| author | Su Yanjun <suyj.fnst@cn.fujitsu.com> | 2019-03-14 06:59:42 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-25 16:26:54 (GMT) |
| commit | eaa8cf570008043c6f093d7f1ec102f78b9d3c69 (patch) | |
| tree | b173d9f2e52ecbbfb780c723656adfbf828d1512 | |
| parent | 7c96721f56b02fdf7b191aee0d39690ab4f40dc5 (diff) | |
| download | common-eaa8cf570008043c6f093d7f1ec102f78b9d3c69.zip common-eaa8cf570008043c6f093d7f1ec102f78b9d3c69.tar.gz common-eaa8cf570008043c6f093d7f1ec102f78b9d3c69.tar.bz2 | |
xfrm6_tunnel: Fix potential panic when unloading xfrm6_tunnel module
[ Upstream commit 6ee02a54ef990a71bf542b6f0a4e3321de9d9c66 ]
When unloading xfrm6_tunnel module, xfrm6_tunnel_fini directly
frees the xfrm6_tunnel_spi_kmem. Maybe someone has gotten the
xfrm6_tunnel_spi, so need to wait it.
Fixes: 91cc3bb0b04ff("xfrm6_tunnel: RCU conversion")
Signed-off-by: Su Yanjun <suyj.fnst@cn.fujitsu.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/ipv6/xfrm6_tunnel.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c index 3a2701d..07b7b25 100644 --- a/net/ipv6/xfrm6_tunnel.c +++ b/net/ipv6/xfrm6_tunnel.c @@ -391,6 +391,10 @@ static void __exit xfrm6_tunnel_fini(void) xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6); xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6); unregister_pernet_subsys(&xfrm6_tunnel_net_ops); + /* Someone maybe has gotten the xfrm6_tunnel_spi. + * So need to wait it. + */ + rcu_barrier(); kmem_cache_destroy(xfrm6_tunnel_spi_kmem); } |