linux-kernel - [PATCH -tip 1/5] kprobes: Remove meaningless BUG

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Date:   Tue, 21 Aug 2018 18:38:05 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Ingo Molnar <mingo@...hat.com>
Cc:     "Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
        "David S . Miller" <davem@...emloft.net>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH -tip 1/5] kprobes: Remove meaningless BUG_ON from disarming process

All aggr_probe at this line are already disarmed by
disable_kprobe() or checked by kprobe_disarmed().
So this BUG_ON() does meaningless check. Remove it.

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
---
 kernel/kprobes.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index ab257be4d924..d1edd8d5641e 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1704,7 +1704,6 @@ static int __unregister_kprobe_top(struct kprobe *p)
 	return 0;
 
 disarmed:
-	BUG_ON(!kprobe_disarmed(ap));
 	hlist_del_rcu(&ap->hlist);
 	return 0;
 }