Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/ast: Fix soft lockup There is a while-loop in ast_dp_set_on_off() that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BMC. These scratch registers are protected by scu-lock. If suc-lock is not off, DPMCU can not update these registers and then host will have soft lockup due to never updated status. DPMCU is used to control DP and relative registers to handshake with host's VGA driver. Even the most time-consuming task, DP's link training, is less than 100ms. 200ms should be enough.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54 before 8a6fea3fcb577a543ef67683ca7105bde49a38fb; affected 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54 before a81b2acd43e24e419f65df97348c76a5a1496066; affected 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54 before 35768baf0fdfc47ede42d899506bad78450e9294; affected 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54 before bc004f5038220b1891ef4107134ccae44be55109 |
| Linux / Linux | affected 5.19; unaffected 0 before 5.19; unaffected 6.1.87 through 6.1.*; unaffected 6.6.28 through 6.6.*; unaffected 6.8.7 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8a6fea3fcb577a543ef67683ca7105bde49a38fb
- https://git.kernel.org/stable/c/a81b2acd43e24e419f65df97348c76a5a1496066
- https://git.kernel.org/stable/c/35768baf0fdfc47ede42d899506bad78450e9294
- https://git.kernel.org/stable/c/bc004f5038220b1891ef4107134ccae44be55109
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.