From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: fw@strlen.de
Subject: [PATCH nf] netfilter: nf_log: wait for rcu grace after logger unregistration
Date: Thu, 17 Sep 2015 13:51:18 +0200 [thread overview]
Message-ID: <1442490678-3535-1-git-send-email-pablo@netfilter.org> (raw)
The nf_log_unregister() function needs to call synchronize_rcu() to make sure
that the objects are not dereferenced anymore on module removal.
Fixes: 5962815a6a56 ("netfilter: nf_log: use an array of loggers instead of list")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
@Florian: I noticed this while reviewing your patch to fix the "zap all
loggers" bug.
net/netfilter/nf_log.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c
index a5ebd7d..a5d41df 100644
--- a/net/netfilter/nf_log.c
+++ b/net/netfilter/nf_log.c
@@ -117,6 +117,7 @@ void nf_log_unregister(struct nf_logger *logger)
RCU_INIT_POINTER(loggers[i][logger->type], NULL);
}
mutex_unlock(&nf_log_mutex);
+ synchronize_rcu();
}
EXPORT_SYMBOL(nf_log_unregister);
--
1.7.10.4
reply other threads:[~2015-09-17 11:44 UTC|newest]
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