coredump: fix kabi broken in struct coredump_params

Offering: HULK
hulk inclusion
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6KT9C
CVE: CVE-2023-1249

--------------------------------

The coredump_params structure is only used as parameters for function
pointer members of some structures, such as linux_binfmt, spufs_calls,
etc., and the parameters are of pointer type, so adding members of
coredump_params will not affect the memory layout.

Also coredump_params is used to hold coredump parameters to be passed to
coredump functions of different types of binfmt, the driver will not use
the structure.
Signed-off-by: NLi Huafei <lihuafei1@huawei.com>
Reviewed-by: NXu Kuohai <xukuohai@huawei.com>
Reviewed-by: NXiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

include/linux/binfmts.h

@@ -82,9 +82,9 @@ struct coredump_params {
 	unsigned long mm_flags;
 	loff_t written;
 	loff_t pos;
-	int vma_count;
-	size_t vma_data_size;
-	struct core_vma_metadata *vma_meta;
+	KABI_EXTEND(int vma_count)
+	KABI_EXTEND(size_t vma_data_size)
+	KABI_EXTEND(struct core_vma_metadata *vma_meta)
 };
 
 /*