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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.133391] ================================================================== [ 44.140793] BUG: KMSAN: uninit-value in tipc_nl_compat_doit+0x404/0xa10 [ 44.147524] CPU: 0 PID: 4514 Comm: syz-executor485 Not tainted 4.16.0+ #87 [ 44.154512] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.163875] Call Trace: [ 44.166456] dump_stack+0x185/0x1d0 [ 44.170071] ? tipc_nl_compat_doit+0x404/0xa10 [ 44.174641] kmsan_report+0x142/0x240 [ 44.178423] __msan_warning_32+0x6c/0xb0 [ 44.182461] tipc_nl_compat_doit+0x404/0xa10 [ 44.186848] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 44.192280] ? ns_capable+0x1a8/0x1f0 [ 44.196064] tipc_nl_compat_recv+0x164b/0x2700 [ 44.200626] ? _cond_resched+0x3c/0xd0 [ 44.204492] ? mutex_lock+0x31/0x90 [ 44.208102] ? tipc_nl_bearer_disable+0xb0/0xb0 [ 44.212748] ? tipc_nl_compat_dumpit+0x870/0x870 [ 44.217497] ? rcu_all_qs+0x32/0x1f0 [ 44.221192] ? tipc_netlink_compat_stop+0x40/0x40 [ 44.226035] genl_rcv_msg+0x1686/0x1810 [ 44.230004] netlink_rcv_skb+0x378/0x600 [ 44.234061] ? genl_unbind+0x350/0x350 [ 44.237927] genl_rcv+0x63/0x80 [ 44.241189] netlink_unicast+0x166b/0x1740 [ 44.245414] ? genl_pernet_exit+0xa0/0xa0 [ 44.249551] netlink_sendmsg+0x1048/0x1310 [ 44.253770] ? netlink_getsockopt+0xc80/0xc80 [ 44.258266] ___sys_sendmsg+0xec0/0x1310 [ 44.262319] ? do_huge_pmd_anonymous_page+0x19d5/0x2520 [ 44.267680] ? __fdget+0x4e/0x60 [ 44.271032] ? __fget_light+0x56/0x710 [ 44.274904] ? __fdget+0x4e/0x60 [ 44.278250] ? __fget_light+0x1dc/0x710 [ 44.282204] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 44.287546] ? __fget_light+0x1f5/0x710 [ 44.291505] SYSC_sendmsg+0x2a3/0x3d0 [ 44.295289] SyS_sendmsg+0x54/0x80 [ 44.298815] do_syscall_64+0x309/0x430 [ 44.302680] ? ___sys_sendmsg+0x1310/0x1310 [ 44.306999] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.312170] RIP: 0033:0x43fda9 [ 44.315339] RSP: 002b:00007ffd0c184ba8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 44.323039] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fda9 [ 44.330299] RDX: 0000000000000000 RSI: 0000000020023000 RDI: 0000000000000003 [ 44.337549] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 44.344798] R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004016d0 [ 44.352053] R13: 0000000000401760 R14: 0000000000000000 R15: 0000000000000000 [ 44.359313] [ 44.360915] Uninit was created at: [ 44.364436] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 44.369515] kmsan_kmalloc+0x94/0x100 [ 44.373300] kmsan_slab_alloc+0x11/0x20 [ 44.377253] __kmalloc_node_track_caller+0xaed/0x11c0 [ 44.382421] __alloc_skb+0x2cf/0x9f0 [ 44.386114] netlink_sendmsg+0x9a6/0x1310 [ 44.390242] ___sys_sendmsg+0xec0/0x1310 [ 44.394277] SYSC_sendmsg+0x2a3/0x3d0 [ 44.398070] SyS_sendmsg+0x54/0x80 [ 44.401594] do_syscall_64+0x309/0x430 [ 44.405466] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.410636] ================================================================== [ 44.417968] Disabling lock debugging due to kernel taint [ 44.423394] Kernel panic - not syncing: panic_on_warn set ... [ 44.423394] [ 44.430737] CPU: 0 PID: 4514 Comm: syz-executor485 Tainted: G B 4.16.0+ #87 [ 44.439036] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.448375] Call Trace: [ 44.450946] dump_stack+0x185/0x1d0 [ 44.454561] panic+0x39d/0x940 [ 44.457747] ? tipc_nl_compat_doit+0x404/0xa10 [ 44.462307] kmsan_report+0x238/0x240 [ 44.466092] __msan_warning_32+0x6c/0xb0 [ 44.470130] tipc_nl_compat_doit+0x404/0xa10 [ 44.474534] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 44.479975] ? ns_capable+0x1a8/0x1f0 [ 44.483776] tipc_nl_compat_recv+0x164b/0x2700 [ 44.488341] ? _cond_resched+0x3c/0xd0 [ 44.492207] ? mutex_lock+0x31/0x90 [ 44.495822] ? tipc_nl_bearer_disable+0xb0/0xb0 [ 44.500466] ? tipc_nl_compat_dumpit+0x870/0x870 [ 44.505203] ? rcu_all_qs+0x32/0x1f0 [ 44.508895] ? tipc_netlink_compat_stop+0x40/0x40 [ 44.513718] genl_rcv_msg+0x1686/0x1810 [ 44.517680] netlink_rcv_skb+0x378/0x600 [ 44.521721] ? genl_unbind+0x350/0x350 [ 44.525596] genl_rcv+0x63/0x80 [ 44.528854] netlink_unicast+0x166b/0x1740 [ 44.533069] ? genl_pernet_exit+0xa0/0xa0 [ 44.537200] netlink_sendmsg+0x1048/0x1310 [ 44.541414] ? netlink_getsockopt+0xc80/0xc80 [ 44.545891] ___sys_sendmsg+0xec0/0x1310 [ 44.549933] ? do_huge_pmd_anonymous_page+0x19d5/0x2520 [ 44.555278] ? __fdget+0x4e/0x60 [ 44.558621] ? __fget_light+0x56/0x710 [ 44.562487] ? __fdget+0x4e/0x60 [ 44.565839] ? __fget_light+0x1dc/0x710 [ 44.569794] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 44.575138] ? __fget_light+0x1f5/0x710 [ 44.579092] SYSC_sendmsg+0x2a3/0x3d0 [ 44.582884] SyS_sendmsg+0x54/0x80 [ 44.586419] do_syscall_64+0x309/0x430 [ 44.590286] ? ___sys_sendmsg+0x1310/0x1310 [ 44.594595] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.599763] RIP: 0033:0x43fda9 [ 44.602928] RSP: 002b:00007ffd0c184ba8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 44.610620] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fda9 [ 44.617865] RDX: 0000000000000000 RSI: 0000000020023000 RDI: 0000000000000003 [ 44.625113] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 44.632362] R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004016d0 [ 44.639608] R13: 0000000000401760 R14: 0000000000000000 R15: 0000000000000000 [ 44.647419] Dumping ftrace buffer: [ 44.650935] (ftrace buffer empty) [ 44.654620] Kernel Offset: disabled [ 44.658221] Rebooting in 86400 seconds..