diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2021-10-13 16:55:48 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-10-21 14:02:25 +0200 |
| commit | be31dfdfd75b172af3ddcfa7511cdc3bb7adb25e (patch) | |
| tree | 78afe26b0af7da91e9984224711de2e26b6e9114 /arch/x86/kernel/fpu/core.c | |
| parent | 248452ce21aeb08da2d2af23d88f890886bd379f (diff) | |
| download | linux-be31dfdfd75b172af3ddcfa7511cdc3bb7adb25e.tar.gz | |
x86/fpu: Use fpstate::size
Make use of fpstate::size in various places which require the buffer size
information for sanity checks or memcpy() sizing.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211013145322.973518954@linutronix.de
Diffstat (limited to 'arch/x86/kernel/fpu/core.c')
| -rw-r--r-- | arch/x86/kernel/fpu/core.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index a8cc20e90751..cb48c80ce5e3 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -166,13 +166,12 @@ void fpu_swap_kvm_fpu(struct fpu *save, struct fpu *rstor, u64 restore_mask) fpregs_lock(); if (save) { - if (test_thread_flag(TIF_NEED_FPU_LOAD)) { - memcpy(&save->fpstate->regs, - ¤t->thread.fpu.fpstate->regs, - fpu_kernel_xstate_size); - } else { + struct fpstate *fpcur = current->thread.fpu.fpstate; + + if (test_thread_flag(TIF_NEED_FPU_LOAD)) + memcpy(&save->fpstate->regs, &fpcur->regs, fpcur->size); + else save_fpregs_to_fpstate(save); - } } if (rstor) { @@ -398,7 +397,7 @@ int fpu_clone(struct task_struct *dst) fpregs_lock(); if (test_thread_flag(TIF_NEED_FPU_LOAD)) { memcpy(&dst_fpu->fpstate->regs, &src_fpu->fpstate->regs, - fpu_kernel_xstate_size); + dst_fpu->fpstate->size); } else { save_fpregs_to_fpstate(dst_fpu); } |