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 '10.128.0.29' (ECDSA) to the list of known hosts. syzkaller login: [ 74.588169] Not allocated shadow for addr ffff8801aa574000 (page ffffea0009fe0b80) [ 74.595888] Attempted to access 102 bytes [ 74.600031] ------------[ cut here ]------------ [ 74.604756] kernel BUG at mm/kmsan/kmsan.c:1326! [ 74.609484] invalid opcode: 0000 [#1] SMP PTI [ 74.613947] Dumping ftrace buffer: [ 74.617455] (ftrace buffer empty) [ 74.621134] Modules linked in: [ 74.624300] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0+ #82 [ 74.630497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.639831] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 [ 74.645423] RSP: 0018:ffff88021fc0eed8 EFLAGS: 00010086 [ 74.650758] RAX: 000000000000001d RBX: 00000000000006a0 RCX: 0000000000000000 [ 74.658000] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 [ 74.665242] RBP: ffff88021fc0eef0 R08: 0000000000000000 R09: 0000000000000001 [ 74.672482] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801aa574000 [ 74.679724] R13: 0000000000000066 R14: 0000000000000001 R15: 0000000000000066 [ 74.686964] FS: 0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 74.695161] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.701015] CR2: ffffffffff600400 CR3: 00000001d6f2c000 CR4: 00000000001406f0 [ 74.708257] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.715497] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.722734] Call Trace: [ 74.725285] [ 74.727413] kmsan_internal_unpoison_shadow+0x5c/0xe0 [ 74.732581] kmsan_unpoison_shadow+0x66/0xb0 [ 74.736968] virtqueue_get_buf_ctx+0x742/0xa20 [ 74.741525] virtqueue_get_buf+0x72/0x90 [ 74.745558] start_xmit+0x276/0x2840 [ 74.749256] ? virtnet_close+0x2c0/0x2c0 [ 74.753291] dev_hard_start_xmit+0x5f1/0xc70 [ 74.757677] sch_direct_xmit+0x540/0x8f0 [ 74.761716] __qdisc_run+0x1785/0x3730 [ 74.765577] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 74.770918] __dev_queue_xmit+0x174a/0x2b60 [ 74.775215] dev_queue_xmit+0x4b/0x60 [ 74.778990] ip_finish_output2+0x1198/0x1380 [ 74.783373] ip_finish_output+0xcb0/0xff0 [ 74.787503] ip_output+0x502/0x5c0 [ 74.791017] ? ip_mc_finish_output+0x3b0/0x3b0 [ 74.795569] ? ip_finish_output+0xff0/0xff0 [ 74.799859] ip_queue_xmit+0x1fae/0x21c0 [ 74.803896] ? __ip_local_out+0x5b0/0x5b0 [ 74.808015] ? __msan_poison_alloca+0x15c/0x1d0 [ 74.812656] ? ip_output+0x5c0/0x5c0 [ 74.816343] tcp_transmit_skb+0x38be/0x51f0 [ 74.820640] tcp_send_ack+0x7e3/0x910 [ 74.824412] tcp_delack_timer_handler+0x5d0/0xac0 [ 74.829226] tcp_delack_timer+0x1be/0x360 [ 74.833348] ? call_timer_fn+0x7e/0x5a0 [ 74.837291] call_timer_fn+0x26a/0x5a0 [ 74.841149] ? tcp_write_timer+0x290/0x290 [ 74.845357] __run_timers+0xda7/0x11c0 [ 74.849216] ? tcp_write_timer+0x290/0x290 [ 74.853428] ? irq_exit+0x202/0x240 [ 74.857027] ? run_timer_softirq+0x14/0x70 [ 74.861233] ? timers_dead_cpu+0x1010/0x1010 [ 74.865614] run_timer_softirq+0x43/0x70 [ 74.869648] __do_softirq+0x56d/0x93d [ 74.873422] irq_exit+0x202/0x240 [ 74.876854] exiting_irq+0xe/0x10 [ 74.880287] smp_apic_timer_interrupt+0x64/0x90 [ 74.884927] apic_timer_interrupt+0xf/0x20 [ 74.889140] [ 74.891350] RIP: 0010:default_idle+0x1fb/0x3c0 [ 74.895911] RSP: 0018:ffffffff87c0fd88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 [ 74.903596] RAX: ffff880203eb5440 RBX: 0000000000000000 RCX: ffff880000000000 [ 74.910837] RDX: ffff880203ab5440 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 74.918078] RBP: ffffffff87c0fdc0 R08: 0000000001080020 R09: 0000000000000002 [ 74.925320] R10: 000000115dca8f00 R11: 0000000000000000 R12: 0000000000000000 [ 74.932563] R13: ffffffff87c1eb00 R14: ffffffff87c0fe24 R15: ffffffff87c1f418 [ 74.939809] ? default_idle+0x6b/0x3c0 [ 74.943667] ? __sched_text_end+0x1/0x1 [ 74.947611] arch_cpu_idle+0x20/0x30 [ 74.951297] do_idle+0x349/0x790 [ 74.954640] cpu_startup_entry+0x45/0x50 [ 74.958674] rest_init+0x1c1/0x1f0 [ 74.962185] ? hpet_time_init+0x20/0xe0 [ 74.966143] start_kernel+0xf93/0xfb0 [ 74.969917] x86_64_start_kernel+0x2fa/0x310 [ 74.974301] secondary_startup_64+0xa5/0xb0 [ 74.978589] 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 [ 74.997658] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff88021fc0eed8 [ 75.004732] ---[ end trace bb05b488cfd9b8c7 ]--- [ 75.009454] Kernel panic - not syncing: Fatal exception in interrupt [ 75.016271] Dumping ftrace buffer: [ 75.019784] (ftrace buffer empty) [ 75.023466] Kernel Offset: disabled [ 75.027064] Rebooting in 86400 seconds..