scan-build from clang version 9 complains about following:
cache.c:106:2: warning: Dereference of null pointer
nl_list_for_each_entry_safe(obj, tmp, &cache->c_items, ce_list)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/netlink/list.h:83:20: note: expanded from macro
'nl_list_for_each_entry_safe'
pos = n, n = nl_list_entry(n->member.next, typeof(*n), member))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/netlink/list.h:60:2: note: expanded from macro 'nl_list_entry'
nl_container_of(ptr, type, member)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/netlink/list.h:56:55: note: expanded from macro 'nl_container_of'
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
^~~~~
Signed-off-by: Petr Štetiar <yn...@true.cz>
---
include/netlink/list.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/netlink/list.h b/include/netlink/list.h
index c6876a77f76c..6eae2160327a 100644
--- a/include/netlink/list.h
+++ b/include/netlink/list.h
@@ -12,6 +12,8 @@
#ifndef NETLINK_LIST_H_
#define NETLINK_LIST_H_
+#include <stddef.h>
+
struct nl_list_head
{
struct nl_list_head * next;
@@ -54,7 +56,7 @@ static inline int nl_list_empty(struct nl_list_head *head)
#define nl_container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
- (type *)( (char *)__mptr - ((size_t) &((type *)0)->member));})
+ (type *) ((char *) __mptr - (offsetof(type, member)));})
#define nl_list_entry(ptr, type, member) \
nl_container_of(ptr, type, member)
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