arm64: signal: nofpsimd: Handle fp/simd context for signal frames

[linux-2.6-microblaze.git] / arch / arm64 / kernel / signal.c

diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index dd2cdc0..339882d 100644 (file)
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -371,6 +371,8 @@ static int parse_user_sigframe(struct user_ctxs *user,
                        goto done;
 
                case FPSIMD_MAGIC:
+                       if (!system_supports_fpsimd())
+                               goto invalid;
                        if (user->fpsimd)
                                goto invalid;
 
@@ -506,7 +508,7 @@ static int restore_sigframe(struct pt_regs *regs,
        if (err == 0)
                err = parse_user_sigframe(&user, sf);
 
-       if (err == 0) {
+       if (err == 0 && system_supports_fpsimd()) {
                if (!user.fpsimd)
                        return -EINVAL;
 
@@ -623,7 +625,7 @@ static int setup_sigframe(struct rt_sigframe_user_layout *user,
 
        err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set));
 
-       if (err == 0) {
+       if (err == 0 && system_supports_fpsimd()) {
                struct fpsimd_context __user *fpsimd_ctx =
                        apply_user_offset(user, user->fpsimd_offset);
                err |= preserve_fpsimd_context(fpsimd_ctx);