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| author |   Eric Dumazet <edumazet@google.com> | 2019-05-27 16:56:48 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-05-28 17:22:15 -0700 |
| commit | ae7352d384a552d8c799c242e74a934809990a71 (patch) | |
| tree | 9e0f7e4476b524263e403ff8be2acb6a9746cddb | |
| parent | inet: frags: uninline fqdir_init() (diff) | |
| download | linux-dev-ae7352d384a552d8c799c242e74a934809990a71.tar.xz linux-dev-ae7352d384a552d8c799c242e74a934809990a71.zip | |
inet: frags: call inet_frags_fini() after unregister_pernet_subsys()
Both IPv6 and 6lowpan are calling inet_frags_fini() too soon.
inet_frags_fini() is dismantling a kmem_cache, that might be needed
later when unregister_pernet_subsys() eventually has to remove
frags queues from hash tables and free them.
This fixes potential use-after-free, and is a prereq for the following patch.
Fixes: d4ad4d22e7ac ("inet: frags: use kmem_cache for inet_frag_queue")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ieee802154/6lowpan/reassembly.c | 2 | ||||
| -rw-r--r-- | net/ipv6/reassembly.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c index e59c3b708969..5b56f16ed86b 100644 --- a/net/ieee802154/6lowpan/reassembly.c +++ b/net/ieee802154/6lowpan/reassembly.c @@ -540,7 +540,7 @@ err_sysctl: void lowpan_net_frag_exit(void) { - inet_frags_fini(&lowpan_frags); lowpan_frags_sysctl_unregister(); unregister_pernet_subsys(&lowpan_frags_ops); + inet_frags_fini(&lowpan_frags); } diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index 836ea964cf14..ff5b6d8de2c6 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -583,8 +583,8 @@ err_protocol: void ipv6_frag_exit(void) { - inet_frags_fini(&ip6_frags); ip6_frags_sysctl_unregister(); unregister_pernet_subsys(&ip6_frags_ops); inet6_del_protocol(&frag_protocol, IPPROTO_FRAGMENT); + inet_frags_fini(&ip6_frags); } |