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 '10.128.10.34' (ECDSA) to the list of known hosts. syzkaller login: [ 63.237258] Not allocated shadow for addr ffff8801d4214000 (page ffffea000af8c780) [ 63.245006] Attempted to access 110 bytes [ 63.249183] ------------[ cut here ]------------ [ 63.253926] kernel BUG at mm/kmsan/kmsan.c:1326! [ 63.258680] invalid opcode: 0000 [#1] SMP PTI [ 63.263152] Dumping ftrace buffer: [ 63.266666] (ftrace buffer empty) [ 63.270352] Modules linked in: [ 63.273526] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.16.0+ #87 [ 63.279731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.289088] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 [ 63.294710] RSP: 0018:ffff88021fd0eef8 EFLAGS: 00010082 [ 63.300056] RAX: 000000000000001d RBX: 0000000000000740 RCX: 0000000000000000 [ 63.307315] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 [ 63.314685] RBP: ffff88021fd0ef10 R08: 0000000000000000 R09: 0000000000000001 [ 63.321940] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d4214000 [ 63.329203] R13: 000000000000006e R14: 0000000000000001 R15: 000000000000006e [ 63.336466] FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 63.344669] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.350552] CR2: 00007f0895d50100 CR3: 00000001b612a000 CR4: 00000000001406e0 [ 63.357801] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.365048] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.372294] Call Trace: [ 63.374853] [ 63.376985] kmsan_internal_unpoison_shadow+0x5c/0xe0 [ 63.382161] kmsan_unpoison_shadow+0x66/0xb0 [ 63.386551] virtqueue_get_buf_ctx+0x742/0xa20 [ 63.391112] virtqueue_get_buf+0x72/0x90 [ 63.395158] start_xmit+0x293/0x29a0 [ 63.398853] ? packet_rcv+0x21a0/0x21a0 [ 63.402808] ? virtnet_close+0x2c0/0x2c0 [ 63.406847] dev_hard_start_xmit+0x5f1/0xc70 [ 63.411240] sch_direct_xmit+0x540/0x8f0 [ 63.415283] __qdisc_run+0x1785/0x3730 [ 63.419156] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 63.424611] __dev_queue_xmit+0x1d50/0x3520 [ 63.428919] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 63.434273] dev_queue_xmit+0x4b/0x60 [ 63.438062] ip_finish_output2+0x12a1/0x1470 [ 63.442457] ip_finish_output+0xcb2/0xff0 [ 63.446607] ip_output+0x505/0x5d0 [ 63.450150] ? ip_mc_finish_output+0x3b0/0x3b0 [ 63.455449] ? ip_finish_output+0xff0/0xff0 [ 63.459772] ip_queue_xmit+0x1a1e/0x1d10 [ 63.463821] ? __msan_metadata_ptr_for_store_2+0x13/0x20 [ 63.469252] ? kmsan_set_origin+0x9e/0x160 [ 63.473466] ? ip_output+0x5d0/0x5d0 [ 63.477156] tcp_transmit_skb+0x3d81/0x53d0 [ 63.481466] tcp_send_ack+0x7e3/0x910 [ 63.485256] tcp_delack_timer_handler+0x5d0/0xac0 [ 63.490085] tcp_delack_timer+0x1be/0x360 [ 63.495365] ? call_timer_fn+0x7e/0x5a0 [ 63.499354] call_timer_fn+0x26a/0x5a0 [ 63.503226] ? tcp_write_timer+0x290/0x290 [ 63.507457] __run_timers+0xda7/0x11c0 [ 63.511343] ? tcp_write_timer+0x290/0x290 [ 63.515565] ? irq_exit+0x202/0x240 [ 63.519180] ? run_timer_softirq+0x14/0x70 [ 63.523400] ? timers_dead_cpu+0x1010/0x1010 [ 63.527789] run_timer_softirq+0x43/0x70 [ 63.531843] __do_softirq+0x56d/0x93d [ 63.535657] irq_exit+0x202/0x240 [ 63.539093] exiting_irq+0xe/0x10 [ 63.542529] smp_apic_timer_interrupt+0x64/0x90 [ 63.547185] apic_timer_interrupt+0xf/0x20 [ 63.551408] [ 63.553625] RIP: 0010:default_idle+0x1fb/0x3c0 [ 63.558961] RSP: 0018:ffff8801d96bfdf0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 [ 63.566731] RAX: ffff8801fddd81a0 RBX: 0000000000000000 RCX: ffff880000000000 [ 63.573985] RDX: ffff8801fd9d81a0 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 63.581323] RBP: ffff8801d96bfe28 R08: 0000000001080020 R09: 0000000000000002 [ 63.588574] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 63.595827] R13: ffff8801d9633b00 R14: ffff8801d96bfe8c R15: ffff8801d9634418 [ 63.603199] ? __cpuidle_text_start+0x8/0x8 [ 63.607514] arch_cpu_idle+0x20/0x30 [ 63.611217] do_idle+0x349/0x790 [ 63.614573] cpu_startup_entry+0x45/0x50 [ 63.618619] ? setup_APIC_timer+0x220/0x220 [ 63.622921] start_secondary+0x39d/0x470 [ 63.626970] secondary_startup_64+0xa5/0xb0 [ 63.631276] Code: 75 29 48 c7 c7 fd 92 7d 8a 31 c0 e8 4d 68 86 ff 80 3c 25 e8 03 2c 8b 00 75 11 48 c7 c7 2d 93 7d 8a 31 c0 4c 89 fe e8 32 68 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 [ 63.650400] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff88021fd0eef8 [ 63.657495] ---[ end trace 9e4026c2dbad085a ]--- [ 63.662356] Kernel panic - not syncing: Fatal exception in interrupt [ 63.669394] Dumping ftrace buffer: [ 63.672915] (ftrace buffer empty) [ 63.676617] Kernel Offset: disabled [ 63.680243] Rebooting in 86400 seconds..