[PATCH] uts: Don't randomize "struct uts_namespace".

[Tetsuo Handa]

I noticed that makedumpfile utility is failing to check kernel version, for
it depends on offset of "struct uts_namespace"->name being sizeof(int).

----------
int
check_release(void)
{
        unsigned long utsname;

        /*
         * Get the kernel version.
         */
        if (SYMBOL(system_utsname) != NOT_FOUND_SYMBOL) {
                utsname = SYMBOL(system_utsname);
        } else if (SYMBOL(init_uts_ns) != NOT_FOUND_SYMBOL) {
                utsname = SYMBOL(init_uts_ns) + sizeof(int);
        } else {
                ERRMSG("Can't get the symbol of system_utsname.\n");
                return FALSE;
        }
        if (!readmem(VADDR, utsname, &info->system_utsname,
                                        sizeof(struct utsname))) {
                ERRMSG("Can't get the address of system_utsname.\n");
                return FALSE;
        }
----------

Since there is no way to tell the offset to userspace, let's not randomize
"struct uts_namespace".

Signed-off-by: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp>
Fixes: 3859a271a003aba0 ("randstruct: Mark various structs for randomization")
Cc: stable <sta...@vger.kernel.org> # v4.13+
---
 include/linux/utsname.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index 44429d9..85c206f 100644
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.h
@@ -27,7 +27,7 @@ struct uts_namespace {
        struct user_namespace *user_ns;
        struct ucounts *ucounts;
        struct ns_common ns;
-} __randomize_layout;
+};
 extern struct uts_namespace init_uts_ns;
 
 #ifdef CONFIG_UTS_NS
-- 
1.8.3.1