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netfilter: nf_log: wait for rcu grace after logger unregistration

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commit ad5001cc7c upstream.

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

Fixes: 5962815a6a ("netfilter: nf_log: use an array of loggers instead of list")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pablo Neira Ayuso
2015-09-17 13:37:00 +02:00
committed by Greg Kroah-Hartman
parent a251cb2078
commit cc2cc007bc
1 changed files with 1 additions and 0 deletions
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net/netfilter/nf_log.c
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@@ -113,6 +113,7 @@ 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);