diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-18 09:43:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-18 09:43:37 +0200 |
| commit | b5bc8ac25aa1477fee3853718f2673a594efdc4b (patch) | |
| tree | dcee1a7ae080d573c12a4a0411b9417746ffd343 /arch/x86/kernel/fpu/signal.c | |
| parent | 1f8818e352f721c49ebea39025f6c98f25756eff (diff) | |
| parent | 519d81956ee277b4419c723adfb154603c2565ba (diff) | |
Merge 5.15-rc6 into driver-core-next
We need the driver-core fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kernel/fpu/signal.c')
| -rw-r--r-- | arch/x86/kernel/fpu/signal.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c index 445c57c9c539..831b25c5e705 100644 --- a/arch/x86/kernel/fpu/signal.c +++ b/arch/x86/kernel/fpu/signal.c @@ -379,9 +379,14 @@ static int __fpu_restore_sig(void __user *buf, void __user *buf_fx, sizeof(fpu->state.fxsave))) return -EFAULT; - /* Reject invalid MXCSR values. */ - if (fpu->state.fxsave.mxcsr & ~mxcsr_feature_mask) - return -EINVAL; + if (IS_ENABLED(CONFIG_X86_64)) { + /* Reject invalid MXCSR values. */ + if (fpu->state.fxsave.mxcsr & ~mxcsr_feature_mask) + return -EINVAL; + } else { + /* Mask invalid bits out for historical reasons (broken hardware). */ + fpu->state.fxsave.mxcsr &= mxcsr_feature_mask; + } /* Enforce XFEATURE_MASK_FPSSE when XSAVE is enabled */ if (use_xsave()) |