[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.692018][ T26] audit: type=1800 audit(1563571062.047:25): pid=8932 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.736902][ T26] audit: type=1800 audit(1563571062.057:26): pid=8932 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.776003][ T26] audit: type=1800 audit(1563571062.057:27): pid=8932 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 '10.128.0.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.258306][ T9083] netlink: 4 bytes leftover after parsing attributes in process `syz-executor894'. [ 72.268062][ T9083] kasan: CONFIG_KASAN_INLINE enabled [ 72.273386][ T9083] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 72.281893][ T9083] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 72.289475][ T9083] CPU: 1 PID: 9083 Comm: syz-executor894 Not tainted 5.2.0+ #69 [ 72.297079][ T9083] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.307121][ T9083] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 72.312471][ T9083] Code: 00 00 48 c7 c7 40 c2 da 88 e8 f0 8c a2 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 [ 72.332075][ T9083] RSP: 0018:ffff88808935eeb8 EFLAGS: 00010246 [ 72.338120][ T9083] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110141b01c0 [ 72.346071][ T9083] RDX: 0000000000000000 RSI: 1ffff110141b01c7 RDI: 0000000000000282 [ 72.354024][ T9083] RBP: ffff88808935f060 R08: 0000000000000002 R09: ffff8880a0d80e08 [ 72.361975][ T9083] R10: fffffbfff134a0cf R11: ffffffff89a5067f R12: 0000000000000001 [ 72.369933][ T9083] R13: ffff8882162e6d80 R14: ffff88808935f8c0 R15: 0000000000000000 [ 72.377886][ T9083] FS: 0000555555f3b880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 72.386793][ T9083] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.393352][ T9083] CR2: 0000000020000180 CR3: 000000009f025000 CR4: 00000000001406e0 [ 72.401317][ T9083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.409265][ T9083] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.417212][ T9083] Call Trace: [ 72.420482][ T9083] ? tc_lookup_action_n+0xd2/0x100 [ 72.425573][ T9083] ? __add_metainfo+0x480/0x480 [ 72.430409][ T9083] ? tc_lookup_action_n+0xd2/0x100 [ 72.435500][ T9083] ? __kasan_check_read+0x11/0x20 [ 72.440553][ T9083] ? lock_downgrade+0x920/0x920 [ 72.445382][ T9083] ? __kasan_check_write+0x14/0x20 [ 72.450469][ T9083] ? do_raw_read_unlock+0x3f/0x70 [ 72.455469][ T9083] tcf_action_init_1+0x6f2/0xa80 [ 72.460387][ T9083] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.466621][ T9083] ? tcf_action_dump_old+0x80/0x80 [ 72.471759][ T9083] ? lock_downgrade+0x920/0x920 [ 72.476590][ T9083] ? __kasan_check_read+0x11/0x20 [ 72.481589][ T9083] ? mark_lock+0xc0/0x11e0 [ 72.485984][ T9083] tcf_action_init+0x241/0x360 [ 72.490722][ T9083] ? tcf_action_init_1+0xa80/0xa80 [ 72.495973][ T9083] ? mark_lock+0xc0/0x11e0 [ 72.500373][ T9083] ? mark_lock+0xc0/0x11e0 [ 72.504763][ T9083] ? __kasan_check_read+0x11/0x20 [ 72.509764][ T9083] tcf_action_add+0xe8/0x370 [ 72.514441][ T9083] ? tca_action_gd+0x1710/0x1710 [ 72.519352][ T9083] ? refcount_dec_not_one+0x1f0/0x1f0 [ 72.524721][ T9083] ? __nla_parse+0x43/0x60 [ 72.529114][ T9083] tc_ctl_action+0x3b5/0x4bc [ 72.533678][ T9083] ? tcf_action_add+0x370/0x370 [ 72.538526][ T9083] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.544738][ T9083] ? tcf_action_add+0x370/0x370 [ 72.549568][ T9083] rtnetlink_rcv_msg+0x463/0xb00 [ 72.554480][ T9083] ? rtnetlink_put_metrics+0x580/0x580 [ 72.559912][ T9083] ? lock_downgrade+0x920/0x920 [ 72.564734][ T9083] ? netlink_deliver_tap+0x22d/0xbf0 [ 72.569994][ T9083] ? find_held_lock+0x35/0x130 [ 72.574734][ T9083] netlink_rcv_skb+0x177/0x450 [ 72.579477][ T9083] ? rtnetlink_put_metrics+0x580/0x580 [ 72.584908][ T9083] ? netlink_ack+0xb30/0xb30 [ 72.589487][ T9083] ? __kasan_check_read+0x11/0x20 [ 72.594497][ T9083] ? netlink_deliver_tap+0x254/0xbf0 [ 72.599760][ T9083] rtnetlink_rcv+0x1d/0x30 [ 72.604151][ T9083] netlink_unicast+0x531/0x710 [ 72.608891][ T9083] ? netlink_attachskb+0x7c0/0x7c0 [ 72.613992][ T9083] ? _copy_from_iter_full+0x25d/0x8a0 [ 72.619360][ T9083] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 72.625070][ T9083] ? __check_object_size+0x3d/0x43c [ 72.630248][ T9083] netlink_sendmsg+0x8a5/0xd60 [ 72.634988][ T9083] ? netlink_unicast+0x710/0x710 [ 72.639907][ T9083] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 72.645441][ T9083] ? apparmor_socket_sendmsg+0x2a/0x30 [ 72.650877][ T9083] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.657095][ T9083] ? security_socket_sendmsg+0x8d/0xc0 [ 72.662530][ T9083] ? netlink_unicast+0x710/0x710 [ 72.667444][ T9083] sock_sendmsg+0xd7/0x130 [ 72.671838][ T9083] ___sys_sendmsg+0x803/0x920 [ 72.676492][ T9083] ? copy_msghdr_from_user+0x440/0x440 [ 72.681927][ T9083] ? prep_transhuge_page+0xa0/0xa0 [ 72.687013][ T9083] ? percpu_counter_add_batch+0x13c/0x190 [ 72.692708][ T9083] ? __do_page_fault+0x56a/0xdd0 [ 72.697621][ T9083] ? find_held_lock+0x35/0x130 [ 72.702358][ T9083] ? __do_page_fault+0x56a/0xdd0 [ 72.707274][ T9083] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.713502][ T9083] ? __fget_light+0x1a9/0x230 [ 72.718151][ T9083] ? __fdget+0x1b/0x20 [ 72.722199][ T9083] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 72.728418][ T9083] __sys_sendmsg+0x105/0x1d0 [ 72.732982][ T9083] ? __sys_sendmsg_sock+0xd0/0xd0 [ 72.737983][ T9083] ? down_read_non_owner+0x450/0x450 [ 72.743246][ T9083] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 72.748698][ T9083] ? do_syscall_64+0x26/0x6a0 [ 72.753347][ T9083] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.759389][ T9083] ? do_syscall_64+0x26/0x6a0 [ 72.764048][ T9083] __x64_sys_sendmsg+0x78/0xb0 [ 72.768789][ T9083] do_syscall_64+0xfd/0x6a0 [ 72.773265][ T9083] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.779336][ T9083] RIP: 0033:0x4401d9 [ 72.783215][ T9083] 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 [ 72.802814][ T9083] RSP: 002b:00007ffe87e07328 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 72.811209][ T9083] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 72.819159][ T9083] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 72.827107][ T9083] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 72.835061][ T9083] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 72.843010][ T9083] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 72.850959][ T9083] Modules linked in: [ 72.854932][ T9083] ---[ end trace d4a0e5050c892e03 ]--- [ 72.860468][ T9083] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 72.865861][ T9083] Code: 00 00 48 c7 c7 40 c2 da 88 e8 f0 8c a2 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 [ 72.885505][ T9083] RSP: 0018:ffff88808935eeb8 EFLAGS: 00010246 [ 72.891583][ T9083] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110141b01c0 [ 72.899566][ T9083] RDX: 0000000000000000 RSI: 1ffff110141b01c7 RDI: 0000000000000282 [ 72.907565][ T9083] RBP: ffff88808935f060 R08: 0000000000000002 R09: ffff8880a0d80e08 [ 72.915544][ T9083] R10: fffffbfff134a0cf R11: ffffffff89a5067f R12: 0000000000000001 [ 72.923531][ T9083] R13: ffff8882162e6d80 R14: ffff88808935f8c0 R15: 0000000000000000 [ 72.931517][ T9083] FS: 0000555555f3b880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 72.940459][ T9083] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.947058][ T9083] CR2: 0000000020000180 CR3: 000000009f025000 CR4: 00000000001406e0 [ 72.955012][ T9083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.963441][ T9083] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.971457][ T9083] Kernel panic - not syncing: Fatal exception [ 72.978416][ T9083] Kernel Offset: disabled [ 72.982737][ T9083] Rebooting in 86400 seconds..