Add a warning in case a disabled (not existing) xstate component offset is requested.
Signed-off-by: Yu-cheng Yu <[email protected]> --- arch/x86/kernel/fpu/xstate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 350814c..2e6dbfe 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -756,6 +756,7 @@ void *__raw_xsave_addr(struct xregs_state *xsave, int xstate_feature_mask) { int feature_nr = fls64(xstate_feature_mask) - 1; + WARN_ON_FPU(using_compacted_format() && !xfeature_enabled(feature_nr)); return (void *)xsave + xstate_comp_offsets[feature_nr]; } -- 1.9.1
