| TITLE: KMSAN: uninit-value in __dev_mc_add |
| |
| syzkaller login: [ 30.164779] ================================================================== |
| [ 30.172283] BUG: KMSAN: uninit-value in memcmp+0x119/0x180 |
| [ 30.177916] CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.16.0+ #82 |
| [ 30.184318] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 30.193686] Workqueue: ipv6_addrconf addrconf_dad_work |
| [ 30.198962] Call Trace: |
| [ 30.201561] dump_stack+0x185/0x1d0 |
| [ 30.205216] ? memcmp+0x119/0x180 |
| [ 30.208673] kmsan_report+0x142/0x240 |
| [ 30.212484] __msan_warning_32+0x6c/0xb0 |
| [ 30.216549] memcmp+0x119/0x180 |
| [ 30.219845] __dev_mc_add+0x1c2/0x8e0 |
| [ 30.223658] ? ndisc_mc_map+0x59f/0x8c0 |
| [ 30.227634] dev_mc_add+0x6d/0x80 |
| [ 30.231092] igmp6_group_added+0x2db/0xa00 |
| [ 30.235338] ipv6_dev_mc_inc+0xe9e/0x1130 |
| [ 30.239495] addrconf_dad_work+0x427/0x2150 |
| [ 30.243823] ? ipv6_get_saddr_eval+0x1130/0x1130 |
| [ 30.248585] ? ipv6_get_saddr_eval+0x1130/0x1130 |
| [ 30.253348] process_one_work+0x12c6/0x1f60 |
| [ 30.257685] worker_thread+0x113c/0x24f0 |
| [ 30.261763] ? process_one_work+0x1f60/0x1f60 |
| [ 30.266254] kthread+0x539/0x720 |
| [ 30.269616] ? process_one_work+0x1f60/0x1f60 |
| [ 30.274097] ? kthread_blkcg+0xf0/0xf0 |
| [ 30.277976] ret_from_fork+0x35/0x40 |
| [ 30.281670] |
| [ 30.283279] Local variable description: ----buf@igmp6_group_added |
| [ 30.289491] Variable was created at: |
| [ 30.293192] igmp6_group_added+0x4a/0xa00 |
| [ 30.297338] ipv6_dev_mc_inc+0xe9e/0x1130 |
| [ 30.301465] ================================================================== |
