INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.116527] ================================================================== [ 32.123924] BUG: KMSAN: uninit-value in neigh_dump_info+0x1af0/0x2250 [ 32.130480] CPU: 1 PID: 3575 Comm: syzkaller268891 Not tainted 4.16.0+ #83 [ 32.137463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.146790] Call Trace: [ 32.149358] dump_stack+0x185/0x1d0 [ 32.152963] ? neigh_dump_info+0x1af0/0x2250 [ 32.157350] kmsan_report+0x142/0x240 [ 32.161128] __msan_warning_32+0x6c/0xb0 [ 32.165166] neigh_dump_info+0x1af0/0x2250 [ 32.169386] ? neigh_delete+0x980/0x980 [ 32.173600] netlink_dump+0x9ad/0x1540 [ 32.177469] __netlink_dump_start+0x1167/0x12a0 [ 32.182119] rtnetlink_rcv_msg+0x1435/0x1560 [ 32.186505] ? neigh_delete+0x980/0x980 [ 32.190457] ? neigh_delete+0x980/0x980 [ 32.194408] ? __msan_poison_alloca+0x15c/0x1d0 [ 32.199063] ? _raw_spin_unlock_bh+0x57/0x70 [ 32.203459] ? __local_bh_enable_ip+0x3b/0x140 [ 32.208025] ? _raw_spin_unlock_bh+0x57/0x70 [ 32.212419] ? kmsan_set_origin_inline+0x6b/0x120 [ 32.217238] ? kmsan_set_origin+0x9e/0x160 [ 32.221458] netlink_rcv_skb+0x355/0x5f0 [ 32.225500] ? rtnetlink_bind+0x120/0x120 [ 32.229625] rtnetlink_rcv+0x50/0x60 [ 32.233316] netlink_unicast+0x1672/0x1750 [ 32.237529] ? rtnetlink_net_exit+0xa0/0xa0 [ 32.241831] netlink_sendmsg+0x1048/0x1310 [ 32.246054] ? netlink_getsockopt+0xc80/0xc80 [ 32.250527] ___sys_sendmsg+0xec0/0x1310 [ 32.254581] ? do_huge_pmd_anonymous_page+0x19d5/0x2520 [ 32.259937] ? __fdget+0x4e/0x60 [ 32.263286] ? __fget_light+0x56/0x710 [ 32.267158] ? __fdget+0x4e/0x60 [ 32.270499] ? __fget_light+0x1dc/0x710 [ 32.274452] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 32.279791] ? __fget_light+0x1f5/0x710 [ 32.283749] SYSC_sendmsg+0x2a3/0x3d0 [ 32.287529] SyS_sendmsg+0x54/0x80 [ 32.291056] do_syscall_64+0x309/0x430 [ 32.294931] ? ___sys_sendmsg+0x1310/0x1310 [ 32.299230] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 32.304394] RIP: 0033:0x43fed9 [ 32.307561] RSP: 002b:00007ffddbee2798 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 32.315243] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fed9 [ 32.322489] RDX: 0000000000000000 RSI: 0000000020005000 RDI: 0000000000000003 [ 32.329736] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 32.336981] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401800 [ 32.344228] R13: 0000000000401890 R14: 0000000000000000 R15: 0000000000000000 [ 32.351475] [ 32.353079] Uninit was created at: [ 32.356611] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 32.361690] kmsan_kmalloc+0x94/0x100 [ 32.365473] kmsan_slab_alloc+0x11/0x20 [ 32.369423] __kmalloc_node_track_caller+0xaed/0x11c0 [ 32.374590] __alloc_skb+0x2cf/0x9f0 [ 32.378279] netlink_sendmsg+0x9a6/0x1310 [ 32.382401] ___sys_sendmsg+0xec0/0x1310 [ 32.386446] SYSC_sendmsg+0x2a3/0x3d0 [ 32.390221] SyS_sendmsg+0x54/0x80 [ 32.393741] do_syscall_64+0x309/0x430 [ 32.397606] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 32.402767] ================================================================== [ 32.410100] Disabling lock debugging due to kernel taint [ 32.415523] Kernel panic - not syncing: panic_on_warn set ... [ 32.415523] [ 32.422863] CPU: 1 PID: 3575 Comm: syzkaller268891 Tainted: G B 4.16.0+ #83 [ 32.431158] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.440490] Call Trace: [ 32.443064] dump_stack+0x185/0x1d0 [ 32.446674] panic+0x39d/0x940 [ 32.449855] ? neigh_dump_info+0x1af0/0x2250 [ 32.454241] kmsan_report+0x238/0x240 [ 32.458033] __msan_warning_32+0x6c/0xb0 [ 32.462086] neigh_dump_info+0x1af0/0x2250 [ 32.466308] ? neigh_delete+0x980/0x980 [ 32.470263] netlink_dump+0x9ad/0x1540 [ 32.474139] __netlink_dump_start+0x1167/0x12a0 [ 32.478790] rtnetlink_rcv_msg+0x1435/0x1560 [ 32.483176] ? neigh_delete+0x980/0x980 [ 32.487127] ? neigh_delete+0x980/0x980 [ 32.491078] ? __msan_poison_alloca+0x15c/0x1d0 [ 32.495720] ? _raw_spin_unlock_bh+0x57/0x70 [ 32.500114] ? __local_bh_enable_ip+0x3b/0x140 [ 32.504672] ? _raw_spin_unlock_bh+0x57/0x70 [ 32.509062] ? kmsan_set_origin_inline+0x6b/0x120 [ 32.513883] ? kmsan_set_origin+0x9e/0x160 [ 32.518097] netlink_rcv_skb+0x355/0x5f0 [ 32.522137] ? rtnetlink_bind+0x120/0x120 [ 32.526263] rtnetlink_rcv+0x50/0x60 [ 32.529956] netlink_unicast+0x1672/0x1750 [ 32.534175] ? rtnetlink_net_exit+0xa0/0xa0 [ 32.538475] netlink_sendmsg+0x1048/0x1310 [ 32.542694] ? netlink_getsockopt+0xc80/0xc80 [ 32.547165] ___sys_sendmsg+0xec0/0x1310 [ 32.551207] ? do_huge_pmd_anonymous_page+0x19d5/0x2520 [ 32.556555] ? __fdget+0x4e/0x60 [ 32.559897] ? __fget_light+0x56/0x710 [ 32.563758] ? __fdget+0x4e/0x60 [ 32.567100] ? __fget_light+0x1dc/0x710 [ 32.571063] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 32.576412] ? __fget_light+0x1f5/0x710 [ 32.580368] SYSC_sendmsg+0x2a3/0x3d0 [ 32.584149] SyS_sendmsg+0x54/0x80 [ 32.587667] do_syscall_64+0x309/0x430 [ 32.591544] ? ___sys_sendmsg+0x1310/0x1310 [ 32.595846] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 32.601011] RIP: 0033:0x43fed9 [ 32.604185] RSP: 002b:00007ffddbee2798 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 32.611867] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fed9 [ 32.619110] RDX: 0000000000000000 RSI: 0000000020005000 RDI: 0000000000000003 [ 32.626357] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 32.633601] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401800 [ 32.640845] R13: 0000000000401890 R14: 0000000000000000 R15: 0000000000000000 [ 32.648532] Dumping ftrace buffer: [ 32.652052] (ftrace buffer empty) [ 32.655735] Kernel Offset: disabled [ 32.659333] Rebooting in 86400 seconds..