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Jesper Nilsson 71f6f6dfdf ipv6: Plug sk_buff leak in ipv6_rcv (net/ipv6/ip6_input.c) 
Commit 778d80be52
(ipv6: Add disable_ipv6 sysctl to disable IPv6 operaion on specific interface)
seems to have introduced a leak of sk_buff's for ipv6 traffic,
at least in some configurations where idev is NULL, or when ipv6
is disabled via sysctl.

The problem is that if the first condition of the if-statement
returns non-NULL, it returns an skb with only one reference,
and when the other conditions apply, execution jumps to the "out"
label, which does not call kfree_skb for it.

To plug this leak, change to use the "drop" label instead.
(this relies on it being ok to call kfree_skb on NULL)
This also allows us to avoid calling rcu_read_unlock here,
and removes the only user of the "out" label.

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2009-03-27 00:17:45 -07:00
..
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2009-03-26 22:45:23 -07:00
Kconfig ipsec: ipcomp - Merge IPComp implementations 2008-07-25 02:54:40 -07:00
Makefile [IPV6] MROUTE: Support multicast forwarding. 2008-04-05 22:33:38 +09:00
addrconf.c ipv6: Fix conflict resolutions during ipv6 binding 2009-03-24 19:49:11 -07:00
addrconf_core.c [IPV6]: ipv6_addr_type() doesn't know about RFC4193 addresses. 2007-07-31 02:28:21 -07:00
addrlabel.c net: replace %p6 with %pI6 2008-10-29 12:52:50 -07:00
af_inet6.c ipv6: Make v4-mapped bindings consistent with IPv4 2009-03-24 19:49:10 -07:00
ah6.c netns xfrm: AH/ESP in netns! 2008-11-25 17:59:27 -08:00
anycast.c net: replace %#p6 format specifier with %pi6 2008-10-29 12:50:24 -07:00
datagram.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
esp6.c netns xfrm: AH/ESP in netns! 2008-11-25 17:59:27 -08:00
exthdrs.c net: replace %p6 with %pI6 2008-10-29 12:52:50 -07:00
exthdrs_core.c [NET] IPV6: Fix whitespace errors. 2007-02-10 23:19:42 -08:00
fib6_rules.c netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
icmp.c net: fix xfrm reverse flow lookup for icmp6 2009-01-27 22:30:19 -08:00
inet6_connection_sock.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
inet6_hashtables.c ipv6: don't use tw net when accounting for recycled tw 2009-02-26 03:35:13 -08:00
ip6_fib.c ipv6: Fix fib6_dump_table walker leak 2009-01-13 22:17:51 -08:00
ip6_flowlabel.c ipv6: Disallow rediculious flowlabel option sizes. 2009-02-06 00:49:55 -08:00
ip6_input.c ipv6: Plug sk_buff leak in ipv6_rcv (net/ipv6/ip6_input.c) 2009-03-27 00:17:45 -07:00
ip6_output.c ipv6: Copy cork options in ip6_append_data 2009-02-05 15:15:50 -08:00
ip6_tunnel.c IPv6: fix to set device name when new IPv6 over IPv6 tunnel device is created. 2009-02-09 15:01:19 -08:00
ip6mr.c ipv6: compile fix for ip6mr.c 2009-01-31 00:51:49 -08:00
ipcomp6.c netns xfrm: state lookup in netns 2008-11-25 17:30:50 -08:00
ipv6_sockglue.c ipv6: Remove some pointless conditionals before kfree_skb() 2009-02-24 23:33:52 -08:00
mcast.c ipv6/mcast: join error paths using goto 2008-12-14 23:15:21 -08:00
mip6.c netns xfrm: KM reporting in netns 2008-11-25 17:51:01 -08:00
ndisc.c netlink: change nlmsg_notify() return value logic 2009-02-24 23:18:28 -08:00
netfilter.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2008-11-28 02:19:15 -08:00
proc.c net: fix tiny output corruption of /proc/net/snmp6 2008-11-20 04:20:10 -08:00
protocol.c net: remove CVS keywords 2008-06-11 21:00:38 -07:00
raw.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
reassembly.c netns: oops in ip[6]_frag_reasm incrementing stats 2009-03-18 23:26:11 -07:00
route.c netlink: change nlmsg_notify() return value logic 2009-02-24 23:18:28 -08:00
sit.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-03-20 02:27:41 -07:00
syncookies.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
sysctl_net_ipv6.c remove lots of double-semicolons 2009-01-08 08:31:14 -08:00
tcp_ipv6.c ipv6: Remove some pointless conditionals before kfree_skb() 2009-02-24 23:33:52 -08:00
tunnel6.c [IPV6] TUNNEL6: Fix incoming packet length check for inter-protocol tunnel. 2008-06-05 04:02:32 +09:00
udp.c ipv6: Fix conflict resolutions during ipv6 binding 2009-03-24 19:49:11 -07:00
udp_impl.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
udplite.c udp: RCU handling for Unicast packets. 2008-10-29 02:11:14 -07:00
xfrm6_input.c netns xfrm: per-netns MIBs 2008-11-25 17:59:52 -08:00
xfrm6_mode_beet.c ipsec: Interfamily IPSec BEET, ipv4-inner ipv6-outer 2008-08-06 02:40:25 -07:00
xfrm6_mode_ro.c [IPSEC]: Make x->lastused an unsigned long 2008-01-28 14:53:52 -08:00
xfrm6_mode_transport.c [IPSEC]: Use IPv6 calling convention as the convention for x->mode->output 2007-10-10 16:55:54 -07:00
xfrm6_mode_tunnel.c [IPSEC]: Fix inter address family IPsec tunnel handling. 2008-03-24 14:51:51 -07:00
xfrm6_output.c [IPSEC]: Fix inter address family IPsec tunnel handling. 2008-03-24 14:51:51 -07:00
xfrm6_policy.c net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
xfrm6_state.c ipv6: fix sparse warning: Using plain integer as NULL pointer 2009-02-21 23:37:10 -08:00
xfrm6_tunnel.c xfrm6_tunnel: join error paths using goto 2008-12-14 23:13:48 -08:00