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KMSAN: uninit-value in bond_neigh_setup

Status: fixed on 2020/02/14 01:19
Subsystems: net
[Documentation on labels]
Fix commit: f394722fb0d0 net-backports: neighbour: remove neigh_cleanup() method
First crash: 1879d, last: 1855d

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
CPU: 0 PID: 3032 Comm: kworker/0:1 Not tainted 5.5.0-rc1-syzkaller #0
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:77 [inline]
 dump_stack+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0xf8/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
 bond_neigh_init+0x216/0x4b0 drivers/net/bonding/bond_main.c:3716
 ___neigh_create+0x15f1/0x2e20 net/core/neighbour.c:613
 __neigh_create+0xbd/0xd0 net/core/neighbour.c:674
 ip6_finish_output2+0x149a/0x2670 net/ipv6/ip6_output.c:113
 __ip6_finish_output+0x83d/0x8f0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x2db/0x420 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x60a/0x770 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ndisc_send_skb+0x1083/0x15e0 net/ipv6/ndisc.c:505
 ndisc_send_ns+0xb9b/0xc00 net/ipv6/ndisc.c:647
 addrconf_dad_work+0x1dea/0x2ac0 net/ipv6/addrconf.c:4120
 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2264
 worker_thread+0x111b/0x2460 kernel/workqueue.c:2410
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353

Local variable ----parms@bond_neigh_init created at:
 bond_neigh_init+0x8c/0x4b0 drivers/net/bonding/bond_main.c:3707
 bond_neigh_init+0x8c/0x4b0 drivers/net/bonding/bond_main.c:3707
=====================================================

Crashes (64):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/12/31 16:58 https://github.com/google/kmsan.git master 997a8b55bc92 25a0186e .config console log report ci-upstream-kmsan-gce
2019/12/31 14:55 https://github.com/google/kmsan.git master 997a8b55bc92 25a0186e .config console log report ci-upstream-kmsan-gce
2019/12/30 19:00 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/30 16:17 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/30 14:51 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/30 10:59 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/30 02:26 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/30 00:54 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/29 21:05 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/29 19:41 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/29 17:02 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/29 15:27 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/28 19:54 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/28 16:29 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/28 13:31 https://github.com/google/kmsan.git master 997a8b55bc92 af6b8ef8 .config console log report ci-upstream-kmsan-gce
2019/12/28 10:54 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/28 09:54 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/28 08:32 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/28 06:47 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/28 05:46 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/28 05:21 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/28 03:10 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 21:13 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 20:50 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 19:46 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 13:39 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 09:13 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 09:08 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 08:42 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 06:34 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 06:33 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/27 02:09 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 23:28 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 21:46 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 21:39 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 19:46 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 15:16 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 14:49 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 12:58 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 12:16 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 11:51 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 08:26 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 08:02 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 05:24 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 05:00 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/26 03:17 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/25 23:27 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/25 21:27 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/25 18:42 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/25 18:37 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/25 18:23 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/25 17:31 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/25 04:03 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/24 19:37 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/24 11:27 https://github.com/google/kmsan.git master 997a8b55bc92 be5c2c81 .config console log report ci-upstream-kmsan-gce
2019/12/07 04:58 https://github.com/google/kmsan.git master f8f75f037ea5 85f26751 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.