disk rebind

Multiple gendisk instances can allocated/added for single request queue in case of disk rebind. blkg may still stay in q->blkg_list when calling blkcg_init_disk() for rebind, then q->blkg_list becomes corrupted.

Fix the list corruption issue by:

  • add blkg_init_queue() to initialize q->blkg_list & q->blkcg_mutex only
  • move calling blkg_init_queue() into blk_alloc_queue()

The list corruption should be started since commit f1c006f1c685 ("blk-cgroup: synchronize pd_free_fn() from blkg_free_workfn() and blkcg_deactivate_policy()") which delays removing blkg from q->blkg_list into blkg_free_workfn().

Affected products

52

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

5

News mentions

0

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