Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: rcu/nocb: Fix possible invalid rdp's->nocb_cb_kthread pointer access In the preparation stage of CPU online, if the corresponding the rdp's->nocb_cb_kthread does not exist, will be created, there is a situation where the rdp's rcuop kthreads creation fails, and then de-offload this CPU's rdp, does not assign this CPU's rdp->nocb_cb_kthread pointer, but this rdp's->nocb_gp_rdp and rdp's->rdp_gp->nocb_gp_kthread is still valid. This will cause the subsequent re-offload operation of this offline CPU, which will pass the conditional check and the kthread_unpark() will access invalid rdp's->nocb_cb_kthread pointer. This commit therefore use rdp's->nocb_gp_kthread instead of rdp_gp's->nocb_gp_kthread for safety check.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3a5761dc025da47960755ac64d9fbf1c32e8cd80 before b097ae798298885695c339d390b48b4e39619fa7; affected 3a5761dc025da47960755ac64d9fbf1c32e8cd80 before 3da45ec1e485a1a5ad31fe9ddd467c7ee5ae4ef9; affected 3a5761dc025da47960755ac64d9fbf1c32e8cd80 before cce3d027227c69e85896af9fbc6fa9af5c68f067; affected 3a5761dc025da47960755ac64d9fbf1c32e8cd80 before 1c951683a720b17c9ecaad1932bc95b29044611f; affected 3a5761dc025da47960755ac64d9fbf1c32e8cd80 before 9b5ec8e6b31755288a07b3abeeab8cd38e9d3c9d; affected 3a5761dc025da47960755ac64d9fbf1c32e8cd80 before 1bba3900ca18bdae28d1b9fa10f16a8f8cb2ada1 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.1.167 through 6.1.*; unaffected 6.6.130 through 6.6.*; unaffected 6.12.43 through 6.12.*; unaffected 6.15.11 through 6.15.*; unaffected 6.16.2 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b097ae798298885695c339d390b48b4e39619fa7
- https://git.kernel.org/stable/c/3da45ec1e485a1a5ad31fe9ddd467c7ee5ae4ef9
- https://git.kernel.org/stable/c/cce3d027227c69e85896af9fbc6fa9af5c68f067
- https://git.kernel.org/stable/c/1c951683a720b17c9ecaad1932bc95b29044611f
- https://git.kernel.org/stable/c/9b5ec8e6b31755288a07b3abeeab8cd38e9d3c9d
- https://git.kernel.org/stable/c/1bba3900ca18bdae28d1b9fa10f16a8f8cb2ada1
ADP enrichment
No English description supplied.