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 '10.128.0.40' (ECDSA) to the list of known hosts. syzkaller login: [ 30.463147] Not allocated shadow for addr ffff8801a3158000 (page ffffea0009d28100) [ 30.470875] Attempted to access 102 bytes [ 30.475022] ------------[ cut here ]------------ [ 30.479751] kernel BUG at mm/kmsan/kmsan.c:1326! [ 30.484483] invalid opcode: 0000 [#1] SMP PTI [ 30.488950] Dumping ftrace buffer: [ 30.492459] (ftrace buffer empty) [ 30.496140] Modules linked in: [ 30.499308] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0+ #83 [ 30.505508] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.514847] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 [ 30.520442] RSP: 0018:ffff88021fc0eed8 EFLAGS: 00010086 [ 30.525779] RAX: 000000000000001d RBX: 0000000000000680 RCX: 0000000000000000 [ 30.533027] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 [ 30.540269] RBP: ffff88021fc0eef0 R08: 0000000000000000 R09: 0000000000000001 [ 30.547512] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801a3158000 [ 30.554757] R13: 0000000000000066 R14: 0000000000000001 R15: 0000000000000066 [ 30.562002] FS: 0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 30.570200] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.576054] CR2: 00007f5b1b789f70 CR3: 00000001d008c000 CR4: 00000000001406f0 [ 30.583297] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.590540] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.597791] Call Trace: [ 30.600345] [ 30.602473] kmsan_internal_unpoison_shadow+0x5c/0xe0 [ 30.607638] kmsan_unpoison_shadow+0x66/0xb0 [ 30.612022] virtqueue_get_buf_ctx+0x742/0xa20 [ 30.616580] virtqueue_get_buf+0x72/0x90 [ 30.620616] start_xmit+0x276/0x2840 [ 30.624306] ? virtnet_close+0x2c0/0x2c0 [ 30.628341] dev_hard_start_xmit+0x5f1/0xc70 [ 30.632727] sch_direct_xmit+0x540/0x8f0 [ 30.636770] __qdisc_run+0x1785/0x3730 [ 30.640633] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 30.645973] __dev_queue_xmit+0x174a/0x2b60 [ 30.650272] dev_queue_xmit+0x4b/0x60 [ 30.654050] ip_finish_output2+0x1198/0x1380 [ 30.658435] ip_finish_output+0xcb0/0xff0 [ 30.662567] ip_output+0x502/0x5c0 [ 30.666081] ? ip_mc_finish_output+0x3b0/0x3b0 [ 30.670636] ? ip_finish_output+0xff0/0xff0 [ 30.674932] ip_queue_xmit+0x1fae/0x21c0 [ 30.678968] ? __ip_local_out+0x5b0/0x5b0 [ 30.683091] ? __msan_poison_alloca+0x15c/0x1d0 [ 30.687734] ? ip_output+0x5c0/0x5c0 [ 30.691424] tcp_transmit_skb+0x38be/0x51f0 [ 30.695723] tcp_send_ack+0x7e3/0x910 [ 30.699501] tcp_delack_timer_handler+0x5d0/0xac0 [ 30.704319] tcp_delack_timer+0x1be/0x360 [ 30.708439] ? call_timer_fn+0x7e/0x5a0 [ 30.712387] call_timer_fn+0x26a/0x5a0 [ 30.716248] ? tcp_write_timer+0x290/0x290 [ 30.720457] __run_timers+0xda7/0x11c0 [ 30.724317] ? tcp_write_timer+0x290/0x290 [ 30.728527] ? irq_exit+0x202/0x240 [ 30.732136] ? run_timer_softirq+0x14/0x70 [ 30.736343] ? timers_dead_cpu+0x1010/0x1010 [ 30.740724] run_timer_softirq+0x43/0x70 [ 30.744765] __do_softirq+0x56d/0x93d [ 30.748543] irq_exit+0x202/0x240 [ 30.751971] exiting_irq+0xe/0x10 [ 30.755400] smp_apic_timer_interrupt+0x64/0x90 [ 30.760042] apic_timer_interrupt+0xf/0x20 [ 30.764248] [ 30.766460] RIP: 0010:default_idle+0x1fb/0x3c0 [ 30.771012] RSP: 0018:ffffffff87c0fd88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 [ 30.778691] RAX: ffff880203eb5440 RBX: 0000000000000000 RCX: ffff880000000000 [ 30.785933] RDX: ffff880203ab5440 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 30.793176] RBP: ffffffff87c0fdc0 R08: 0000000001080020 R09: 0000000000000002 [ 30.800417] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.807660] R13: ffffffff87c1eb00 R14: ffffffff87c0fe24 R15: ffffffff87c1f418 [ 30.814911] ? default_idle+0x6b/0x3c0 [ 30.818773] ? __sched_text_end+0x1/0x1 [ 30.822724] arch_cpu_idle+0x20/0x30 [ 30.826414] do_idle+0x349/0x790 [ 30.829763] cpu_startup_entry+0x45/0x50 [ 30.833802] rest_init+0x1c1/0x1f0 [ 30.837318] ? hpet_time_init+0x20/0xe0 [ 30.841266] start_kernel+0xf93/0xfb0 [ 30.845042] x86_64_start_kernel+0x2fa/0x310 [ 30.849426] secondary_startup_64+0xa5/0xb0 [ 30.853720] Code: 75 29 48 c7 c7 71 2a a1 87 31 c0 e8 0d 11 86 ff 80 3c 25 a8 a4 2d 88 00 75 11 48 c7 c7 a1 2a a1 87 31 c0 4c 89 fe e8 f2 10 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 [ 30.872797] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff88021fc0eed8 [ 30.879873] ---[ end trace e78bf19be950c807 ]--- [ 30.884598] Kernel panic - not syncing: Fatal exception in interrupt [ 30.891526] Dumping ftrace buffer: [ 30.895046] (ftrace buffer empty) [ 30.898728] Kernel Offset: disabled [ 30.902330] Rebooting in 86400 seconds..