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| author |   Eric Dumazet <edumazet@google.com> | 2018-04-07 13:42:40 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-04-07 22:32:31 -0400 |
| commit | 77d36398d99f2565c0a8d43a86fd520a82e64bb8 (patch) | |
| tree | c184fd866d868a73a0e57f05c48667a4657605eb /net/dccp/ipv4.c | |
| parent | net: initialize skb->peeked when cloning (diff) | |
| download | linux-dev-77d36398d99f2565c0a8d43a86fd520a82e64bb8.tar.xz linux-dev-77d36398d99f2565c0a8d43a86fd520a82e64bb8.zip | |
net: fix uninit-value in __hw_addr_add_ex()
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: f001fde5eadd ("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>
Diffstat (limited to 'net/dccp/ipv4.c')
0 files changed, 0 insertions, 0 deletions