Eric Dumazet 6d5e346db4 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 10:06:50 +02:00

..

datagram.c

net: rename SOCK_ASYNC_NOSPACE and SOCK_ASYNC_WAITDATA

2015-12-01 15:45:05 -05:00

dev_addr_lists.c

net: fix uninit-value in __hw_addr_add_ex()

2018-05-16 10:06:50 +02:00

dev_ioctl.c

net: Zero terminate ifr_name in dev_ifname().

2017-08-11 09:08:52 -07:00

dev.c

vlan: Fix reading memory beyond skb->tail in skb_vlan_tagged_multi

2018-04-29 07:50:05 +02:00

drop_monitor.c

drop_monitor: consider inserted data in genlmsg_end

2017-01-15 13:41:35 +01:00

dst_cache.c

net: dst_cache_per_cpu_dst_set() can be static

2018-02-25 11:03:55 +01:00

dst.c

Fix an intermittent pr_emerg warning about lo becoming free.

2017-07-05 14:37:13 +02:00

ethtool.c

ethtool: do not vzalloc(0) on registers dump

2017-06-17 06:39:36 +02:00

fib_rules.c

fib_rules: fix fib rule dumps across multiple skbs

2015-09-24 15:21:54 -07:00

filter.c

bpf: fix 32-bit divide by zero

2018-02-03 17:04:25 +01:00

flow_dissector.c

flow_dissector: properly cap thoff field

2018-01-31 12:06:14 +01:00

flow.c

flow: Move __get_hash_from_flowi{4,6} into flow_dissector.c

2015-09-01 17:00:24 -07:00

gen_estimator.c

…

gen_stats.c

…

link_watch.c

…

lwtunnel.c

dst: Pass net into dst->output

2015-10-08 04:27:03 -07:00

Makefile

net: add dst_cache support

2018-02-25 11:03:34 +01:00

neighbour.c

net: fix deadlock while clearing neighbor proxy table

2018-04-29 07:50:06 +02:00

net_namespace.c

net: move somaxconn init from sysctl code

2018-04-13 19:50:11 +02:00

net-procfs.c

…

net-sysfs.c

switchdev: rename SWITCHDEV_ATTR_* enum values to SWITCHDEV_ATTR_ID_*

2015-10-03 04:49:37 -07:00

net-sysfs.h

…

net-traces.c

net: FIB tracepoints

2015-08-29 13:05:16 -07:00

netclassid_cgroup.c

Merge branch 'master' into for-4.4-fixes

2015-12-07 10:09:03 -05:00

netevent.c

…

netpoll.c

netpoll: Check for skb->queue_mapping

2017-05-02 21:19:53 -07:00

netprio_cgroup.c

cgroup: fix handling of multi-destination migration from subtree_control enabling

2015-12-03 10:18:21 -05:00

pktgen.c

net: pktgen: remove rcu locking in pktgen_change_name()

2016-11-15 07:46:38 +01:00

ptp_classifier.c

ptp: Change ptp_class to a proper bitmask

2015-11-03 11:08:22 -05:00

request_sock.c

tcp: restore fastopen operations

2015-10-05 03:19:06 -07:00

rtnetlink.c

rtnetlink: allocate more memory for dev_set_mac_address()

2017-08-11 09:08:52 -07:00

scm.c

unix: correctly track in-flight fds in sending process user_struct

2016-03-03 15:07:05 -08:00

secure_seq.c

…

skbuff.c

net: initialize skb->peeked when cloning

2018-05-16 10:06:50 +02:00

sock_diag.c

net: core: fix module type in sock_diag_bind

2018-01-17 09:35:29 +01:00

sock.c

net: Set sk_prot_creator when cloning sockets to the right proto

2017-10-21 17:09:03 +02:00

stream.c

net: fix sock_wake_async() rcu protection

2015-12-01 15:45:05 -05:00

sysctl_net_core.c

net: move somaxconn init from sysctl code

2018-04-13 19:50:11 +02:00

timestamping.c

…

tso.c

net: tso: add support for IPv6

2015-10-26 22:24:22 -07:00

utils.c

net: move net_get_random_once to lib

2015-10-08 05:26:35 -07:00