diff options
Diffstat (limited to 'arch/x86/kernel/fpu/regset.c')
| -rw-r--r-- | arch/x86/kernel/fpu/regset.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/kernel/fpu/regset.c b/arch/x86/kernel/fpu/regset.c index 0bc3490420c5..72a483c295f2 100644 --- a/arch/x86/kernel/fpu/regset.c +++ b/arch/x86/kernel/fpu/regset.c @@ -116,6 +116,11 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset, xsave = &fpu->state.xsave; ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, xsave, 0, -1); + + /* xcomp_bv must be 0 when using uncompacted format */ + if (!ret && xsave->header.xcomp_bv) + ret = -EINVAL; + /* * mxcsr reserved bits must be masked to zero for security reasons. */ @@ -126,6 +131,12 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset, */ memset(&xsave->header.reserved, 0, 48); + /* + * In case of failure, mark all states as init: + */ + if (ret) + fpstate_init(&fpu->state); + return ret; } |