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| author | Patrick McHardy <kaber@trash.net> | 2006-08-21 15:31:08 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-08-22 14:33:56 -0700 |
| commit | e0b7cde9975e17a61b4511c7822803dfb7210011 (patch) | |
| tree | df2f6669f5016fb3e9c8d089b0c6c850b6bc8a3e /net | |
| parent | 2d8f613160ed303f5fe310f21bba334a4b074fa5 (diff) | |
| download | linux-3.10-e0b7cde9975e17a61b4511c7822803dfb7210011.tar.gz linux-3.10-e0b7cde9975e17a61b4511c7822803dfb7210011.tar.bz2 linux-3.10-e0b7cde9975e17a61b4511c7822803dfb7210011.zip | |
[NETFILTER]: arp_tables: fix table locking in arpt_do_table
table->private might change because of ruleset changes, don't use it
without holding the lock.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/netfilter/arp_tables.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c index df4854cf598..8d1d7a6e72a 100644 --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -236,7 +236,7 @@ unsigned int arpt_do_table(struct sk_buff **pskb, struct arpt_entry *e, *back; const char *indev, *outdev; void *table_base; - struct xt_table_info *private = table->private; + struct xt_table_info *private; /* ARP header, plus 2 device addresses, plus 2 IP addresses. */ if (!pskb_may_pull((*pskb), (sizeof(struct arphdr) + @@ -248,6 +248,7 @@ unsigned int arpt_do_table(struct sk_buff **pskb, outdev = out ? out->name : nulldevname; read_lock_bh(&table->lock); + private = table->private; table_base = (void *)private->entries[smp_processor_id()]; e = get_entry(table_base, private->hook_entry[hook]); back = get_entry(table_base, private->underflow[hook]); |