CVE-2025-38354
drm/msm/gpu: Fix crash when throttling GPU immediately during boot
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved: drm/msm/gpu: Fix crash when throttling GPU immediately during boot There is a small chance that the GPU is already hot during boot. In that
case, the call to of_devfreq_cooling_register() will immediately try to
apply devfreq cooling, as seen in the following crash: Unable to handle kernel paging request at virtual address 0000000000014110 pc : a6xx_gpu_busy+0x1c/0x58 [msm] lr : msm_devfreq_get_dev_status+0xbc/0x140 [msm] Call trace: a6xx_gpu_busy+0x1c/0x58 [msm] (P) devfreq_simple_ondemand_func+0x3c/0x150 devfreq_update_target+0x44/0xd8 qos_max_notifier_call+0x30/0x84 blocking_notifier_call_chain+0x6c/0xa0 pm_qos_update_target+0xd0/0x110 freq_qos_apply+0x3c/0x74 apply_constraint+0x88/0x148 __dev_pm_qos_update_request+0x7c/0xcc dev_pm_qos_update_request+0x38/0x5c devfreq_cooling_set_cur_state+0x98/0xf0 __thermal_cdev_update+0x64/0xb4 thermal_cdev_update+0x4c/0x58 step_wise_manage+0x1f0/0x318 __thermal_zone_device_update+0x278/0x424 __thermal_cooling_device_register+0x2bc/0x308 thermal_of_cooling_device_register+0x10/0x1c of_devfreq_cooling_register_power+0x240/0x2bc of_devfreq_cooling_register+0x14/0x20 msm_devfreq_init+0xc4/0x1a0 [msm] msm_gpu_init+0x304/0x574 [msm] adreno_gpu_init+0x1c4/0x2e0 [msm] a6xx_gpu_init+0x5c8/0x9c8 [msm] adreno_bind+0x2a8/0x33c [msm] ... At this point we haven't initialized the GMU at all yet, so we cannot read
the GMU registers inside a6xx_gpu_busy(). A similar issue was fixed before
in commit 6694482a70e9 ("drm/msm: Avoid unclocked GMU register access in
6xx gpu_busy"): msm_devfreq_init() does call devfreq_suspend_device(), but
unlike msm_devfreq_suspend(), it doesn't set the df->suspended flag
accordingly. This means the df->suspended flag does not match the actual
devfreq state after initialization and msm_devfreq_get_dev_status() will
end up accessing GMU registers, causing the crash. Fix this by setting df->suspended correctly during initialization. Patchwork: https://patchwork.freedesktop.org/patch/650772/
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/msm/gpu: se corrige el fallo que se produce al limitar la GPU inmediatamente durante el arranque. Existe una pequeña posibilidad de que la GPU ya esté caliente durante el arranque. En ese caso, la llamada a of_devfreq_cooling_register() intentará inmediatamente aplicar el enfriamiento devfreq, como se ve en el siguiente fallo: No se puede manejar la solicitud de paginación del kernel en la dirección virtual 0000000000014110 pc : a6xx_gpu_busy+0x1c/0x58 [msm] lr : msm_devfreq_get_dev_status+0xbc/0x140 [msm] Call trace: a6xx_gpu_busy+0x1c/0x58 [msm] (P) devfreq_simple_ondemand_func+0x3c/0x150 devfreq_update_target+0x44/0xd8 qos_max_notifier_call+0x30/0x84 blocking_notifier_call_chain+0x6c/0xa0 pm_qos_update_target+0xd0/0x110 freq_qos_apply+0x3c/0x74 apply_constraint+0x88/0x148 __dev_pm_qos_update_request+0x7c/0xcc dev_pm_qos_update_request+0x38/0x5c devfreq_cooling_set_cur_state+0x98/0xf0 __thermal_cdev_update+0x64/0xb4 thermal_cdev_update+0x4c/0x58 step_wise_manage+0x1f0/0x318 __thermal_zone_device_update+0x278/0x424 __thermal_cooling_device_register+0x2bc/0x308 thermal_of_cooling_device_register+0x10/0x1c of_devfreq_cooling_register_power+0x240/0x2bc of_devfreq_cooling_register+0x14/0x20 msm_devfreq_init+0xc4/0x1a0 [msm] msm_gpu_init+0x304/0x574 [msm] adreno_gpu_init+0x1c4/0x2e0 [msm] a6xx_gpu_init+0x5c8/0x9c8 [msm] adreno_bind+0x2a8/0x33c [msm] ... En este punto, aún no hemos inicializado la GMU en absoluto, por lo que no podemos leer los registros de la GMU dentro de a6xx_gpu_busy(). Un problema similar se solucionó previamente en el commit 6694482a70e9 ("drm/msm: Evitar el acceso a registros de GMU sin reloj en 6xx gpu_busy"): msm_devfreq_init() llama a devfreq_suspend_device(), pero a diferencia de msm_devfreq_suspend(), no establece el indicador df->suspended como corresponde. Esto significa que el indicador df->suspended no coincide con el estado real de devfreq tras la inicialización y msm_devfreq_get_dev_status() accederá a los registros de GMU, lo que provocará el bloqueo. Para solucionarlo, configure df->suspended correctamente durante la inicialización. Patchwork: https://patchwork.freedesktop.org/patch/650772/
This update provides the initial livepatch for this kernel update. This update does not contain any fixes and will be updated with livepatches later.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2025-04-16 CVE Reserved
- 2025-07-25 CVE Published
- 2025-07-28 CVE Updated
- 2025-08-26 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/6694482a70e9536efbf2ac233cbf0c302d6e2dae | Vuln. Introduced | |
| https://git.kernel.org/stable/c/1f6c087dd6a915f1c3471f0f0f696847fc8c592f | Vuln. Introduced | |
| https://git.kernel.org/stable/c/9c8b3f05fb18fba12f3fca80a378c9b8f3d04cd6 | Vuln. Introduced |
| URL | Date | SRC |
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| URL | Date | SRC |
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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" | >= 6.0 < 6.1.143 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.1.143" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.6.96 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.6.96" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.12.36 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.12.36" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.15.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.15.5" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.16" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.18.18 Search vendor "Linux" for product "Linux Kernel" and version "5.18.18" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.19.2 Search vendor "Linux" for product "Linux Kernel" and version "5.19.2" | en |
Affected
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