[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.906016][ T26] audit: type=1800 audit(1548083636.077:25): pid=7892 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.925899][ T26] audit: type=1800 audit(1548083636.077:26): pid=7892 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.955075][ T26] audit: type=1800 audit(1548083636.087:27): pid=7892 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.0.50' (ECDSA) to the list of known hosts. syzkaller login: [ 137.440538][ T8051] IPVS: ftp: loaded support on port[0] = 21 [ 137.442058][ T8052] IPVS: ftp: loaded support on port[0] = 21 [ 137.454494][ T8053] IPVS: ftp: loaded support on port[0] = 21 [ 137.456968][ T8054] IPVS: ftp: loaded support on port[0] = 21 [ 137.464432][ T8055] IPVS: ftp: loaded support on port[0] = 21 [ 137.470669][ T8056] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program [ 139.073262][ T30] WARNING: CPU: 1 PID: 30 at net/ipv6/xfrm6_tunnel.c:351 xfrm6_tunnel_net_exit+0x2cb/0x500 [ 139.083509][ T30] Kernel panic - not syncing: panic_on_warn set ... [ 139.090074][ T30] CPU: 1 PID: 30 Comm: kworker/u4:2 Not tainted 5.0.0-rc2-next-20190121 #16 [ 139.098723][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 139.108762][ T30] Workqueue: netns cleanup_net [ 139.113496][ T30] Call Trace: [ 139.116766][ T30] dump_stack+0x1db/0x2d0 [ 139.121071][ T30] ? dump_stack_print_info.cold+0x20/0x20 [ 139.126767][ T30] ? xfrm6_tunnel_net_exit+0x290/0x500 [ 139.132202][ T30] panic+0x2cb/0x65c [ 139.136074][ T30] ? add_taint.cold+0x16/0x16 [ 139.140731][ T30] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 139.146175][ T30] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 139.152388][ T30] ? __probe_kernel_read+0x1f4/0x250 [ 139.157648][ T30] ? __warn.cold+0x5/0x48 [ 139.161951][ T30] ? __warn+0xe8/0x1d0 [ 139.165998][ T30] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 139.171431][ T30] __warn.cold+0x20/0x48 [ 139.175654][ T30] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 139.181090][ T30] report_bug+0x263/0x2b0 [ 139.185403][ T30] do_error_trap+0x11b/0x200 [ 139.189979][ T30] do_invalid_op+0x37/0x50 [ 139.194373][ T30] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 139.199806][ T30] invalid_op+0x14/0x20 [ 139.203940][ T30] RIP: 0010:xfrm6_tunnel_net_exit+0x2cb/0x500 [ 139.209979][ T30] Code: 80 7d 00 00 4c 8b 3b 0f 85 f4 01 00 00 4d 89 7e 80 31 ff 4c 89 fe 41 c6 45 00 f8 e8 bf 31 9e fa 4d 85 ff 74 92 e8 15 30 9e fa <0f> 0b eb 89 48 8b 9d 30 ff ff ff 49 8d 46 a0 45 31 e4 49 89 c5 48 [ 139.229560][ T30] RSP: 0018:ffff8880a969f748 EFLAGS: 00010293 [ 139.235618][ T30] RAX: ffff8880a968e080 RBX: ffff888094221f38 RCX: ffffffff86e40931 [ 139.243720][ T30] RDX: 0000000000000000 RSI: ffffffff86e4093b RDI: 0000000000000007 [ 139.251669][ T30] RBP: ffff8880a969f828 R08: ffff8880a968e080 R09: ffff8880a968e970 [ 139.259614][ T30] R10: ffff8880a968e080 R11: 0000000000000000 R12: 00000000000000ff [ 139.267566][ T30] R13: ffffed10152d3ef0 R14: ffff8880a969f800 R15: ffff888091593780 [ 139.275525][ T30] ? xfrm6_tunnel_net_exit+0x2c1/0x500 [ 139.280959][ T30] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 139.286393][ T30] ? xfrm6_tunnel_net_exit+0x2cb/0x500 [ 139.291826][ T30] ? xfrm6_tunnel_alloc_spi+0xc60/0xc60 [ 139.297344][ T30] ? xt_proto_init+0x850/0x850 [ 139.302082][ T30] ? calibrate_delay+0xd35/0x1056 [ 139.307080][ T30] ? inet_frag_destroy_rcu+0xf0/0xf0 [ 139.312339][ T30] ? xfrm6_tunnel_alloc_spi+0xc60/0xc60 [ 139.317869][ T30] ops_exit_list.isra.0+0xb0/0x160 [ 139.322957][ T30] cleanup_net+0x51d/0xb10 [ 139.327350][ T30] ? find_held_lock+0x35/0x120 [ 139.332091][ T30] ? netns_install+0x1d0/0x1d0 [ 139.336833][ T30] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 139.343046][ T30] ? check_preemption_disabled+0x48/0x290 [ 139.348744][ T30] ? __lock_is_held+0xb6/0x140 [ 139.353494][ T30] process_one_work+0xd0c/0x1ce0 [ 139.358407][ T30] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 139.365229][ T30] ? __switch_to_asm+0x34/0x70 [ 139.369973][ T30] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 139.375317][ T30] ? __schedule+0x89f/0x1e60 [ 139.379887][ T30] ? pci_mmcfg_check_reserved+0x170/0x170 [ 139.385582][ T30] ? worker_thread+0x3b7/0x14a0 [ 139.390407][ T30] ? find_held_lock+0x35/0x120 [ 139.395146][ T30] ? lock_acquire+0x1db/0x570 [ 139.399799][ T30] ? worker_thread+0x3cd/0x14a0 [ 139.404627][ T30] ? kasan_check_write+0x14/0x20 [ 139.409539][ T30] ? do_raw_spin_lock+0x156/0x360 [ 139.414534][ T30] ? lock_release+0xc40/0xc40 [ 139.419183][ T30] ? rwlock_bug.part.0+0x90/0x90 [ 139.424111][ T30] ? trace_hardirqs_on_caller+0x310/0x310 [ 139.429810][ T30] worker_thread+0x143/0x14a0 [ 139.434470][ T30] ? process_one_work+0x1ce0/0x1ce0 [ 139.439640][ T30] ? __kthread_parkme+0xc3/0x1b0 [ 139.444550][ T30] ? lock_acquire+0x1db/0x570 [ 139.449199][ T30] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 139.454977][ T30] ? lockdep_hardirqs_on+0x415/0x5d0 [ 139.460233][ T30] ? trace_hardirqs_on+0xbd/0x310 [ 139.465246][ T30] ? __kthread_parkme+0xc3/0x1b0 [ 139.470157][ T30] ? trace_hardirqs_off_caller+0x300/0x300 [ 139.475934][ T30] ? do_raw_spin_trylock+0x270/0x270 [ 139.481190][ T30] ? schedule+0x108/0x350 [ 139.485503][ T30] ? do_raw_spin_trylock+0x270/0x270 [ 139.490772][ T30] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 139.496552][ T30] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 139.502769][ T30] ? __kthread_parkme+0xfb/0x1b0 [ 139.507680][ T30] kthread+0x357/0x430 [ 139.511729][ T30] ? process_one_work+0x1ce0/0x1ce0 [ 139.516900][ T30] ? kthread_stop+0x920/0x920 [ 139.521551][ T30] ret_from_fork+0x3a/0x50 [ 139.527193][ T30] Kernel Offset: disabled [ 139.531598][ T30] Rebooting in 86400 seconds..