[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.100425][ T26] audit: type=1800 audit(1563570748.330:25): pid=8642 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.140859][ T26] audit: type=1800 audit(1563570748.330:26): pid=8642 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.179394][ T26] audit: type=1800 audit(1563570748.330:27): pid=8642 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 '10.128.0.169' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.403120][ T8793] netlink: 4 bytes leftover after parsing attributes in process `syz-executor010'. [ 63.412716][ T8793] kasan: CONFIG_KASAN_INLINE enabled [ 63.418038][ T8793] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 63.426335][ T8793] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 63.433268][ T8793] CPU: 1 PID: 8793 Comm: syz-executor010 Not tainted 5.2.0+ #93 [ 63.440988][ T8793] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.451159][ T8793] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 63.456516][ T8793] Code: 00 00 48 c7 c7 c0 aa da 88 e8 40 13 a9 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 [ 63.476309][ T8793] RSP: 0018:ffff8880913e6eb8 EFLAGS: 00010246 [ 63.482352][ T8793] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11012ae4d10 [ 63.490315][ T8793] RDX: 0000000000000000 RSI: 1ffff11012ae4d17 RDI: 0000000000000286 [ 63.498364][ T8793] RBP: ffff8880913e7060 R08: 0000000000000002 R09: ffff888095726888 [ 63.506311][ T8793] R10: fffffbfff1345337 R11: ffffffff89a299bf R12: 0000000000000001 [ 63.514287][ T8793] R13: ffff888216132dc0 R14: ffff8880913e78c0 R15: 0000000000000000 [ 63.522328][ T8793] FS: 00005555569b4880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 63.531230][ T8793] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.537797][ T8793] CR2: 0000000020000180 CR3: 000000008f0ca000 CR4: 00000000001406e0 [ 63.545749][ T8793] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.553697][ T8793] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.561643][ T8793] Call Trace: [ 63.564932][ T8793] ? tc_lookup_action_n+0xd2/0x100 [ 63.570034][ T8793] ? __add_metainfo+0x480/0x480 [ 63.574881][ T8793] ? tc_lookup_action_n+0xd2/0x100 [ 63.580243][ T8793] ? lock_downgrade+0x920/0x920 [ 63.585397][ T8793] ? __kasan_check_write+0x14/0x20 [ 63.590696][ T8793] ? do_raw_read_unlock+0x3f/0x70 [ 63.595706][ T8793] tcf_action_init_1+0x6f2/0xa80 [ 63.600632][ T8793] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.606865][ T8793] ? tcf_action_dump_old+0x80/0x80 [ 63.611957][ T8793] ? lock_downgrade+0x920/0x920 [ 63.616797][ T8793] ? __kasan_check_read+0x11/0x20 [ 63.621797][ T8793] ? mark_lock+0xc0/0x11e0 [ 63.626193][ T8793] tcf_action_init+0x241/0x360 [ 63.630943][ T8793] ? tcf_action_init_1+0xa80/0xa80 [ 63.636349][ T8793] ? mark_lock+0xc0/0x11e0 [ 63.640776][ T8793] ? mark_lock+0xc0/0x11e0 [ 63.645182][ T8793] ? __kasan_check_read+0x11/0x20 [ 63.650189][ T8793] tcf_action_add+0xe8/0x370 [ 63.654761][ T8793] ? tca_action_gd+0x1730/0x1730 [ 63.659678][ T8793] ? refcount_dec_not_one+0x1f0/0x1f0 [ 63.665039][ T8793] ? __nla_parse+0x43/0x60 [ 63.669431][ T8793] tc_ctl_action+0x3b5/0x4bc [ 63.674000][ T8793] ? tcf_action_add+0x370/0x370 [ 63.678941][ T8793] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.685156][ T8793] ? tcf_action_add+0x370/0x370 [ 63.689999][ T8793] rtnetlink_rcv_msg+0x463/0xb00 [ 63.694914][ T8793] ? rtnetlink_put_metrics+0x590/0x590 [ 63.700364][ T8793] ? lock_downgrade+0x920/0x920 [ 63.706079][ T8793] ? netlink_deliver_tap+0x22d/0xbf0 [ 63.711696][ T8793] ? find_held_lock+0x35/0x130 [ 63.716441][ T8793] netlink_rcv_skb+0x177/0x450 [ 63.721191][ T8793] ? rtnetlink_put_metrics+0x590/0x590 [ 63.726644][ T8793] ? netlink_ack+0xb50/0xb50 [ 63.731213][ T8793] ? __kasan_check_read+0x11/0x20 [ 63.736213][ T8793] ? netlink_deliver_tap+0x254/0xbf0 [ 63.741475][ T8793] rtnetlink_rcv+0x1d/0x30 [ 63.745867][ T8793] netlink_unicast+0x531/0x710 [ 63.750616][ T8793] ? netlink_attachskb+0x7c0/0x7c0 [ 63.755706][ T8793] ? _copy_from_iter_full+0x25d/0x8c0 [ 63.761166][ T8793] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 63.766877][ T8793] ? __check_object_size+0x3d/0x43c [ 63.772058][ T8793] netlink_sendmsg+0x8ae/0xd70 [ 63.776809][ T8793] ? netlink_unicast+0x710/0x710 [ 63.781743][ T8793] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 63.787266][ T8793] ? apparmor_socket_sendmsg+0x2a/0x30 [ 63.792703][ T8793] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.798935][ T8793] ? security_socket_sendmsg+0x8d/0xc0 [ 63.804382][ T8793] ? netlink_unicast+0x710/0x710 [ 63.809296][ T8793] sock_sendmsg+0xd7/0x130 [ 63.813691][ T8793] ___sys_sendmsg+0x803/0x920 [ 63.818343][ T8793] ? copy_msghdr_from_user+0x440/0x440 [ 63.823785][ T8793] ? prep_transhuge_page+0xa0/0xa0 [ 63.828888][ T8793] ? __lock_acquire+0x8a0/0x4690 [ 63.833808][ T8793] ? percpu_counter_add_batch+0x13c/0x190 [ 63.839518][ T8793] ? __do_page_fault+0x56a/0xdd0 [ 63.844451][ T8793] ? find_held_lock+0x35/0x130 [ 63.849208][ T8793] ? __do_page_fault+0x56a/0xdd0 [ 63.854164][ T8793] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.860396][ T8793] ? __fget_light+0x1a9/0x230 [ 63.865067][ T8793] ? __fdget+0x1b/0x20 [ 63.869112][ T8793] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 63.875335][ T8793] __sys_sendmsg+0x105/0x1d0 [ 63.879915][ T8793] ? __sys_sendmsg_sock+0xd0/0xd0 [ 63.884916][ T8793] ? down_read_non_owner+0x450/0x450 [ 63.890178][ T8793] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 63.895629][ T8793] ? do_syscall_64+0x26/0x6a0 [ 63.900297][ T8793] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.906338][ T8793] ? do_syscall_64+0x26/0x6a0 [ 63.911011][ T8793] __x64_sys_sendmsg+0x78/0xb0 [ 63.915754][ T8793] do_syscall_64+0xfd/0x6a0 [ 63.920233][ T8793] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.926116][ T8793] RIP: 0033:0x4401d9 [ 63.929989][ T8793] 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 [ 63.949569][ T8793] RSP: 002b:00007ffca0afb018 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.957975][ T8793] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 63.965923][ T8793] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 63.973868][ T8793] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 63.981816][ T8793] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 63.989762][ T8793] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 63.997712][ T8793] Modules linked in: [ 64.002483][ T8793] ---[ end trace 9f43add0ffd78f5a ]--- [ 64.007951][ T8793] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 64.013353][ T8793] Code: 00 00 48 c7 c7 c0 aa da 88 e8 40 13 a9 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 [ 64.033198][ T8793] RSP: 0018:ffff8880913e6eb8 EFLAGS: 00010246 [ 64.039242][ T8793] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11012ae4d10 [ 64.047223][ T8793] RDX: 0000000000000000 RSI: 1ffff11012ae4d17 RDI: 0000000000000286 [ 64.055206][ T8793] RBP: ffff8880913e7060 R08: 0000000000000002 R09: ffff888095726888 [ 64.063196][ T8793] R10: fffffbfff1345337 R11: ffffffff89a299bf R12: 0000000000000001 [ 64.071188][ T8793] R13: ffff888216132dc0 R14: ffff8880913e78c0 R15: 0000000000000000 [ 64.079226][ T8793] FS: 00005555569b4880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 64.088188][ T8793] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.094798][ T8793] CR2: 0000000020000180 CR3: 000000008f0ca000 CR4: 00000000001406e0 [ 64.102795][ T8793] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.110809][ T8793] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.118768][ T8793] Kernel panic - not syncing: Fatal exception [ 64.126085][ T8793] Kernel Offset: disabled [ 64.130405][ T8793] Rebooting in 86400 seconds..