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 '10.128.0.37' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.274007] ================================================================== [ 31.281417] BUG: KMSAN: uninit-value in tipc_node_get_mtu+0x200/0x7a0 [ 31.287974] CPU: 1 PID: 3571 Comm: syzkaller770798 Not tainted 4.16.0+ #82 [ 31.294962] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.304292] Call Trace: [ 31.306862] dump_stack+0x185/0x1d0 [ 31.310470] ? tipc_node_get_mtu+0x200/0x7a0 [ 31.314858] kmsan_report+0x142/0x240 [ 31.318641] __msan_warning_32+0x6c/0xb0 [ 31.322682] tipc_node_get_mtu+0x200/0x7a0 [ 31.326898] __tipc_sendmsg+0x1b32/0x41c0 [ 31.331031] ? kmsan_set_origin_inline+0x6b/0x120 [ 31.335851] ? __msan_poison_alloca+0x15c/0x1d0 [ 31.340498] ? local_bh_enable+0x36/0x40 [ 31.344543] tipc_sendmsg+0xeb/0x140 [ 31.348234] ? tipc_recvmsg+0x1c30/0x1c30 [ 31.352360] ___sys_sendmsg+0xec0/0x1310 [ 31.356398] ? do_huge_pmd_anonymous_page+0x19d5/0x2520 [ 31.361749] ? __fdget+0x4e/0x60 [ 31.365122] SYSC_sendmsg+0x2a3/0x3d0 [ 31.368915] SyS_sendmsg+0x54/0x80 [ 31.372431] do_syscall_64+0x309/0x430 [ 31.376298] ? ___sys_sendmsg+0x1310/0x1310 [ 31.380599] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.386340] RIP: 0033:0x43fd49 [ 31.389506] RSP: 002b:00007ffd0061aba8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 31.397191] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd49 [ 31.404440] RDX: 0000000000000000 RSI: 000000002095ffc8 RDI: 0000000000000003 [ 31.411689] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 31.418944] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401670 [ 31.426195] R13: 0000000000401700 R14: 0000000000000000 R15: 0000000000000000 [ 31.433446] [ 31.435049] Local variable description: ----dnode@__tipc_sendmsg [ 31.441179] Variable was created at: [ 31.444874] __tipc_sendmsg+0x20c/0x41c0 [ 31.448914] tipc_sendmsg+0xeb/0x140 [ 31.452597] ================================================================== [ 31.459929] Disabling lock debugging due to kernel taint [ 31.465357] Kernel panic - not syncing: panic_on_warn set ... [ 31.465357] [ 31.472706] CPU: 1 PID: 3571 Comm: syzkaller770798 Tainted: G B 4.16.0+ #82 [ 31.480999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.490363] Call Trace: [ 31.492939] dump_stack+0x185/0x1d0 [ 31.496551] panic+0x39d/0x940 [ 31.499737] ? tipc_node_get_mtu+0x200/0x7a0 [ 31.504134] kmsan_report+0x238/0x240 [ 31.507928] __msan_warning_32+0x6c/0xb0 [ 31.511973] tipc_node_get_mtu+0x200/0x7a0 [ 31.516192] __tipc_sendmsg+0x1b32/0x41c0 [ 31.520325] ? kmsan_set_origin_inline+0x6b/0x120 [ 31.525156] ? __msan_poison_alloca+0x15c/0x1d0 [ 31.529807] ? local_bh_enable+0x36/0x40 [ 31.533851] tipc_sendmsg+0xeb/0x140 [ 31.537546] ? tipc_recvmsg+0x1c30/0x1c30 [ 31.541674] ___sys_sendmsg+0xec0/0x1310 [ 31.545714] ? do_huge_pmd_anonymous_page+0x19d5/0x2520 [ 31.551058] ? __fdget+0x4e/0x60 [ 31.554410] SYSC_sendmsg+0x2a3/0x3d0 [ 31.558191] SyS_sendmsg+0x54/0x80 [ 31.561710] do_syscall_64+0x309/0x430 [ 31.565578] ? ___sys_sendmsg+0x1310/0x1310 [ 31.569879] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.575054] RIP: 0033:0x43fd49 [ 31.578222] RSP: 002b:00007ffd0061aba8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 31.585907] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd49 [ 31.593162] RDX: 0000000000000000 RSI: 000000002095ffc8 RDI: 0000000000000003 [ 31.600417] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 31.607666] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401670 [ 31.614919] R13: 0000000000401700 R14: 0000000000000000 R15: 0000000000000000 [ 31.622665] Dumping ftrace buffer: [ 31.626189] (ftrace buffer empty) [ 31.629873] Kernel Offset: disabled [ 31.633478] Rebooting in 86400 seconds..