[PATCH uci 5/6] uci: silence UBSAN error by using offsetof macro from compiler
Petr Štetiar
ynezz at true.cz
Sat Oct 3 03:48:29 EDT 2020
Fixes following ubdefined-behavior as reported by clang version 10.0.0-4ubuntu1~18.04.2:
delta.c:139:52: runtime error: member access within null pointer of type 'struct uci_element'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior delta.c:139:52
Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
uci.h | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/uci.h b/uci.h
index 43f2052a00e6..b385e2be964f 100644
--- a/uci.h
+++ b/uci.h
@@ -34,6 +34,7 @@ extern "C" {
#include <setjmp.h>
#include <stdio.h>
#include <stdint.h>
+#include <stddef.h>
#define UCI_CONFDIR "/etc/config"
#define UCI_SAVEDIR "/tmp/.uci"
@@ -509,11 +510,6 @@ struct uci_parse_option {
};
-/* linked list handling */
-#ifndef offsetof
-#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
-#endif
-
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
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