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linux-stable/net/core
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Eric Dumazet f932780319 net: fix uninit-value in __hw_addr_add_ex() 
commit 77d36398d9 upstream.

syzbot complained :

BUG: KMSAN: uninit-value in memcmp+0x119/0x180 lib/string.c:861
CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.16.0+ #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676
 memcmp+0x119/0x180 lib/string.c:861
 __hw_addr_add_ex net/core/dev_addr_lists.c:60 [inline]
 __dev_mc_add+0x1c2/0x8e0 net/core/dev_addr_lists.c:670
 dev_mc_add+0x6d/0x80 net/core/dev_addr_lists.c:687
 igmp6_group_added+0x2db/0xa00 net/ipv6/mcast.c:662
 ipv6_dev_mc_inc+0xe9e/0x1130 net/ipv6/mcast.c:914
 addrconf_join_solict net/ipv6/addrconf.c:2078 [inline]
 addrconf_dad_begin net/ipv6/addrconf.c:3828 [inline]
 addrconf_dad_work+0x427/0x2150 net/ipv6/addrconf.c:3954
 process_one_work+0x12c6/0x1f60 kernel/workqueue.c:2113
 worker_thread+0x113c/0x24f0 kernel/workqueue.c:2247
 kthread+0x539/0x720 kernel/kthread.c:239

Fixes: f001fde5ea ("net: introduce a list of device addresses dev_addr_list (v6)")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-16 10:10:23 +02:00
..
datagram.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dev.c vlan: Fix reading memory beyond skb->tail in skb_vlan_tagged_multi 2018-04-29 11:33:12 +02:00
dev_addr_lists.c net: fix uninit-value in __hw_addr_add_ex() 2018-05-16 10:10:23 +02:00
dev_ioctl.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
devlink.c devlink: Remove redundant free on error path 2018-03-31 18:10:39 +02:00
drop_monitor.c drop_monitor: use setup_timer 2017-03-12 23:47:16 -07:00
dst.c net: check type when freeing metadata dst 2017-08-21 10:57:38 -07:00
dst_cache.c net: dst_cache_per_cpu_dst_set() can be static 2016-03-18 17:45:08 -04:00
ethtool.c ethtool: do not print warning for applications using legacy API 2018-01-17 09:45:22 +01:00
fib_notifier.c net: Add module reference to FIB notifiers 2017-09-01 20:33:42 -07:00
fib_rules.c rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
filter.c bpf: fix 32-bit divide by zero 2018-01-31 14:03:50 +01:00
flow_dissector.c flow_dissector: properly cap thoff field 2018-01-31 14:03:47 +01:00
gen_estimator.c net_sched: gen_estimator: fix broken estimators based on percpu stats 2018-03-08 22:41:13 -08:00
gen_stats.c net_sched: gen_estimator: complete rewrite of rate estimators 2016-12-05 15:21:59 -05:00
gro_cells.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hwbm.c net: hwbm: Fix unbalanced spinlock in error case 2016-05-25 12:35:09 -07:00
link_watch.c
lwt_bpf.c net: add extack arg to lwtunnel build state 2017-05-30 11:55:32 -04:00
lwtunnel.c ipv6: sr: define core operations for seg6local lightweight tunnel 2017-08-07 14:16:22 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
neighbour.c net: fix deadlock while clearing neighbor proxy table 2018-04-29 11:33:11 +02:00
net-procfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
net-sysfs.c net: style cleanups 2017-08-18 22:38:47 -07:00
net-sysfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
net-traces.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
net_namespace.c net: Fix double free and memory corruption in get_net_ns_by_id() 2018-01-02 20:31:09 +01:00
netclassid_cgroup.c cgroup: add @flags to css_task_iter_start() and implement CSS_TASK_ITER_PROCS 2017-07-21 11:14:51 -04:00
netevent.c
netpoll.c netpoll: Fix device name check in netpoll_setup() 2017-07-26 17:01:43 -07:00
netprio_cgroup.c net: break include loop netdevice.h, dsa.h, devlink.h 2017-03-28 22:46:04 -07:00
pktgen.c net: convert sk_buff.users from atomic_t to refcount_t 2017-07-01 07:39:07 -07:00
ptp_classifier.c
request_sock.c ipv4: Namespaceify tcp_max_syn_backlog knob 2016-12-29 11:38:31 -05:00
rtnetlink.c net: enable interface alias removal via rtnl 2017-10-16 20:52:43 +01:00
scm.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/user.h> 2017-03-02 08:42:29 +01:00
secure_seq.c tcp: Namespaceify sysctl_tcp_timestamps 2017-06-08 10:53:29 -04:00
skbuff.c net: initialize skb->peeked when cloning 2018-05-16 10:10:23 +02:00
sock.c kmemcheck: remove annotations 2018-02-22 15:42:23 +01:00
sock_diag.c net: core: fix module type in sock_diag_bind 2018-01-17 09:45:21 +01:00
sock_reuseport.c soreuseport: fix mem leak in reuseport_add_sock() 2018-02-13 10:19:48 +01:00
stream.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sysctl_net_core.c bpf: introduce BPF_JIT_ALWAYS_ON config 2018-01-31 14:03:49 +01:00
timestamping.c
tso.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
utils.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-05-02 16:40:27 -07:00