[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.651997][ T26] audit: type=1800 audit(1563579666.746:25): pid=8787 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.701256][ T26] audit: type=1800 audit(1563579666.746:26): pid=8787 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.723150][ T26] audit: type=1800 audit(1563579666.746:27): pid=8787 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 '10.128.0.48' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.552241][ T8939] netlink: 4 bytes leftover after parsing attributes in process `syz-executor128'. [ 68.561649][ T8939] kasan: CONFIG_KASAN_INLINE enabled [ 68.567060][ T8939] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 68.575146][ T8939] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 68.582059][ T8939] CPU: 1 PID: 8939 Comm: syz-executor128 Not tainted 5.2.0-next-20190718 #41 [ 68.590807][ T8939] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.600879][ T8939] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 68.606244][ T8939] 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 [ 68.625827][ T8939] RSP: 0018:ffff88808cf3eeb8 EFLAGS: 00010246 [ 68.631886][ T8939] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11012c065d9 [ 68.639852][ T8939] RDX: 0000000000000000 RSI: 1ffff11012c065e0 RDI: 0000000000000282 [ 68.647802][ T8939] RBP: ffff88808cf3f060 R08: 0000000000000002 R09: ffff888096032ed0 [ 68.655746][ T8939] R10: fffffbfff134a3ff R11: ffffffff89a51fff R12: 0000000000000001 [ 68.663697][ T8939] R13: ffff88809b62ad80 R14: ffff88808cf3f8c0 R15: 0000000000000000 [ 68.671645][ T8939] FS: 0000555556e22880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 68.680565][ T8939] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.687137][ T8939] CR2: 0000000020000180 CR3: 00000000992c7000 CR4: 00000000001406e0 [ 68.695087][ T8939] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.703056][ T8939] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.711005][ T8939] Call Trace: [ 68.714284][ T8939] ? tc_lookup_action_n+0xd2/0x100 [ 68.719370][ T8939] ? __add_metainfo+0x480/0x480 [ 68.724197][ T8939] ? tc_lookup_action_n+0xd2/0x100 [ 68.729284][ T8939] ? __kasan_check_read+0x11/0x20 [ 68.734304][ T8939] ? lock_downgrade+0x920/0x920 [ 68.739135][ T8939] ? __kasan_check_write+0x14/0x20 [ 68.744222][ T8939] ? do_raw_read_unlock+0x3f/0x70 [ 68.749225][ T8939] tcf_action_init_1+0x6f2/0xa80 [ 68.754139][ T8939] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.760354][ T8939] ? tcf_action_dump_old+0x80/0x80 [ 68.765441][ T8939] ? lock_downgrade+0x920/0x920 [ 68.770273][ T8939] ? __kasan_check_read+0x11/0x20 [ 68.775287][ T8939] ? mark_lock+0xc0/0x11e0 [ 68.779699][ T8939] tcf_action_init+0x241/0x360 [ 68.784438][ T8939] ? tcf_action_init_1+0xa80/0xa80 [ 68.789522][ T8939] ? mark_lock+0xc0/0x11e0 [ 68.793938][ T8939] ? mark_lock+0xc0/0x11e0 [ 68.798332][ T8939] ? __kasan_check_read+0x11/0x20 [ 68.803330][ T8939] tcf_action_add+0xe8/0x370 [ 68.807897][ T8939] ? tca_action_gd+0x1710/0x1710 [ 68.812808][ T8939] ? refcount_dec_not_one+0x1f0/0x1f0 [ 68.818195][ T8939] ? __nla_parse+0x43/0x60 [ 68.822587][ T8939] tc_ctl_action+0x3b5/0x4bc [ 68.827170][ T8939] ? tcf_action_add+0x370/0x370 [ 68.832016][ T8939] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.838247][ T8939] ? tcf_action_add+0x370/0x370 [ 68.843074][ T8939] rtnetlink_rcv_msg+0x463/0xb00 [ 68.847991][ T8939] ? rtnetlink_put_metrics+0x580/0x580 [ 68.853425][ T8939] ? lock_downgrade+0x920/0x920 [ 68.858253][ T8939] ? netlink_deliver_tap+0x22d/0xbf0 [ 68.863540][ T8939] ? find_held_lock+0x35/0x130 [ 68.868300][ T8939] netlink_rcv_skb+0x177/0x450 [ 68.873062][ T8939] ? rtnetlink_put_metrics+0x580/0x580 [ 68.878509][ T8939] ? netlink_ack+0xb30/0xb30 [ 68.883076][ T8939] ? __kasan_check_read+0x11/0x20 [ 68.888077][ T8939] ? netlink_deliver_tap+0x254/0xbf0 [ 68.893335][ T8939] rtnetlink_rcv+0x1d/0x30 [ 68.897728][ T8939] netlink_unicast+0x531/0x710 [ 68.902467][ T8939] ? netlink_attachskb+0x7c0/0x7c0 [ 68.907553][ T8939] ? _copy_from_iter_full+0x25d/0x8a0 [ 68.912917][ T8939] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 68.918616][ T8939] ? __check_object_size+0x3d/0x43c [ 68.923791][ T8939] netlink_sendmsg+0x8a5/0xd60 [ 68.928534][ T8939] ? netlink_unicast+0x710/0x710 [ 68.933446][ T8939] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 68.938967][ T8939] ? apparmor_socket_sendmsg+0x2a/0x30 [ 68.944402][ T8939] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.950740][ T8939] ? security_socket_sendmsg+0x8d/0xc0 [ 68.956175][ T8939] ? netlink_unicast+0x710/0x710 [ 68.961090][ T8939] sock_sendmsg+0xd7/0x130 [ 68.965481][ T8939] ___sys_sendmsg+0x803/0x920 [ 68.970134][ T8939] ? copy_msghdr_from_user+0x440/0x440 [ 68.975572][ T8939] ? prep_transhuge_page+0xa0/0xa0 [ 68.980661][ T8939] ? percpu_counter_add_batch+0x13c/0x190 [ 68.986382][ T8939] ? __do_page_fault+0x56a/0xdd0 [ 68.991311][ T8939] ? find_held_lock+0x35/0x130 [ 68.996056][ T8939] ? __do_page_fault+0x56a/0xdd0 [ 69.000972][ T8939] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.007291][ T8939] ? __fget_light+0x1a9/0x230 [ 69.011943][ T8939] ? __fdget+0x1b/0x20 [ 69.015995][ T8939] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 69.022226][ T8939] __sys_sendmsg+0x105/0x1d0 [ 69.026813][ T8939] ? __sys_sendmsg_sock+0xd0/0xd0 [ 69.031813][ T8939] ? down_read_non_owner+0x450/0x450 [ 69.037091][ T8939] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.042523][ T8939] ? do_syscall_64+0x26/0x6a0 [ 69.047190][ T8939] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.053229][ T8939] ? do_syscall_64+0x26/0x6a0 [ 69.057888][ T8939] __x64_sys_sendmsg+0x78/0xb0 [ 69.062628][ T8939] do_syscall_64+0xfd/0x6a0 [ 69.067111][ T8939] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.072977][ T8939] RIP: 0033:0x4401d9 [ 69.076851][ T8939] 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 [ 69.096431][ T8939] RSP: 002b:00007ffe97bc9278 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 69.104821][ T8939] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 69.112776][ T8939] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 69.120727][ T8939] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 69.128677][ T8939] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 69.136658][ T8939] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 69.144623][ T8939] Modules linked in: [ 69.149287][ T8939] ---[ end trace a415defc317898a2 ]--- [ 69.154763][ T8939] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 69.160293][ T8939] 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 [ 69.179957][ T8939] RSP: 0018:ffff88808cf3eeb8 EFLAGS: 00010246 [ 69.186058][ T8939] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11012c065d9 [ 69.194024][ T8939] RDX: 0000000000000000 RSI: 1ffff11012c065e0 RDI: 0000000000000282 [ 69.202012][ T8939] RBP: ffff88808cf3f060 R08: 0000000000000002 R09: ffff888096032ed0 [ 69.210012][ T8939] R10: fffffbfff134a3ff R11: ffffffff89a51fff R12: 0000000000000001 [ 69.218002][ T8939] R13: ffff88809b62ad80 R14: ffff88808cf3f8c0 R15: 0000000000000000 [ 69.226008][ T8939] FS: 0000555556e22880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 69.234932][ T8939] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.241537][ T8939] CR2: 0000000020000180 CR3: 00000000992c7000 CR4: 00000000001406e0 [ 69.249538][ T8939] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.257530][ T8939] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.265497][ T8939] Kernel panic - not syncing: Fatal exception [ 69.272621][ T8939] Kernel Offset: disabled [ 69.276943][ T8939] Rebooting in 86400 seconds..