diff options
| author | Flavio Leitner <fleitner@redhat.com> | 2010-02-02 07:32:29 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-02 07:32:29 -0800 |
| commit | c85bb41e93184bf5494dde6d8fe5a81b564c84c8 (patch) | |
| tree | 2a5daec2aecc3fb3eedfba3f63a2156f38575b2d /include | |
| parent | 8b64056dacf6ec81986d63dff96fca039fe95f6e (diff) | |
| download | lwn-c85bb41e93184bf5494dde6d8fe5a81b564c84c8.tar.gz lwn-c85bb41e93184bf5494dde6d8fe5a81b564c84c8.zip | |
igmp: fix ip_mc_sf_allow race [v5]
Almost all igmp functions accessing inet->mc_list are protected by
rtnl_lock(), but there is one exception which is ip_mc_sf_allow(),
so there is a chance of either ip_mc_drop_socket or ip_mc_leave_group
remove an entry while ip_mc_sf_allow is running causing a crash.
Signed-off-by: Flavio Leitner <fleitner@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/igmp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/igmp.h b/include/linux/igmp.h index 724c27e5d173..93fc2449af10 100644 --- a/include/linux/igmp.h +++ b/include/linux/igmp.h @@ -153,6 +153,7 @@ extern int sysctl_igmp_max_msf; struct ip_sf_socklist { unsigned int sl_max; unsigned int sl_count; + struct rcu_head rcu; __be32 sl_addr[0]; }; @@ -170,6 +171,7 @@ struct ip_mc_socklist { struct ip_mreqn multi; unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ struct ip_sf_socklist *sflist; + struct rcu_head rcu; }; struct ip_sf_list { |