signal: Ensure no siginfo union member increases the size of struct siginfo

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

diff --git a/kernel/signal.c b/kernel/signal.c
index 241d54958bbbcef16dcbb78b1a96ebd33c75694c..b9e5d825ee46265a7562b1ffb2f4b029f2b3290e 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3688,6 +3688,7 @@ void __init signals_init(void)
        /* If this check fails, the __ARCH_SI_PREAMBLE_SIZE value is wrong! */
        BUILD_BUG_ON(__ARCH_SI_PREAMBLE_SIZE
                != offsetof(struct siginfo, _sifields._pad));
+       BUILD_BUG_ON(sizeof(struct siginfo) != SI_MAX_SIZE);
 
        sigqueue_cachep = KMEM_CACHE(sigqueue, SLAB_PANIC);
 }