diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2025-01-29 19:15:18 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-13 12:47:45 +0100 |
| commit | cb9950eaaf9cc76dfe490c06aa11f185b3c7f22b (patch) | |
| tree | cc197a277d6ddcd8c1b03ae9f303d43c9b4f28fe | |
| parent | 90d2c9352a04027bfd8e3b4b09eb14aaec033a3b (diff) | |
net: ipv6: fix dst refleaks in rpl, seg6 and ioam6 lwtunnels
commit c71a192976ded2f2f416d03c4f595cdd4478b825 upstream.
dst_cache_get() gives us a reference, we need to release it.
Discovered by the ioam6.sh test, kmemleak was recently fixed
to catch per-cpu memory leaks.
Fixes: 985ec6f5e623 ("net: ipv6: rpl_iptunnel: mitigate 2-realloc issue")
Fixes: 40475b63761a ("net: ipv6: seg6_iptunnel: mitigate 2-realloc issue")
Fixes: dce525185bc9 ("net: ipv6: ioam6_iptunnel: mitigate 2-realloc issue")
Reviewed-by: Justin Iurman <justin.iurman@uliege.be>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250130031519.2716843-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv6/rpl_iptunnel.c | 6 | ||||
| -rw-r--r-- | net/ipv6/seg6_iptunnel.c | 2 |
2 files changed, 5 insertions, 3 deletions
diff --git a/net/ipv6/rpl_iptunnel.c b/net/ipv6/rpl_iptunnel.c index 95e84ec03520..5d47948c0364 100644 --- a/net/ipv6/rpl_iptunnel.c +++ b/net/ipv6/rpl_iptunnel.c @@ -232,7 +232,6 @@ static int rpl_output(struct net *net, struct sock *sk, struct sk_buff *skb) dst = ip6_route_output(net, NULL, &fl6); if (dst->error) { err = dst->error; - dst_release(dst); goto drop; } @@ -251,6 +250,7 @@ static int rpl_output(struct net *net, struct sock *sk, struct sk_buff *skb) return dst_output(net, sk, skb); drop: + dst_release(dst); kfree_skb(skb); return err; } @@ -277,8 +277,10 @@ static int rpl_input(struct sk_buff *skb) local_bh_enable(); err = rpl_do_srh(skb, rlwt, dst); - if (unlikely(err)) + if (unlikely(err)) { + dst_release(dst); goto drop; + } skb_dst_drop(skb); diff --git a/net/ipv6/seg6_iptunnel.c b/net/ipv6/seg6_iptunnel.c index a73840da34ed..986459a85fbd 100644 --- a/net/ipv6/seg6_iptunnel.c +++ b/net/ipv6/seg6_iptunnel.c @@ -380,7 +380,6 @@ static int seg6_output(struct net *net, struct sock *sk, struct sk_buff *skb) dst = ip6_route_output(net, NULL, &fl6); if (dst->error) { err = dst->error; - dst_release(dst); goto drop; } @@ -398,6 +397,7 @@ static int seg6_output(struct net *net, struct sock *sk, struct sk_buff *skb) return dst_output(net, sk, skb); drop: + dst_release(dst); kfree_skb(skb); return err; } |