Description
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 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
3a5761dc025da47960755ac64d9fbf1c32e8cd80 to < b097ae798298885695c339d390b48b4e39619fa7affected3a5761dc025da47960755ac64d9fbf1c32e8cd80 to < 3da45ec1e485a1a5ad31fe9ddd467c7ee5ae4ef9affected3a5761dc025da47960755ac64d9fbf1c32e8cd80 to < cce3d027227c69e85896af9fbc6fa9af5c68f067affected3a5761dc025da47960755ac64d9fbf1c32e8cd80 to < 1c951683a720b17c9ecaad1932bc95b29044611faffected3a5761dc025da47960755ac64d9fbf1c32e8cd80 to < 9b5ec8e6b31755288a07b3abeeab8cd38e9d3c9daffected3a5761dc025da47960755ac64d9fbf1c32e8cd80 to < 1bba3900ca18bdae28d1b9fa10f16a8f8cb2ada1affected
Linux Linux
Default version status: affected
6.0affected0 to < 6.0unaffected6.1.167 to ≤ 6.1.*unaffected6.6.130 to ≤ 6.6.*unaffected6.12.43 to ≤ 6.12.*unaffected6.15.11 to ≤ 6.15.*unaffected6.16.2 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
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 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗