diff options
Diffstat (limited to 'arch/x86/kernel/fpu/signal.c')
-rw-r--r-- | arch/x86/kernel/fpu/signal.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c index 9bfffdb64c0d..5ca3ce94cf6b 100644 --- a/arch/x86/kernel/fpu/signal.c +++ b/arch/x86/kernel/fpu/signal.c @@ -189,6 +189,18 @@ int copy_fpstate_to_sigframe(void __user *buf, void __user *buf_fx, int size) if (!access_ok(buf, size)) return -EACCES; + + if (use_xsave()) { + struct xregs_state __user *xbuf = buf_fx; + + /* + * Clear the xsave header first, so that reserved fields are + * initialized to zero. + */ + ret = __clear_user(&xbuf->header, sizeof(xbuf->header)); + if (unlikely(ret)) + return ret; + } retry: /* * Load the FPU registers if they are not valid for the current task. |