Le Wed, May 07, 2025 at 07:26:05PM +0800, Zqiang a écrit : > 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. > > Signed-off-by: Zqiang <qiang.zhang1...@gmail.com>
Reviewed-by: Frederic Weisbecker <frede...@kernel.org> -- Frederic Weisbecker SUSE Labs
