[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.405809][ T26] audit: type=1800 audit(1563574848.149:25): pid=8562 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.456873][ T26] audit: type=1800 audit(1563574848.149:26): pid=8562 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.508564][ T26] audit: type=1800 audit(1563574848.159:27): pid=8562 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 '10.128.10.61' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.013294][ T8712] netlink: 4 bytes leftover after parsing attributes in process `syz-executor172'. [ 72.022752][ T8712] kasan: CONFIG_KASAN_INLINE enabled [ 72.028132][ T8712] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 72.036587][ T8712] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 72.043548][ T8712] CPU: 1 PID: 8712 Comm: syz-executor172 Not tainted 5.2.0+ #69 [ 72.051162][ T8712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.061218][ T8712] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 72.066586][ T8712] 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 [ 72.086170][ T8712] RSP: 0018:ffff88808d4b6eb8 EFLAGS: 00010246 [ 72.092214][ T8712] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110150d29e0 [ 72.100164][ T8712] RDX: 0000000000000000 RSI: 1ffff110150d29e7 RDI: 0000000000000282 [ 72.108125][ T8712] RBP: ffff88808d4b7060 R08: 0000000000000002 R09: ffff8880a8694f08 [ 72.116071][ T8712] R10: fffffbfff134a0cf R11: ffffffff89a5067f R12: 0000000000000001 [ 72.124033][ T8712] R13: ffff8882167ce040 R14: ffff88808d4b78c0 R15: 0000000000000000 [ 72.132350][ T8712] FS: 0000555556462880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 72.141261][ T8712] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.147832][ T8712] CR2: 0000000020000180 CR3: 0000000091de6000 CR4: 00000000001406e0 [ 72.155784][ T8712] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.163902][ T8712] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.171855][ T8712] Call Trace: [ 72.175129][ T8712] ? tc_lookup_action_n+0xd2/0x100 [ 72.180214][ T8712] ? __add_metainfo+0x480/0x480 [ 72.185054][ T8712] ? tc_lookup_action_n+0xd2/0x100 [ 72.190143][ T8712] ? __kasan_check_read+0x11/0x20 [ 72.195165][ T8712] ? lock_downgrade+0x920/0x920 [ 72.200012][ T8712] ? __kasan_check_write+0x14/0x20 [ 72.205097][ T8712] ? do_raw_read_unlock+0x3f/0x70 [ 72.210099][ T8712] tcf_action_init_1+0x6f2/0xa80 [ 72.215017][ T8712] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.221229][ T8712] ? tcf_action_dump_old+0x80/0x80 [ 72.226316][ T8712] ? lock_downgrade+0x920/0x920 [ 72.231143][ T8712] ? __kasan_check_read+0x11/0x20 [ 72.236141][ T8712] ? mark_lock+0xc0/0x11e0 [ 72.240535][ T8712] tcf_action_init+0x241/0x360 [ 72.245277][ T8712] ? tcf_action_init_1+0xa80/0xa80 [ 72.250385][ T8712] ? mark_lock+0xc0/0x11e0 [ 72.254803][ T8712] ? mark_lock+0xc0/0x11e0 [ 72.259213][ T8712] ? __kasan_check_read+0x11/0x20 [ 72.264219][ T8712] tcf_action_add+0xe8/0x370 [ 72.268785][ T8712] ? tca_action_gd+0x1710/0x1710 [ 72.273704][ T8712] ? refcount_dec_not_one+0x1f0/0x1f0 [ 72.279060][ T8712] ? __nla_parse+0x43/0x60 [ 72.283468][ T8712] tc_ctl_action+0x3b5/0x4bc [ 72.288035][ T8712] ? tcf_action_add+0x370/0x370 [ 72.292866][ T8712] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.299081][ T8712] ? tcf_action_add+0x370/0x370 [ 72.303908][ T8712] rtnetlink_rcv_msg+0x463/0xb00 [ 72.308823][ T8712] ? rtnetlink_put_metrics+0x580/0x580 [ 72.314258][ T8712] ? lock_downgrade+0x920/0x920 [ 72.319084][ T8712] ? netlink_deliver_tap+0x22d/0xbf0 [ 72.324344][ T8712] ? find_held_lock+0x35/0x130 [ 72.329086][ T8712] netlink_rcv_skb+0x177/0x450 [ 72.333830][ T8712] ? rtnetlink_put_metrics+0x580/0x580 [ 72.339260][ T8712] ? netlink_ack+0xb30/0xb30 [ 72.343848][ T8712] ? __kasan_check_read+0x11/0x20 [ 72.348852][ T8712] ? netlink_deliver_tap+0x254/0xbf0 [ 72.354113][ T8712] rtnetlink_rcv+0x1d/0x30 [ 72.358509][ T8712] netlink_unicast+0x531/0x710 [ 72.363248][ T8712] ? netlink_attachskb+0x7c0/0x7c0 [ 72.368337][ T8712] ? _copy_from_iter_full+0x25d/0x8a0 [ 72.373687][ T8712] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 72.379400][ T8712] ? __check_object_size+0x3d/0x43c [ 72.384593][ T8712] netlink_sendmsg+0x8a5/0xd60 [ 72.389334][ T8712] ? netlink_unicast+0x710/0x710 [ 72.394276][ T8712] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 72.399798][ T8712] ? apparmor_socket_sendmsg+0x2a/0x30 [ 72.405235][ T8712] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.411449][ T8712] ? security_socket_sendmsg+0x8d/0xc0 [ 72.416883][ T8712] ? netlink_unicast+0x710/0x710 [ 72.421793][ T8712] sock_sendmsg+0xd7/0x130 [ 72.426183][ T8712] ___sys_sendmsg+0x803/0x920 [ 72.430921][ T8712] ? copy_msghdr_from_user+0x440/0x440 [ 72.436359][ T8712] ? prep_transhuge_page+0xa0/0xa0 [ 72.441444][ T8712] ? percpu_counter_add_batch+0x13c/0x190 [ 72.447137][ T8712] ? __do_page_fault+0x56a/0xdd0 [ 72.452056][ T8712] ? find_held_lock+0x35/0x130 [ 72.456804][ T8712] ? __do_page_fault+0x56a/0xdd0 [ 72.461720][ T8712] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.468025][ T8712] ? __fget_light+0x1a9/0x230 [ 72.472680][ T8712] ? __fdget+0x1b/0x20 [ 72.476747][ T8712] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 72.482966][ T8712] __sys_sendmsg+0x105/0x1d0 [ 72.487534][ T8712] ? __sys_sendmsg_sock+0xd0/0xd0 [ 72.492534][ T8712] ? down_read_non_owner+0x450/0x450 [ 72.497796][ T8712] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 72.503249][ T8712] ? do_syscall_64+0x26/0x6a0 [ 72.507905][ T8712] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.513946][ T8712] ? do_syscall_64+0x26/0x6a0 [ 72.518601][ T8712] __x64_sys_sendmsg+0x78/0xb0 [ 72.524777][ T8712] do_syscall_64+0xfd/0x6a0 [ 72.529255][ T8712] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.535123][ T8712] RIP: 0033:0x4401d9 [ 72.538995][ T8712] 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 [ 72.558577][ T8712] RSP: 002b:00007fff24684b78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 72.566964][ T8712] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 72.574917][ T8712] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 72.582864][ T8712] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 72.590811][ T8712] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 72.598776][ T8712] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 72.606748][ T8712] Modules linked in: [ 72.611597][ T8712] ---[ end trace a6077dd929c76c3f ]--- [ 72.617113][ T8712] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 72.622507][ T8712] 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 [ 72.642129][ T8712] RSP: 0018:ffff88808d4b6eb8 EFLAGS: 00010246 [ 72.648172][ T8712] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110150d29e0 [ 72.656165][ T8712] RDX: 0000000000000000 RSI: 1ffff110150d29e7 RDI: 0000000000000282 [ 72.664151][ T8712] RBP: ffff88808d4b7060 R08: 0000000000000002 R09: ffff8880a8694f08 [ 72.672128][ T8712] R10: fffffbfff134a0cf R11: ffffffff89a5067f R12: 0000000000000001 [ 72.680103][ T8712] R13: ffff8882167ce040 R14: ffff88808d4b78c0 R15: 0000000000000000 [ 72.688104][ T8712] FS: 0000555556462880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 72.697067][ T8712] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.703671][ T8712] CR2: 0000000020000180 CR3: 0000000091de6000 CR4: 00000000001406e0 [ 72.711633][ T8712] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.719621][ T8712] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.727620][ T8712] Kernel panic - not syncing: Fatal exception [ 72.734896][ T8712] Kernel Offset: disabled [ 72.747816][ T8712] Rebooting in 86400 seconds..