In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: handle the case of pci_channel_io_frozen only in amdgpu_pci_resume
In current code, when a PCI error state pci_channel_io_normal is detectd,
it will report PCI_ERS_RESULT_CAN_RECOVER status to PCI driver, and PCI
driver will continue the execution of PCI resume callback report_resume by
pci_walk_bridge, and the callback will go into amdgpu_pci_resume
finally, where write lock is releasd unconditionally without acquiring
such lock first. In this case, a deadlock will happen when other threads
start to acquire the read lock.
To fix this, add a member in amdgpu_device strucutre to cache
pci_channel_state, and only continue the execution in amdgpu_pci_resume
when it's pci_channel_io_frozen.
References
Configurations
Configuration 1 (hide)
|
History
25 Sep 2025, 16:09
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux
Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| CWE | CWE-667 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/248b061689a40f4fed05252ee2c89f87cf26d7d8 - Patch | |
| References | () https://git.kernel.org/stable/c/72e9a1bf9b722628c28092e0c2cd8717edd201dc - Patch | |
| References | () https://git.kernel.org/stable/c/785cc093b6b5a93cc350421a55f3f1eda6585156 - Patch |
28 Aug 2025, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Information
Published : 2024-05-21 15:15
Updated : 2025-09-25 16:09
NVD link : CVE-2021-47421
Mitre link : CVE-2021-47421
CVE.ORG link : CVE-2021-47421
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking