diff options
Diffstat (limited to 'arch/x86/kernel/fpu/signal.c')
| -rw-r--r-- | arch/x86/kernel/fpu/signal.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c index 9393a445d73c..a4ec65317a7f 100644 --- a/arch/x86/kernel/fpu/signal.c +++ b/arch/x86/kernel/fpu/signal.c @@ -170,14 +170,15 @@ int copy_fpstate_to_sigframe(void __user *buf, void __user *buf_fx, int size) ia32_fxstate &= (IS_ENABLED(CONFIG_X86_32) || IS_ENABLED(CONFIG_IA32_EMULATION)); + if (!static_cpu_has(X86_FEATURE_FPU)) { + struct user_i387_ia32_struct fp; + fpregs_soft_get(current, NULL, (struct membuf){.p = &fp, + .left = sizeof(fp)}); + return copy_to_user(buf, &fp, sizeof(fp)) ? -EFAULT : 0; + } + if (!access_ok(buf, size)) return -EACCES; - - if (!static_cpu_has(X86_FEATURE_FPU)) - return fpregs_soft_get(current, NULL, 0, - sizeof(struct user_i387_ia32_struct), NULL, - (struct _fpstate_32 __user *) buf) ? -1 : 1; - retry: /* * Load the FPU registers if they are not valid for the current task. |