subashab@codeaurora.org 16186a82de ipv6: addrconf: Fix recursive spin lock call ... A rcu stall with the following backtrace was seen on a system with forwarding, optimistic_dad and use_optimistic set. To reproduce, set these flags and allow ipv6 autoconf. This occurs because the device write_lock is acquired while already holding the read_lock. Back trace below - INFO: rcu_preempt self-detected stall on CPU { 1} (t=2100 jiffies g=3992 c=3991 q=4471) <6> Task dump for CPU 1: <2> kworker/1:0 R running task 12168 15 2 0x00000002 <2> Workqueue: ipv6_addrconf addrconf_dad_work <6> Call trace: <2> [<ffffffc000084da8>] el1_irq+0x68/0xdc <2> [<ffffffc000cc4e0c>] _raw_write_lock_bh+0x20/0x30 <2> [<ffffffc000bc5dd8>] __ipv6_dev_ac_inc+0x64/0x1b4 <2> [<ffffffc000bcbd2c>] addrconf_join_anycast+0x9c/0xc4 <2> [<ffffffc000bcf9f0>] __ipv6_ifa_notify+0x160/0x29c <2> [<ffffffc000bcfb7c>] ipv6_ifa_notify+0x50/0x70 <2> [<ffffffc000bd035c>] addrconf_dad_work+0x314/0x334 <2> [<ffffffc0000b64c8>] process_one_work+0x244/0x3fc <2> [<ffffffc0000b7324>] worker_thread+0x2f8/0x418 <2> [<ffffffc0000bb40c>] kthread+0xe0/0xec v2: do addrconf_dad_kick inside read lock and then acquire write lock for ipv6_ifa_notify as suggested by Eric Fixes: 7fd2561e4e ("net: ipv6: Add a sysctl to make optimistic addresses useful candidates") Cc: Eric Dumazet <edumazet@google.com> Cc: Erik Kline <ek@google.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-02-06 03:08:15 -05:00
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6lowpan
9p	Rework and error handling fixes, primarily in the fscatch and fd transports.	2016-01-24 12:39:09 -08:00
802
8021q
appletalk
atm
ax25
batman-adv
bluetooth	Bluetooth: Fix incorrect removing of IRKs	2016-01-29 11:47:24 +01:00
bridge	switchdev: Require RTNL mutex to be held when sending FDB notifications	2016-01-28 16:21:31 -08:00
caif
can
ceph	libceph: remove outdated comment	2016-01-21 19:36:09 +01:00
core
dcb
dccp
decnet
dns_resolver
dsa
ethernet
hsr
ieee802154
ipv4	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-02-01 15:56:08 -08:00
ipv6	ipv6: addrconf: Fix recursive spin lock call	2016-02-06 03:08:15 -05:00
ipx
irda	irda: fix a potential use-after-free in ircomm_param_request	2016-01-29 22:56:46 -08:00
iucv
key
l2tp
l3mdev
lapb
llc
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-02-01 15:56:08 -08:00
mac802154
mpls
netfilter
netlabel
netlink	netlink: not trim skb for mmaped socket when dump	2016-01-29 20:25:17 -08:00
netrom
nfc
openvswitch
packet
phonet
rds	Initial roundup of 4.5 merge window patches	2016-01-23 18:45:06 -08:00
rfkill	rfkill: fix rfkill_fop_read wait_event usage	2016-01-26 11:32:05 +01:00
rose
rxrpc
sched	net_sched: drr: check for NULL pointer in drr_dequeue	2016-01-29 17:26:44 -08:00
sctp	sctp: remove the dead field of sctp_transport	2016-01-28 15:59:32 -08:00
sunrpc	Initial roundup of 4.5 merge window patches	2016-01-23 18:45:06 -08:00
switchdev	switchdev: Require RTNL mutex to be held when sending FDB notifications	2016-01-28 16:21:31 -08:00
tipc	tipc: fix connection abort during subscription cancel	2016-01-29 15:14:21 -05:00
unix	af_unix: fix struct pid memory leak	2016-01-24 22:04:49 -08:00
vmw_vsock
wimax
wireless
x25
xfrm
compat.c
Kconfig
Makefile
socket.c
sysctl_net.c