VYPR
← All advisories
Unrated severityNVD Advisory· Published Apr 3, 2024· Updated Jan 5, 2026

aoe: avoid potential deadlock at set_capacity

CVE-2024-26775

Description

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

aoe: avoid potential deadlock at set_capacity

Move set_capacity() outside of the section procected by (&d->lock). To avoid possible interrupt unsafe locking scenario:

CPU0 CPU1 ---- ---- [1] lock(&bdev->bd_size_lock); local_irq_disable(); [2] lock(&d->lock); [3] lock(&bdev->bd_size_lock);

[4] lock(&d->lock);

* DEADLOCK *

Where 1 hold by zram_add()->set_capacity(). [2]lock(&d->lock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc() is trying to acquire 3 at set_capacity() call. In this situation an attempt to acquire [4]lock(&d->lock) from aoecmd_cfg_rsp() will lead to deadlock.

So the simplest solution is breaking lock dependency 2 -> 3 by moving set_capacity() outside.

Affected products

115

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

5

News mentions

0

No linked articles in our index yet.