[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.981633][ T27] audit: type=1800 audit(1563582007.955:25): pid=8723 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.019919][ T27] audit: type=1800 audit(1563582007.955:26): pid=8723 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.058366][ T27] audit: type=1800 audit(1563582007.965:27): pid=8723 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 '10.128.0.138' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.195787][ T8877] netlink: 4 bytes leftover after parsing attributes in process `syz-executor919'. [ 66.210107][ T8877] kasan: CONFIG_KASAN_INLINE enabled [ 66.215584][ T8877] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 66.225100][ T8877] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 66.232151][ T8877] CPU: 1 PID: 8877 Comm: syz-executor919 Not tainted 5.2.0+ #69 [ 66.239869][ T8877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.250712][ T8877] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 66.256175][ T8877] 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 [ 66.275935][ T8877] RSP: 0018:ffff88809903eeb8 EFLAGS: 00010246 [ 66.282081][ T8877] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11015242998 [ 66.290294][ T8877] RDX: 0000000000000000 RSI: 1ffff1101524299f RDI: 0000000000000282 [ 66.298377][ T8877] RBP: ffff88809903f060 R08: 0000000000000002 R09: ffff8880a9214cc8 [ 66.306328][ T8877] R10: fffffbfff134a0cf R11: ffffffff89a5067f R12: 0000000000000001 [ 66.314300][ T8877] R13: ffff888216757b00 R14: ffff88809903f8c0 R15: 0000000000000000 [ 66.322553][ T8877] FS: 00005555569f6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 66.331464][ T8877] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.338023][ T8877] CR2: 0000000020000180 CR3: 00000000a65e9000 CR4: 00000000001406e0 [ 66.346062][ T8877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.354014][ T8877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.361978][ T8877] Call Trace: [ 66.365277][ T8877] ? tc_lookup_action_n+0xd2/0x100 [ 66.370411][ T8877] ? __add_metainfo+0x480/0x480 [ 66.375240][ T8877] ? tc_lookup_action_n+0xd2/0x100 [ 66.380329][ T8877] ? __kasan_check_read+0x11/0x20 [ 66.385337][ T8877] ? lock_downgrade+0x920/0x920 [ 66.390190][ T8877] ? __kasan_check_write+0x14/0x20 [ 66.395296][ T8877] ? do_raw_read_unlock+0x3f/0x70 [ 66.400424][ T8877] tcf_action_init_1+0x6f2/0xa80 [ 66.405348][ T8877] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.411574][ T8877] ? tcf_action_dump_old+0x80/0x80 [ 66.416665][ T8877] ? lock_downgrade+0x920/0x920 [ 66.421522][ T8877] ? __kasan_check_read+0x11/0x20 [ 66.426532][ T8877] ? mark_lock+0xc0/0x11e0 [ 66.430929][ T8877] tcf_action_init+0x241/0x360 [ 66.435690][ T8877] ? tcf_action_init_1+0xa80/0xa80 [ 66.442194][ T8877] ? mark_lock+0xc0/0x11e0 [ 66.446593][ T8877] ? mark_lock+0xc0/0x11e0 [ 66.450991][ T8877] ? __kasan_check_read+0x11/0x20 [ 66.455996][ T8877] tcf_action_add+0xe8/0x370 [ 66.460563][ T8877] ? tca_action_gd+0x1710/0x1710 [ 66.465505][ T8877] ? refcount_dec_not_one+0x1f0/0x1f0 [ 66.470870][ T8877] ? __nla_parse+0x43/0x60 [ 66.475268][ T8877] tc_ctl_action+0x3b5/0x4bc [ 66.479841][ T8877] ? tcf_action_add+0x370/0x370 [ 66.484698][ T8877] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.490920][ T8877] ? tcf_action_add+0x370/0x370 [ 66.495752][ T8877] rtnetlink_rcv_msg+0x463/0xb00 [ 66.500754][ T8877] ? rtnetlink_put_metrics+0x580/0x580 [ 66.506190][ T8877] ? lock_downgrade+0x920/0x920 [ 66.511033][ T8877] ? netlink_deliver_tap+0x22d/0xbf0 [ 66.516314][ T8877] ? find_held_lock+0x35/0x130 [ 66.521090][ T8877] netlink_rcv_skb+0x177/0x450 [ 66.525838][ T8877] ? rtnetlink_put_metrics+0x580/0x580 [ 66.531274][ T8877] ? netlink_ack+0xb30/0xb30 [ 66.535848][ T8877] ? __kasan_check_read+0x11/0x20 [ 66.540853][ T8877] ? netlink_deliver_tap+0x254/0xbf0 [ 66.546118][ T8877] rtnetlink_rcv+0x1d/0x30 [ 66.550529][ T8877] netlink_unicast+0x531/0x710 [ 66.555289][ T8877] ? netlink_attachskb+0x7c0/0x7c0 [ 66.560398][ T8877] ? _copy_from_iter_full+0x25d/0x8a0 [ 66.565766][ T8877] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 66.571466][ T8877] ? __check_object_size+0x3d/0x43c [ 66.576641][ T8877] netlink_sendmsg+0x8a5/0xd60 [ 66.581386][ T8877] ? netlink_unicast+0x710/0x710 [ 66.586317][ T8877] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 66.591856][ T8877] ? apparmor_socket_sendmsg+0x2a/0x30 [ 66.597293][ T8877] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.603512][ T8877] ? security_socket_sendmsg+0x8d/0xc0 [ 66.608961][ T8877] ? netlink_unicast+0x710/0x710 [ 66.613881][ T8877] sock_sendmsg+0xd7/0x130 [ 66.618275][ T8877] ___sys_sendmsg+0x803/0x920 [ 66.622932][ T8877] ? copy_msghdr_from_user+0x440/0x440 [ 66.628460][ T8877] ? prep_transhuge_page+0xa0/0xa0 [ 66.633556][ T8877] ? percpu_counter_add_batch+0x13c/0x190 [ 66.639258][ T8877] ? __do_page_fault+0x56a/0xdd0 [ 66.644177][ T8877] ? find_held_lock+0x35/0x130 [ 66.648930][ T8877] ? __do_page_fault+0x56a/0xdd0 [ 66.653846][ T8877] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.660063][ T8877] ? __fget_light+0x1a9/0x230 [ 66.664716][ T8877] ? __fdget+0x1b/0x20 [ 66.668759][ T8877] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 66.675121][ T8877] __sys_sendmsg+0x105/0x1d0 [ 66.679688][ T8877] ? __sys_sendmsg_sock+0xd0/0xd0 [ 66.684692][ T8877] ? down_read_non_owner+0x450/0x450 [ 66.689959][ T8877] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 66.695496][ T8877] ? do_syscall_64+0x26/0x6a0 [ 66.700155][ T8877] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.706475][ T8877] ? do_syscall_64+0x26/0x6a0 [ 66.711503][ T8877] __x64_sys_sendmsg+0x78/0xb0 [ 66.716247][ T8877] do_syscall_64+0xfd/0x6a0 [ 66.720736][ T8877] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.726617][ T8877] RIP: 0033:0x4401d9 [ 66.730501][ T8877] 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 [ 66.750083][ T8877] RSP: 002b:00007ffceb813a38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 66.758471][ T8877] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 66.766422][ T8877] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 66.774376][ T8877] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 66.782336][ T8877] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 66.790302][ T8877] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 66.798310][ T8877] Modules linked in: [ 66.803341][ T8877] ---[ end trace b3670f028490e650 ]--- [ 66.808832][ T8877] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 66.814422][ T8877] 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 [ 66.834254][ T8877] RSP: 0018:ffff88809903eeb8 EFLAGS: 00010246 [ 66.840365][ T8877] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11015242998 [ 66.848343][ T8877] RDX: 0000000000000000 RSI: 1ffff1101524299f RDI: 0000000000000282 [ 66.856356][ T8877] RBP: ffff88809903f060 R08: 0000000000000002 R09: ffff8880a9214cc8 [ 66.864359][ T8877] R10: fffffbfff134a0cf R11: ffffffff89a5067f R12: 0000000000000001 [ 66.872367][ T8877] R13: ffff888216757b00 R14: ffff88809903f8c0 R15: 0000000000000000 [ 66.880359][ T8877] FS: 00005555569f6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 66.889268][ T8877] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.896041][ T8877] CR2: 0000000020000180 CR3: 00000000a65e9000 CR4: 00000000001406e0 [ 66.904038][ T8877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.912017][ T8877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.919996][ T8877] Kernel panic - not syncing: Fatal exception [ 66.927482][ T8877] Kernel Offset: disabled [ 66.931806][ T8877] Rebooting in 86400 seconds..