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| author | Eric Dumazet <edumazet@google.com> | 2021-12-01 18:26:35 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-08 09:01:12 +0100 |
| commit | 01c60b3f477bf85d882d73de4e33cc8637c695a9 (patch) | |
| tree | d5dfadcef45cd153d15b9ec679fe6a9c40eaa455 /include/net | |
| parent | efb07398175647f17f7b69376c8a9bc5706bf9b0 (diff) | |
| download | linux-stable-01c60b3f477bf85d882d73de4e33cc8637c695a9.tar.gz linux-stable-01c60b3f477bf85d882d73de4e33cc8637c695a9.tar.bz2 linux-stable-01c60b3f477bf85d882d73de4e33cc8637c695a9.zip | |
ipv4: convert fib_num_tclassid_users to atomic_t
commit 213f5f8f31f10aa1e83187ae20fb7fa4e626b724 upstream.
Before commit faa041a40b9f ("ipv4: Create cleanup helper for fib_nh")
changes to net->ipv4.fib_num_tclassid_users were protected by RTNL.
After the change, this is no longer the case, as free_fib_info_rcu()
runs after rcu grace period, without rtnl being held.
Fixes: faa041a40b9f ("ipv4: Create cleanup helper for fib_nh")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Ahern <dsahern@kernel.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/ip_fib.h | 2 | ||||
| -rw-r--r-- | include/net/netns/ipv4.h | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h index cb6c12562899..3bf9ecb6b0d3 100644 --- a/include/net/ip_fib.h +++ b/include/net/ip_fib.h @@ -412,7 +412,7 @@ int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, #ifdef CONFIG_IP_ROUTE_CLASSID static inline int fib_num_tclassid_users(struct net *net) { - return net->ipv4.fib_num_tclassid_users; + return atomic_read(&net->ipv4.fib_num_tclassid_users); } #else static inline int fib_num_tclassid_users(struct net *net) diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index c0c0791b1912..da171544a33c 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -61,7 +61,7 @@ struct netns_ipv4 { #endif bool fib_has_custom_local_routes; #ifdef CONFIG_IP_ROUTE_CLASSID - int fib_num_tclassid_users; + atomic_t fib_num_tclassid_users; #endif struct hlist_head *fib_table_hash; bool fib_offload_disabled; |