lib: make rcu_free() NULL-safe

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
2025-08-14 06:50:17 +00:00 · 2019-11-13 15:42:32 +01:00 · 2019-11-13 15:42:32 +01:00 · 9fe602a17c
commit 9fe602a17c
parent 420dcec358
1 changed files with 2 additions and 0 deletions
--- a/lib/frrcu.h
+++ b/lib/frrcu.h
@ -139,6 +139,8 @@ extern void rcu_enqueue(struct rcu_head *head, const struct rcu_action *action);
 #define rcu_free(mtype, ptr, field)                                            \
 	do {                                                                   \
 		typeof(ptr) _ptr = (ptr);                                      \
+		if (!_ptr)                                                     \
+			break;                                                 \
 		struct rcu_head *_rcu_head = &_ptr->field;                     \
 		static const struct rcu_action _rcu_action = {                 \
 			.type = RCUA_FREE,                                     \