syzbot


KMSAN: uninit-value in __ipv6_dev_mc_inc

Status: auto-closed as invalid on 2022/05/17 06:51
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 351d, last: 283d

Sample crash report:
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
=====================================================
BUG: KMSAN: uninit-value in __ipv6_dev_mc_inc+0x65a/0x1620 net/ipv6/mcast.c:927
 __ipv6_dev_mc_inc+0x65a/0x1620 net/ipv6/mcast.c:927
 ipv6_dev_mc_inc+0x70/0x80 net/ipv6/mcast.c:957
 addrconf_join_solict net/ipv6/addrconf.c:2179 [inline]
 addrconf_dad_begin net/ipv6/addrconf.c:3958 [inline]
 addrconf_dad_work+0x736/0x2210 net/ipv6/addrconf.c:4085
 process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298
 worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445
 kthread+0x721/0x850 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

Local variable maddr.i.i created at:
 addrconf_join_solict net/ipv6/addrconf.c:2173 [inline]
 addrconf_dad_begin net/ipv6/addrconf.c:3958 [inline]
 addrconf_dad_work+0x32c/0x2210 net/ipv6/addrconf.c:4085
 process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298

CPU: 0 PID: 12210 Comm: kworker/0:1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
=====================================================

Crashes (14):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kmsan-gce-386 2022/02/16 06:49 https://github.com/google/kmsan.git master 85cfd6e539bd 8b9ca619 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2022/02/15 02:08 https://github.com/google/kmsan.git master 85cfd6e539bd 8b9ca619 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2022/02/06 13:24 https://github.com/google/kmsan.git master 85cfd6e539bd a7dab638 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2022/01/29 06:20 https://github.com/google/kmsan.git master 85cfd6e539bd 495e00c5 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2022/01/28 14:07 https://github.com/google/kmsan.git master 85cfd6e539bd 495e00c5 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2022/01/28 13:07 https://github.com/google/kmsan.git master 85cfd6e539bd 495e00c5 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2022/01/22 06:12 https://github.com/google/kmsan.git master 85cfd6e539bd 214351e1 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2022/01/21 12:17 https://github.com/google/kmsan.git master 85cfd6e539bd ab3d9f17 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2022/01/18 07:37 https://github.com/google/kmsan.git master fa3879a274df 731a2d23 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2021/12/26 16:37 https://github.com/google/kmsan.git master 81c325bbf94e e4f103c4 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2021/12/19 15:16 https://github.com/google/kmsan.git master b0a8b5053e8b 44068e19 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2021/12/17 01:18 https://github.com/google/kmsan.git master d7f51389fa36 8dd6a5e3 .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2021/12/14 10:26 https://github.com/google/kmsan.git master d82a8a8ca942 5d14b1ea .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
ci-upstream-kmsan-gce-386 2021/12/10 09:44 https://github.com/google/kmsan.git master 8b936c96768e 4d4ce9bc .config log report info KMSAN: uninit-value in __ipv6_dev_mc_inc
* Struck through repros no longer work on HEAD.