Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
c9a6b82f45e261d247b980a7949aaa6a9bfffe01 to < 785cc093b6b5a93cc350421a55f3f1eda6585156affectedc9a6b82f45e261d247b980a7949aaa6a9bfffe01 to < 72e9a1bf9b722628c28092e0c2cd8717edd201dcaffectedc9a6b82f45e261d247b980a7949aaa6a9bfffe01 to < 248b061689a40f4fed05252ee2c89f87cf26d7d8affected
Linux Linux
Default version status: affected
5.10affected0 to < 5.10unaffected5.10.241 to ≤ 5.10.*unaffected5.14.12 to ≤ 5.14.*unaffected5.15 to ≤ *unaffected