From 787e0617e5176176c494a787f1b0a5248a3db568 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Wed, 27 Sep 2006 16:36:23 -0700 Subject: [PATCH] [NET_SCHED]: HTB: fix incorrect use of RB_EMPTY_NODE Fix incorrect use of RB_EMPTY_NODE in htb_safe_rb_erase, which makes it skip nodes within the rbtree instead of nodes not in the tree, resulting in crashes later on. The root cause for this seems to be the very counter-intuitive behaviour of the RB_EMPTY_NODE macro, which returns _false_ when the node is empty. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/sched/sch_htb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c index bb3ddd4784b..6c058e3660c 100644 --- a/net/sched/sch_htb.c +++ b/net/sched/sch_htb.c @@ -391,7 +391,7 @@ static inline void htb_add_class_to_row(struct htb_sched *q, /* If this triggers, it is a bug in this code, but it need not be fatal */ static void htb_safe_rb_erase(struct rb_node *rb, struct rb_root *root) { - if (RB_EMPTY_NODE(rb)) { + if (!RB_EMPTY_NODE(rb)) { WARN_ON(1); } else { rb_erase(rb, root); -- 2.20.1