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Commit 8dafc993 authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso Committed by Sasha Levin
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netfilter: nf_log: wait for rcu grace after logger unregistration 



[ Upstream commit ad5001cc7cdf9aaee5eb213fdee657e4a3c94776 ]

The nf_log_unregister() function needs to call synchronize_rcu() to make sure
that the objects are not dereferenced anymore on module removal.

Fixes: 5962815a ("netfilter: nf_log: use an array of loggers instead of list")
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent ba1fa01d

net/netfilter/nf_log.c

+1 −0
Original line number Diff line number Diff line
@@ -103,6 +103,7 @@ void nf_log_unregister(struct nf_logger *logger) 
	for (i = 0; i < NFPROTO_NUMPROTO; i++)

		RCU_INIT_POINTER(loggers[i][logger->type], NULL);

	mutex_unlock(&nf_log_mutex);

	synchronize_rcu();

}

EXPORT_SYMBOL(nf_log_unregister);