Searched hist:"592 fcb9dfafaa02dd0edc207bf5d3a0ee7a1f8df" (Results 1 – 2 of 2) sorted by relevance
| /linux/net/ipv4/ |
| H A D | ip_sockglue.c | diff 592fcb9dfafaa02dd0edc207bf5d3a0ee7a1f8df Wed Jun 09 18:21:07 CEST 2010 Eric Dumazet <eric.dumazet@gmail.com> ip: ip_ra_control() rcu fix
commit 66018506e15b (ip: Router Alert RCU conversion) introduced RCU
lookups to ip_call_ra_chain(). It missed proper deinit phase :
When ip_ra_control() deletes an ip_ra_chain, it should make sure
ip_call_ra_chain() users can not start to use socket during the rcu
grace period. It should also delay the sock_put() after the grace
period, or we risk a premature socket freeing and corruptions, as
raw sockets are not rcu protected yet.
This delay avoids using expensive atomic_inc_not_zero() in
ip_call_ra_chain().
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| /linux/include/net/ |
| H A D | ip.h | diff 592fcb9dfafaa02dd0edc207bf5d3a0ee7a1f8df Wed Jun 09 18:21:07 CEST 2010 Eric Dumazet <eric.dumazet@gmail.com> ip: ip_ra_control() rcu fix
commit 66018506e15b (ip: Router Alert RCU conversion) introduced RCU
lookups to ip_call_ra_chain(). It missed proper deinit phase :
When ip_ra_control() deletes an ip_ra_chain, it should make sure
ip_call_ra_chain() users can not start to use socket during the rcu
grace period. It should also delay the sock_put() after the grace
period, or we risk a premature socket freeing and corruptions, as
raw sockets are not rcu protected yet.
This delay avoids using expensive atomic_inc_not_zero() in
ip_call_ra_chain().
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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