CVE-2024-26775
aoe: avoid potential deadlock at set_capacity
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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);
<Interrupt>
[4] lock(&d->lock);
*** DEADLOCK ***
Where [1](&bdev->bd_size_lock) hold by zram_add()->set_capacity().
[2]lock(&d->lock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc()
is trying to acquire [3](&bdev->bd_size_lock) 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](&d->lock) -> [3](&bdev->bd_size_lock) by moving set_capacity()
outside.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: aoe: evita un posible punto muerto en set_capacity Mueve set_capacity() fuera de la sección procesada por (&d->lock). Para evitar una posible interrupción en un escenario de bloqueo inseguro: CPU0 CPU1 ---- ---- [1] lock(&bdev->bd_size_lock); local_irq_disable(); [2] bloquear(&d->bloquear); [3] bloquear(&bdev->bd_size_lock); [4] bloqueo(&d->bloqueo); *** DEADLOCK *** Donde [1](&bdev->bd_size_lock) mantenido por zram_add()->set_capacity(). [2]bloqueo(&d->bloqueo) retenido por aoeblk_gdalloc(). Y aoeblk_gdalloc() está intentando adquirir [3](&bdev->bd_size_lock) en la llamada set_capacity(). En esta situación, un intento de adquirir [4]lock(&d->lock) de aoecmd_cfg_rsp() provocará un punto muerto. Entonces, la solución más simple es romper la dependencia del bloqueo [2](&d->lock) -> [3](&bdev->bd_size_lock) moviendo set_capacity() afuera.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-19 CVE Reserved
- 2024-04-03 CVE Published
- 2024-04-04 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (4)
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Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.1.80 Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.80" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.6.19 Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.19" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.7.7 Search vendor "Linux" for product "Linux Kernel" and version " < 6.7.7" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " < 6.8" | en |
Affected
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