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authorThomas Graf <tgraf@suug.ch>2012-06-15 03:00:17 +0400
committerDavid S. Miller <davem@davemloft.net>2012-06-16 02:30:15 +0400
commit2a0c451ade8e1783c5d453948289e4a978d417c9 (patch)
tree136dbbaf024f45200848ec371368668872545a2e /include
parent0f6efff92524c65fc3ef41c8b936c526580f1db0 (diff)
downloadlinux-2a0c451ade8e1783c5d453948289e4a978d417c9.tar.xz
ipv6: Prevent access to uninitialized fib_table_hash via /proc/net/ipv6_route
/proc/net/ipv6_route reflects the contents of fib_table_hash. The proc handler is installed in ip6_route_net_init() whereas fib_table_hash is allocated in fib6_net_init() _after_ the proc handler has been installed. This opens up a short time frame to access fib_table_hash with its pants down. fib6_init() as a whole can't be moved to an earlier position as it also registers the rtnetlink message handlers which should be registered at the end. Therefore split it into fib6_init() which is run early and fib6_init_late() to register the rtnetlink message handlers. Signed-off-by: Thomas Graf <tgraf@suug.ch> Reviewed-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/ip6_fib.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 0ae759a6c76e..209af13b0336 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -271,6 +271,8 @@ extern void fib6_run_gc(unsigned long expires,
extern void fib6_gc_cleanup(void);
extern int fib6_init(void);
+extern int fib6_init_late(void);
+extern void fib6_cleanup_late(void);
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
extern int fib6_rules_init(void);