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| author | Alexey Kodanev <alexey.kodanev@oracle.com> | 2018-02-05 15:10:35 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-02-05 21:21:13 -0500 |
| commit | 957d761cf91cdbb175ad7d8f5472336a4d54dbf2 (patch) | |
| tree | df4f3d6438373a5ed0a6b8e0db5f48dabdb975cd /net/sctp/ipv6.c | |
| parent | 23ddd2612d0e9b8c61d3c70960f1b1e8b64a1c4b (diff) | |
| download | linux-957d761cf91cdbb175ad7d8f5472336a4d54dbf2.tar.gz linux-957d761cf91cdbb175ad7d8f5472336a4d54dbf2.tar.bz2 linux-957d761cf91cdbb175ad7d8f5472336a4d54dbf2.zip | |
sctp: fix dst refcnt leak in sctp_v6_get_dst()
When going through the bind address list in sctp_v6_get_dst() and
the previously found address is better ('matchlen > bmatchlen'),
the code continues to the next iteration without releasing currently
held destination.
Fix it by releasing 'bdst' before continue to the next iteration, and
instead of introducing one more '!IS_ERR(bdst)' check for dst_release(),
move the already existed one right after ip6_dst_lookup_flow(), i.e. we
shouldn't proceed further if we get an error for the route lookup.
Fixes: dbc2b5e9a09e ("sctp: fix src address selection if using secondary addresses for ipv6")
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/ipv6.c')
| -rw-r--r-- | net/sctp/ipv6.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 5d4c15bf66d2..e35d4f73d2df 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -326,8 +326,10 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); bdst = ip6_dst_lookup_flow(sk, fl6, final_p); - if (!IS_ERR(bdst) && - ipv6_chk_addr(dev_net(bdst->dev), + if (IS_ERR(bdst)) + continue; + + if (ipv6_chk_addr(dev_net(bdst->dev), &laddr->a.v6.sin6_addr, bdst->dev, 1)) { if (!IS_ERR_OR_NULL(dst)) dst_release(dst); @@ -336,8 +338,10 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, } bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); - if (matchlen > bmatchlen) + if (matchlen > bmatchlen) { + dst_release(bdst); continue; + } if (!IS_ERR_OR_NULL(dst)) dst_release(dst); |