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| author | Su Yanjun <suyj.fnst@cn.fujitsu.com> | 2019-03-14 14:59:42 +0800 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2019-03-15 11:11:42 +0100 |
| commit | 6ee02a54ef990a71bf542b6f0a4e3321de9d9c66 (patch) | |
| tree | 37debb665cc4dfa7761e7bf12597b82e512cb28c /net | |
| parent | f10e0010fae8174dc20bdc872bcaa85baa925cb7 (diff) | |
| download | linux-6ee02a54ef990a71bf542b6f0a4e3321de9d9c66.tar.gz linux-6ee02a54ef990a71bf542b6f0a4e3321de9d9c66.tar.bz2 linux-6ee02a54ef990a71bf542b6f0a4e3321de9d9c66.zip | |
xfrm6_tunnel: Fix potential panic when unloading xfrm6_tunnel module
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>
Diffstat (limited to 'net')
| -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 bc65db782bfb..12cb3aa990af 100644 --- a/net/ipv6/xfrm6_tunnel.c +++ b/net/ipv6/xfrm6_tunnel.c @@ -402,6 +402,10 @@ 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); } |