1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index b2adcce7bc18..6b7dcf4310ac 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -314,6 +314,15 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start,
         clear_tsk_thread_flag(p, TIF_SVE);
         p->thread.sve_state = NULL;
 
+        /*
+         * In case p was allocated the same task_struct pointer as some
+         * other recently-exited task, make sure p is disassociated from
+         * any cpu that may have run that now-exited task recently.
+         * Otherwise we could erroneously skip reloading the FPSIMD
+         * registers for p.
+         */
+        fpsimd_flush_task_state(p);
+
         if (likely(!(p->flags & PF_KTHREAD))) {
                 *childregs = *current_pt_regs();
                 childregs->regs[0] = 0;