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KMSAN: uninit-value in __hw_addr_add_ex

Status: upstream: reported on 2022/11/18 12:01
Subsystems: net (incorrect?)
Reported-by: syzbot+cec7816c907e0923fdcc@syzkaller.appspotmail.com
First crash: 444d, last: 4d16h

Sample crash report:
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
=====================================================
BUG: KMSAN: uninit-value in memcmp+0x23e/0x290 lib/string.c:789
 memcmp+0x23e/0x290 lib/string.c:789
 __hw_addr_add_ex+0x2f9/0x1020 net/core/dev_addr_lists.c:62
 __hw_addr_sync_one net/core/dev_addr_lists.c:210 [inline]
 __hw_addr_sync_multiple+0x35f/0xa40 net/core/dev_addr_lists.c:250
 dev_mc_sync_multiple+0x195/0x2b0 net/core/dev_addr_lists.c:959
 team_set_rx_mode+0x143/0x230 drivers/net/team/team.c:1780
 __dev_set_rx_mode+0x3b0/0x440 net/core/dev.c:8717
 __dev_mc_add net/core/dev_addr_lists.c:836 [inline]
 dev_mc_add+0x180/0x1d0 net/core/dev_addr_lists.c:850
 igmp6_group_added+0x320/0x830 net/ipv6/mcast.c:680
 __ipv6_dev_mc_inc+0x11e9/0x1620 net/ipv6/mcast.c:949
 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

Uninit was stored to memory at:
 __hw_addr_create net/core/dev_addr_lists.c:32 [inline]
 __hw_addr_add_ex+0x718/0x1020 net/core/dev_addr_lists.c:93
 __dev_mc_add net/core/dev_addr_lists.c:832 [inline]
 dev_mc_add+0x10a/0x1d0 net/core/dev_addr_lists.c:850
 igmp6_group_added+0x320/0x830 net/ipv6/mcast.c:680
 __ipv6_dev_mc_inc+0x11e9/0x1620 net/ipv6/mcast.c:949
 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 buf created at:
 igmp6_group_added+0x9b/0x830 net/ipv6/mcast.c:671
 __ipv6_dev_mc_inc+0x11e9/0x1620 net/ipv6/mcast.c:949

CPU: 1 PID: 25 Comm: kworker/1:1 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 (272):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kmsan-gce-386 2022/01/04 23:22 https://github.com/google/kmsan.git master 81c325bbf94e 0a2584dd .config console log report info KMSAN: uninit-value in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/20 08:12 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 7939252e .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/19 16:08 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 7939252e .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/19 07:43 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 7939252e .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/18 12:07 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 7939252e .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/17 08:17 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 18b58603 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/16 19:27 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 18b58603 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/14 08:20 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 026e2200 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/12 02:11 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 5205ef30 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/11 11:23 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 5205ef30 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/11 09:26 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 5205ef30 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/11 06:10 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 5205ef30 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/10 06:52 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f08b59ac .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/10 05:13 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f08b59ac .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/06 08:02 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/06 07:01 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/05 13:56 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/05 06:05 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/05 02:34 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/04 15:30 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/03 17:18 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/02 23:43 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/02 18:59 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/02 17:10 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 f8902b57 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/03/01 02:42 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 95aee97a .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/28 21:05 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 95aee97a .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/26 12:30 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 e792ae78 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/25 23:37 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 e792ae78 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/20 14:09 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d bcdf85f8 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/02 12:09 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/02 10:09 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/02 06:11 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/02 01:03 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/01 17:55 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/01 09:00 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/01 07:28 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/02/01 01:53 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/01/31 21:43 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/01/31 12:14 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/01/30 18:49 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/01/28 10:57 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/01/28 07:10 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/01/28 00:00 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
ci-qemu2-riscv64 2023/01/26 17:56 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 7374c4e5 .config console log report info KASAN: global-out-of-bounds Read in __hw_addr_add_ex
* Struck through repros no longer work on HEAD.