From the test case, it's a regression-test for the following two commits:
df24fb85 (x86, fpu: __restore_xstate_sig()->math_state_restore() needs preempt_disable())
66463db4 (x86, fpu: shift drop_init_fpu() from save_xstate_sig() to handle_signal())
They're all available in Eoan GCP tree.
Further investigation is needed.
From the test case, it's a regression-test for the following two commits: xstate_ sig()-> math_state_ restore( ) needs preempt_disable())
df24fb85 (x86, fpu: __restore_
66463db4 (x86, fpu: shift drop_init_fpu() from save_xstate_sig() to handle_signal())
They're all available in Eoan GCP tree.
Further investigation is needed.