diff options
| -rw-r--r-- | arch/arm64/kernel/signal.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c index 27a1fa37f926..7810d090c025 100644 --- a/arch/arm64/kernel/signal.c +++ b/arch/arm64/kernel/signal.c @@ -435,17 +435,18 @@ static int preserve_za_context(struct za_context __user *ctx) static int restore_za_context(struct user_ctxs *user) { - int err; + int err = 0; unsigned int vq; - struct za_context za; + u16 user_vl; if (user->za_size < sizeof(*user->za)) return -EINVAL; - if (__copy_from_user(&za, user->za, sizeof(za))) - return -EFAULT; + __get_user_error(user_vl, &(user->za->vl), err); + if (err) + return err; - if (za.vl != task_get_sme_vl(current)) + if (user_vl != task_get_sme_vl(current)) return -EINVAL; if (user->za_size == sizeof(*user->za)) { @@ -453,7 +454,7 @@ static int restore_za_context(struct user_ctxs *user) return 0; } - vq = sve_vq_from_vl(za.vl); + vq = sve_vq_from_vl(user_vl); if (user->za_size < ZA_SIG_CONTEXT_SIZE(vq)) return -EINVAL; |