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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
..
9p 9p: fix sparse warning: cast adds address space 2009-02-26 23:13:32 -08:00
802 snap: use const for descriptor 2009-03-21 19:06:50 -07:00
8021q gro: Fix vlan/netpoll check again 2009-03-17 13:10:52 -07:00
appletalk net: convert usage of packet_type to read_mostly 2009-03-10 05:22:43 -07:00
atm atm: convert clip driver to net_device_ops 2009-03-21 19:19:12 -07:00
ax25 ax25: zero length frame filtering in AX25 2009-03-21 13:33:55 -07:00
bluetooth Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
bridge Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-03-26 01:22:01 -07:00
can can: remove some pointless conditionals before kfree_skb() 2009-02-26 23:07:35 -08:00
core GRO: Disable GRO on legacy netif_rx path 2009-03-26 22:24:28 -07:00
dcb DCB: fix kfree(skb) 2009-01-04 17:29:21 -08:00
dccp dccp: Do not let initial option overhead shrink the MPS 2009-03-02 03:07:23 -08:00
decnet net/*: use linux/kernel.h swap() 2009-03-21 13:36:17 -07:00
dsa dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
econet net: convert usage of packet_type to read_mostly 2009-03-10 05:22:43 -07:00
ethernet
ipv4 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
ipv6 ipv6: Plug sk_buff leak in ipv6_rcv (net/ipv6/ip6_input.c) 2009-03-27 00:17:45 -07:00
ipx ipx: use constant for strings and desciptor 2009-03-21 19:06:51 -07:00
irda irlan: convert to net_device_ops 2009-03-21 19:19:16 -07:00
iucv iucv: remove some pointless conditionals before kfree_skb() 2009-02-26 23:07:37 -08:00
key af_key: remove some pointless conditionals before kfree_skb() 2009-02-26 23:07:32 -08:00
lapb
llc net: convert usage of packet_type to read_mostly 2009-03-10 05:22:43 -07:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 2009-03-17 15:04:31 -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
netlabel netlabel: Update kernel configuration API 2008-12-31 12:54:11 -05:00
netlink Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
netrom netrom: zero length frame filtering in NetRom 2009-03-21 13:34:20 -07:00
packet Network Drop Monitor: Adding kfree_skb_clean for non-drops and modifying end-of-line points for skbs 2009-03-13 12:09:28 -07:00
phonet net: convert usage of packet_type to read_mostly 2009-03-10 05:22:43 -07:00
rds rds: fix iband RDMA dependencies 2009-03-03 21:39:40 -08:00
rfkill net/rfkill/rfkill.c: fix unused rfkill_led_trigger() warning 2009-01-04 17:11:24 -08:00
rose rose: convert to network_device_ops 2009-01-21 14:02:04 -08:00
rxrpc RxRPC: Fix a potential NULL dereference 2009-02-06 21:50:52 -08:00
sched net/*: use linux/kernel.h swap() 2009-03-21 13:36:17 -07:00
sctp sctp: Clean up TEST_FRAME hacks. 2009-03-21 13:41:09 -07:00
sunrpc Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
tipc tipc: fix non-const printf format arguments 2009-03-18 19:11:29 -07:00
unix unix: remove some pointless conditionals before kfree_skb() 2009-02-26 23:07:34 -08:00
wanrouter wanrouter: fix sparse warnings: context imbalance 2009-02-26 23:13:36 -08:00
wimax Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-02-14 23:12:00 -08:00
wireless Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-03-23 13:35:04 -07:00
x25 x25: '< 0' and '>= 0' test on unsigned 2009-03-13 16:04:12 -07:00
xfrm xfrm: Fix xfrm_state_find() wrt. wildcard source address. 2009-03-13 14:22:40 -07:00
compat.c net: socket infrastructure for SO_TIMESTAMPING 2009-02-15 22:43:35 -08:00
Kconfig Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
Makefile RDS: Kconfig and Makefile 2009-02-26 23:43:35 -08:00
nonet.c
socket.c Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6 2009-03-26 16:14:02 -07:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00
TUNABLE