diff options
Diffstat (limited to 'arch/x86/kernel/fpu/signal.c')
| -rw-r--r-- | arch/x86/kernel/fpu/signal.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c index a184c21..3ec0d2d 100644 --- a/arch/x86/kernel/fpu/signal.c +++ b/arch/x86/kernel/fpu/signal.c @@ -329,6 +329,10 @@ static int __fpu__restore_sig(void __user *buf, void __user *buf_fx, int size) } else { err = __copy_from_user(&fpu->state.xsave, buf_fx, state_size); + + /* xcomp_bv must be 0 when using uncompacted format */ + if (!err && state_size > offsetof(struct xregs_state, header) && fpu->state.xsave.header.xcomp_bv) + err = -EINVAL; } if (err || __copy_from_user(&env, buf, sizeof(env))) { |