[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.158633][ T27] audit: type=1800 audit(1563576025.705:25): pid=8698 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.205560][ T27] audit: type=1800 audit(1563576025.705:26): pid=8698 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.249242][ T27] audit: type=1800 audit(1563576025.715:27): pid=8698 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. executing program syzkaller login: [ 77.612590][ T8850] netlink: 4 bytes leftover after parsing attributes in process `syz-executor767'. [ 77.622117][ T8850] kasan: CONFIG_KASAN_INLINE enabled [ 77.627507][ T8850] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 77.635607][ T8850] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 77.642524][ T8850] CPU: 1 PID: 8850 Comm: syz-executor767 Not tainted 5.2.0+ #67 [ 77.650127][ T8850] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.660216][ T8850] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 77.665746][ T8850] Code: 00 00 48 c7 c7 80 bf da 88 e8 c0 6d 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 [ 77.685501][ T8850] RSP: 0018:ffff88808bceeeb8 EFLAGS: 00010246 [ 77.691555][ T8850] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11015015928 [ 77.699510][ T8850] RDX: 0000000000000000 RSI: 1ffff1101501592f RDI: 0000000000000286 [ 77.707464][ T8850] RBP: ffff88808bcef060 R08: 0000000000000002 R09: ffff8880a80ac948 [ 77.715416][ T8850] R10: fffffbfff1349ef7 R11: ffffffff89a4f7bf R12: 0000000000000001 [ 77.723380][ T8850] R13: ffff88809b691b40 R14: ffff88808bcef8c0 R15: 0000000000000000 [ 77.731335][ T8850] FS: 0000555556f8e880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 77.740321][ T8850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.746889][ T8850] CR2: 0000000020000180 CR3: 000000008fe46000 CR4: 00000000001406e0 [ 77.754842][ T8850] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.762792][ T8850] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.770736][ T8850] Call Trace: [ 77.774010][ T8850] ? tc_lookup_action_n+0xd2/0x100 [ 77.779109][ T8850] ? __add_metainfo+0x480/0x480 [ 77.783938][ T8850] ? tc_lookup_action_n+0xd2/0x100 [ 77.789034][ T8850] ? __kasan_check_read+0x11/0x20 [ 77.794039][ T8850] ? lock_downgrade+0x920/0x920 [ 77.798865][ T8850] ? __kasan_check_write+0x14/0x20 [ 77.803962][ T8850] ? do_raw_read_unlock+0x3f/0x70 [ 77.808968][ T8850] tcf_action_init_1+0x6f2/0xa80 [ 77.813882][ T8850] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.820104][ T8850] ? tcf_action_dump_old+0x80/0x80 [ 77.825194][ T8850] ? lock_downgrade+0x920/0x920 [ 77.830020][ T8850] ? __kasan_check_read+0x11/0x20 [ 77.835025][ T8850] ? mark_lock+0xc0/0x11e0 [ 77.839436][ T8850] tcf_action_init+0x241/0x360 [ 77.844181][ T8850] ? tcf_action_init_1+0xa80/0xa80 [ 77.849312][ T8850] ? mark_lock+0xc0/0x11e0 [ 77.853717][ T8850] ? mark_lock+0xc0/0x11e0 [ 77.858115][ T8850] ? __kasan_check_read+0x11/0x20 [ 77.863116][ T8850] tcf_action_add+0xe8/0x370 [ 77.867683][ T8850] ? tca_action_gd+0x1710/0x1710 [ 77.872596][ T8850] ? refcount_dec_not_one+0x1f0/0x1f0 [ 77.877958][ T8850] ? __nla_parse+0x43/0x60 [ 77.882352][ T8850] tc_ctl_action+0x3b5/0x4bc [ 77.886922][ T8850] ? tcf_action_add+0x370/0x370 [ 77.891797][ T8850] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.898019][ T8850] ? tcf_action_add+0x370/0x370 [ 77.902946][ T8850] rtnetlink_rcv_msg+0x463/0xb00 [ 77.907871][ T8850] ? rtnetlink_put_metrics+0x580/0x580 [ 77.913317][ T8850] ? lock_downgrade+0x920/0x920 [ 77.918143][ T8850] ? netlink_deliver_tap+0x22d/0xbf0 [ 77.923411][ T8850] ? find_held_lock+0x35/0x130 [ 77.928156][ T8850] netlink_rcv_skb+0x177/0x450 [ 77.932895][ T8850] ? rtnetlink_put_metrics+0x580/0x580 [ 77.938333][ T8850] ? netlink_ack+0xb30/0xb30 [ 77.942902][ T8850] ? __kasan_check_read+0x11/0x20 [ 77.947904][ T8850] ? netlink_deliver_tap+0x254/0xbf0 [ 77.953174][ T8850] rtnetlink_rcv+0x1d/0x30 [ 77.957572][ T8850] netlink_unicast+0x531/0x710 [ 77.962310][ T8850] ? netlink_attachskb+0x7c0/0x7c0 [ 77.967505][ T8850] ? _copy_from_iter_full+0x25d/0x8a0 [ 77.972869][ T8850] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 77.978570][ T8850] ? __check_object_size+0x3d/0x43c [ 77.983742][ T8850] netlink_sendmsg+0x8a5/0xd60 [ 77.988483][ T8850] ? netlink_unicast+0x710/0x710 [ 77.993394][ T8850] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 77.998915][ T8850] ? apparmor_socket_sendmsg+0x2a/0x30 [ 78.004511][ T8850] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.010737][ T8850] ? security_socket_sendmsg+0x8d/0xc0 [ 78.016215][ T8850] ? netlink_unicast+0x710/0x710 [ 78.021141][ T8850] sock_sendmsg+0xd7/0x130 [ 78.025539][ T8850] ___sys_sendmsg+0x803/0x920 [ 78.030194][ T8850] ? copy_msghdr_from_user+0x440/0x440 [ 78.035632][ T8850] ? prep_transhuge_page+0xa0/0xa0 [ 78.040827][ T8850] ? percpu_counter_add_batch+0x13c/0x190 [ 78.046554][ T8850] ? __do_page_fault+0x56a/0xdd0 [ 78.051466][ T8850] ? find_held_lock+0x35/0x130 [ 78.056205][ T8850] ? __do_page_fault+0x56a/0xdd0 [ 78.061230][ T8850] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.067456][ T8850] ? __fget_light+0x1a9/0x230 [ 78.072175][ T8850] ? __fdget+0x1b/0x20 [ 78.076297][ T8850] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 78.082528][ T8850] __sys_sendmsg+0x105/0x1d0 [ 78.087097][ T8850] ? __sys_sendmsg_sock+0xd0/0xd0 [ 78.092096][ T8850] ? down_read_non_owner+0x450/0x450 [ 78.097473][ T8850] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 78.102975][ T8850] ? do_syscall_64+0x26/0x6a0 [ 78.107634][ T8850] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.113781][ T8850] ? do_syscall_64+0x26/0x6a0 [ 78.118440][ T8850] __x64_sys_sendmsg+0x78/0xb0 [ 78.123178][ T8850] do_syscall_64+0xfd/0x6a0 [ 78.127722][ T8850] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.133603][ T8850] RIP: 0033:0x4401d9 [ 78.137479][ T8850] 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 [ 78.157159][ T8850] RSP: 002b:00007fff9d3f9f98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 78.165543][ T8850] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 78.173491][ T8850] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 78.181435][ T8850] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 78.189380][ T8850] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 78.197323][ T8850] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 78.205270][ T8850] Modules linked in: [ 78.209697][ T8850] ---[ end trace 2bd375bb2be44463 ]--- [ 78.215166][ T8850] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 78.220698][ T8850] Code: 00 00 48 c7 c7 80 bf da 88 e8 c0 6d 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 [ 78.240523][ T8850] RSP: 0018:ffff88808bceeeb8 EFLAGS: 00010246 [ 78.246709][ T8850] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11015015928 [ 78.254888][ T8850] RDX: 0000000000000000 RSI: 1ffff1101501592f RDI: 0000000000000286 [ 78.262887][ T8850] RBP: ffff88808bcef060 R08: 0000000000000002 R09: ffff8880a80ac948 [ 78.270871][ T8850] R10: fffffbfff1349ef7 R11: ffffffff89a4f7bf R12: 0000000000000001 [ 78.278989][ T8850] R13: ffff88809b691b40 R14: ffff88808bcef8c0 R15: 0000000000000000 [ 78.286983][ T8850] FS: 0000555556f8e880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 78.295939][ T8850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.302793][ T8850] CR2: 0000000020000180 CR3: 000000008fe46000 CR4: 00000000001406e0 [ 78.310800][ T8850] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.319017][ T8850] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.326999][ T8850] Kernel panic - not syncing: Fatal exception [ 78.334073][ T8850] Kernel Offset: disabled [ 78.338401][ T8850] Rebooting in 86400 seconds..