[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.787755][ T27] audit: type=1800 audit(1563574471.207:25): pid=8901 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.809573][ T27] audit: type=1800 audit(1563574471.207:26): pid=8901 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.865402][ T27] audit: type=1800 audit(1563574471.207:27): pid=8901 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 '10.128.10.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.309260][ T9053] netlink: 4 bytes leftover after parsing attributes in process `syz-executor265'. [ 73.318696][ T9053] kasan: CONFIG_KASAN_INLINE enabled [ 73.324040][ T9053] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 73.332339][ T9053] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 73.339266][ T9053] CPU: 0 PID: 9053 Comm: syz-executor265 Not tainted 5.2.0-next-20190718 #41 [ 73.348004][ T9053] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.358057][ T9053] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 73.363402][ T9053] Code: 00 00 48 c7 c7 80 c0 da 88 e8 10 6e a1 fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c7 85 e8 fe ff ff 00 00 00 00 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e2 [ 73.382993][ T9053] RSP: 0018:ffff8880a635eeb8 EFLAGS: 00010246 [ 73.389037][ T9053] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11010f43179 [ 73.396985][ T9053] RDX: 0000000000000000 RSI: 1ffff11010f43180 RDI: 0000000000000282 [ 73.404932][ T9053] RBP: ffff8880a635f060 R08: 0000000000000002 R09: ffff888087a18bd0 [ 73.412894][ T9053] R10: fffffbfff134a3ff R11: ffffffff89a51fff R12: 0000000000000001 [ 73.420854][ T9053] R13: ffff88809b6156c0 R14: ffff8880a635f8c0 R15: 0000000000000000 [ 73.428822][ T9053] FS: 0000555556a5a880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 73.437728][ T9053] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.444286][ T9053] CR2: 0000000020000180 CR3: 000000008f593000 CR4: 00000000001406f0 [ 73.452235][ T9053] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.460182][ T9053] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.468128][ T9053] Call Trace: [ 73.471398][ T9053] ? tc_lookup_action_n+0xd2/0x100 [ 73.476500][ T9053] ? __add_metainfo+0x480/0x480 [ 73.481347][ T9053] ? tc_lookup_action_n+0xd2/0x100 [ 73.486433][ T9053] ? __kasan_check_read+0x11/0x20 [ 73.491436][ T9053] ? lock_downgrade+0x920/0x920 [ 73.496259][ T9053] ? __kasan_check_write+0x14/0x20 [ 73.501342][ T9053] ? do_raw_read_unlock+0x3f/0x70 [ 73.506341][ T9053] tcf_action_init_1+0x6f2/0xa80 [ 73.511259][ T9053] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.517471][ T9053] ? tcf_action_dump_old+0x80/0x80 [ 73.522559][ T9053] ? lock_downgrade+0x920/0x920 [ 73.527401][ T9053] ? __kasan_check_read+0x11/0x20 [ 73.532402][ T9053] ? mark_lock+0xc0/0x11e0 [ 73.536796][ T9053] tcf_action_init+0x241/0x360 [ 73.541540][ T9053] ? tcf_action_init_1+0xa80/0xa80 [ 73.546626][ T9053] ? mark_lock+0xc0/0x11e0 [ 73.551027][ T9053] ? mark_lock+0xc0/0x11e0 [ 73.555419][ T9053] ? __kasan_check_read+0x11/0x20 [ 73.560419][ T9053] tcf_action_add+0xe8/0x370 [ 73.565000][ T9053] ? tca_action_gd+0x1710/0x1710 [ 73.569928][ T9053] ? refcount_dec_not_one+0x1f0/0x1f0 [ 73.575280][ T9053] ? __nla_parse+0x43/0x60 [ 73.579845][ T9053] tc_ctl_action+0x3b5/0x4bc [ 73.584417][ T9053] ? tcf_action_add+0x370/0x370 [ 73.589248][ T9053] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.595459][ T9053] ? tcf_action_add+0x370/0x370 [ 73.600287][ T9053] rtnetlink_rcv_msg+0x463/0xb00 [ 73.605198][ T9053] ? rtnetlink_put_metrics+0x580/0x580 [ 73.610648][ T9053] ? lock_downgrade+0x920/0x920 [ 73.615492][ T9053] ? netlink_deliver_tap+0x22d/0xbf0 [ 73.620752][ T9053] ? find_held_lock+0x35/0x130 [ 73.625492][ T9053] netlink_rcv_skb+0x177/0x450 [ 73.630237][ T9053] ? rtnetlink_put_metrics+0x580/0x580 [ 73.635667][ T9053] ? netlink_ack+0xb30/0xb30 [ 73.640234][ T9053] ? __kasan_check_read+0x11/0x20 [ 73.645246][ T9053] ? netlink_deliver_tap+0x254/0xbf0 [ 73.650523][ T9053] rtnetlink_rcv+0x1d/0x30 [ 73.654912][ T9053] netlink_unicast+0x531/0x710 [ 73.659663][ T9053] ? netlink_attachskb+0x7c0/0x7c0 [ 73.664748][ T9053] ? _copy_from_iter_full+0x25d/0x8a0 [ 73.670097][ T9053] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 73.675807][ T9053] ? __check_object_size+0x3d/0x43c [ 73.680981][ T9053] netlink_sendmsg+0x8a5/0xd60 [ 73.685750][ T9053] ? netlink_unicast+0x710/0x710 [ 73.690675][ T9053] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 73.696203][ T9053] ? apparmor_socket_sendmsg+0x2a/0x30 [ 73.701642][ T9053] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.707873][ T9053] ? security_socket_sendmsg+0x8d/0xc0 [ 73.713308][ T9053] ? netlink_unicast+0x710/0x710 [ 73.718223][ T9053] sock_sendmsg+0xd7/0x130 [ 73.722619][ T9053] ___sys_sendmsg+0x803/0x920 [ 73.727268][ T9053] ? copy_msghdr_from_user+0x440/0x440 [ 73.732704][ T9053] ? prep_transhuge_page+0xa0/0xa0 [ 73.737793][ T9053] ? percpu_counter_add_batch+0x13c/0x190 [ 73.743491][ T9053] ? __do_page_fault+0x56a/0xdd0 [ 73.748412][ T9053] ? find_held_lock+0x35/0x130 [ 73.753148][ T9053] ? __do_page_fault+0x56a/0xdd0 [ 73.758064][ T9053] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.764288][ T9053] ? __fget_light+0x1a9/0x230 [ 73.768960][ T9053] ? __fdget+0x1b/0x20 [ 73.773007][ T9053] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 73.779228][ T9053] __sys_sendmsg+0x105/0x1d0 [ 73.783796][ T9053] ? __sys_sendmsg_sock+0xd0/0xd0 [ 73.788821][ T9053] ? down_read_non_owner+0x450/0x450 [ 73.794110][ T9053] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 73.799552][ T9053] ? do_syscall_64+0x26/0x6a0 [ 73.804207][ T9053] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.810249][ T9053] ? do_syscall_64+0x26/0x6a0 [ 73.814908][ T9053] __x64_sys_sendmsg+0x78/0xb0 [ 73.819651][ T9053] do_syscall_64+0xfd/0x6a0 [ 73.824135][ T9053] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.830005][ T9053] RIP: 0033:0x4401d9 [ 73.833877][ T9053] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 73.853463][ T9053] RSP: 002b:00007ffc73984da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 73.861854][ T9053] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 73.869802][ T9053] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 73.877784][ T9053] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 73.885749][ T9053] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 73.893718][ T9053] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 73.901671][ T9053] Modules linked in: [ 73.906370][ T9053] ---[ end trace e9e534461e26400d ]--- [ 73.912074][ T9053] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 73.917442][ T9053] Code: 00 00 48 c7 c7 80 c0 da 88 e8 10 6e a1 fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c7 85 e8 fe ff ff 00 00 00 00 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e2 [ 73.937075][ T9053] RSP: 0018:ffff8880a635eeb8 EFLAGS: 00010246 [ 73.943156][ T9053] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11010f43179 [ 73.951144][ T9053] RDX: 0000000000000000 RSI: 1ffff11010f43180 RDI: 0000000000000282 [ 73.959130][ T9053] RBP: ffff8880a635f060 R08: 0000000000000002 R09: ffff888087a18bd0 [ 73.967099][ T9053] R10: fffffbfff134a3ff R11: ffffffff89a51fff R12: 0000000000000001 [ 73.975090][ T9053] R13: ffff88809b6156c0 R14: ffff8880a635f8c0 R15: 0000000000000000 [ 73.983072][ T9053] FS: 0000555556a5a880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 73.992032][ T9053] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.998628][ T9053] CR2: 0000000020000180 CR3: 000000008f593000 CR4: 00000000001406f0 [ 74.006607][ T9053] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.014601][ T9053] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.022602][ T9053] Kernel panic - not syncing: Fatal exception [ 74.029659][ T9053] Kernel Offset: disabled [ 74.033980][ T9053] Rebooting in 86400 seconds..