linux-user/aarch64: Verify extra record lock succeeded

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-39-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/linux-user/aarch64/signal.c b/linux-user/aarch64/signal.c
index 8fbe98d72f2361e96ca58b76d63d304e9f1ddf6b..9ff79da4be0b92fa95ead3e50142fb69c5c20b30 100644 (file)
--- a/linux-user/aarch64/signal.c
+++ b/linux-user/aarch64/signal.c
@@ -340,6 +340,9 @@ static int target_restore_sigframe(CPUARMState *env,
             __get_user(extra_size,
                        &((struct target_extra_context *)ctx)->size);
             extra = lock_user(VERIFY_READ, extra_datap, extra_size, 0);
+            if (!extra) {
+                return 1;
+            }
             break;
 
         default: