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linux/net/ieee802154
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Eric Dumazet 1d6119baf0 net: fix percpu memory leaks 
This patch fixes following problems :

1) percpu_counter_init() can return an error, therefore
  init_frag_mem_limit() must propagate this error so that
  inet_frags_init_net() can do the same up to its callers.

2) If ip[46]_frags_ns_ctl_register() fail, we must unwind
   properly and free the percpu_counter.

Without this fix, we leave freed object in percpu_counters
global list (if CONFIG_HOTPLUG_CPU) leading to crashes.

This bug was detected by KASAN and syzkaller tool
(http://github.com/google/syzkaller)

Fixes: 6d7b857d54 ("net: use lib/percpu_counter API for fragmentation mem accounting")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-02 22:47:14 -05:00
..
6lowpan net: fix percpu memory leaks 2015-11-02 22:47:14 -05:00
core.c nl802154: add support for security layer 2015-09-30 13:16:44 +02:00
core.h nl802154: add support for security layer 2015-09-30 13:16:44 +02:00
header_ops.c ieee802154: change needed headroom/tailroom 2015-09-22 11:51:20 +02:00
ieee802154.h ieee802154: add nl802154 framework 2014-11-09 19:50:29 +01:00
Kconfig nl802154: add support for security layer 2015-09-30 13:16:44 +02:00
Makefile ieee802154: Add trace events for rdev->ops 2015-04-30 18:48:09 +02:00
netlink.c netlink: make nlmsg_end() and genlmsg_end() void 2015-01-18 01:03:45 -05:00
nl802154.c nl802154: Missing return in nl802154_add_llsec_key() 2015-10-02 23:34:37 +02:00
nl802154.h ieee802154: add nl802154 framework 2014-11-09 19:50:29 +01:00
nl_policy.c ieee802154: mac802154: remove FSF address 2014-10-25 08:07:30 +02:00
nl-mac.c ieee802154: Remove 802.15.4/6LoWPAN checks for interface MTU. 2015-05-26 20:26:09 +02:00
nl-phy.c mac802154: remove pib lock 2015-05-23 17:57:08 +02:00
rdev-ops.h nl802154: add support for security layer 2015-09-30 13:16:44 +02:00
socket.c ieee802154: change mtu size behaviour 2015-09-30 13:21:32 +02:00
sysfs.c cfg802154: add PM hooks 2015-07-23 17:10:49 +02:00
sysfs.h ieee802154: introduce sysfs file 2014-10-28 23:19:09 +01:00
trace.c ieee802154: Add trace events for rdev->ops 2015-04-30 18:48:09 +02:00
trace.h ieee802154: add ack request default handling 2015-08-10 20:43:06 +02:00