[ 84.516476][ T27] audit: type=1800 audit(1579632354.618:26): pid=9463 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 85.432796][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 85.432808][ T27] audit: type=1800 audit(1579632355.558:29): pid=9463 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 85.459372][ T27] audit: type=1800 audit(1579632355.568:30): pid=9463 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 97.356095][ T9621] netlink: 96 bytes leftover after parsing attributes in process `syz-executor414'. executing program [ 97.648599][ T9624] netlink: 96 bytes leftover after parsing attributes in process `syz-executor414'. [ 97.659065][ T9624] ------------[ cut here ]------------ [ 97.664622][ T9624] WARNING: CPU: 0 PID: 9624 at net/sched/sch_cbq.c:1437 cbq_destroy_class+0x11a/0x150 [ 97.674147][ T9624] Kernel panic - not syncing: panic_on_warn set ... [ 97.680725][ T9624] CPU: 0 PID: 9624 Comm: syz-executor414 Not tainted 5.5.0-rc6-syzkaller #0 [ 97.689380][ T9624] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.699421][ T9624] Call Trace: [ 97.702703][ T9624] dump_stack+0x197/0x210 [ 97.707027][ T9624] ? cbq_destroy_class+0x80/0x150 [ 97.712055][ T9624] panic+0x2e3/0x75c [ 97.715953][ T9624] ? add_taint.cold+0x16/0x16 [ 97.720620][ T9624] ? printk+0xba/0xed [ 97.724605][ T9624] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 97.730060][ T9624] ? __warn.cold+0x14/0x3e [ 97.734466][ T9624] ? __warn+0xd9/0x1cf [ 97.738526][ T9624] ? cbq_destroy_class+0x11a/0x150 [ 97.743672][ T9624] __warn.cold+0x2f/0x3e [ 97.747918][ T9624] ? report_bug.cold+0x63/0xb2 [ 97.752680][ T9624] ? cbq_destroy_class+0x11a/0x150 [ 97.757795][ T9624] report_bug+0x289/0x300 [ 97.762117][ T9624] do_error_trap+0x11b/0x200 [ 97.766696][ T9624] do_invalid_op+0x37/0x50 [ 97.771098][ T9624] ? cbq_destroy_class+0x11a/0x150 [ 97.776210][ T9624] invalid_op+0x23/0x30 [ 97.780361][ T9624] RIP: 0010:cbq_destroy_class+0x11a/0x150 [ 97.786066][ T9624] Code: 00 00 e8 d9 57 da ff 49 39 dc 74 0d e8 9f 98 30 fb 4c 89 e7 e8 67 09 6e fb e8 92 98 30 fb 5b 41 5c 41 5d 5d c3 e8 86 98 30 fb <0f> 0b e9 37 ff ff ff e8 9a 58 6e fb e9 12 ff ff ff e8 b0 58 6e fb [ 97.805814][ T9624] RSP: 0018:ffffc90001ab70e0 EFLAGS: 00010293 [ 97.811865][ T9624] RAX: ffff8880a6c1a4c0 RBX: ffff888095886000 RCX: ffffffff86445bcf [ 97.819837][ T9624] RDX: 0000000000000000 RSI: ffffffff86445c9a RDI: 0000000000000005 [ 97.827806][ T9624] RBP: ffffc90001ab70f8 R08: ffff8880a6c1a4c0 R09: fffffbfff165e7a0 [ 97.835765][ T9624] R10: fffffbfff165e79f R11: ffffffff8b2f3cff R12: ffff888095886320 [ 97.843731][ T9624] R13: 0000000000000001 R14: 0000000000000000 R15: ffff888095886320 [ 97.851710][ T9624] ? cbq_destroy_class+0x4f/0x150 [ 97.856719][ T9624] ? cbq_destroy_class+0x11a/0x150 [ 97.861827][ T9624] cbq_destroy+0x208/0x2c0 [ 97.866253][ T9624] ? cbq_walk+0x320/0x320 [ 97.870696][ T9624] qdisc_destroy+0x11f/0x630 [ 97.875308][ T9624] qdisc_put+0xdb/0x100 [ 97.879455][ T9624] notify_and_destroy+0xa2/0xb0 [ 97.884401][ T9624] qdisc_graft+0xd42/0x1210 [ 97.888905][ T9624] ? tc_dump_tclass+0x4e0/0x4e0 [ 97.893748][ T9624] ? tc_get_qdisc+0xc10/0xc10 [ 97.898425][ T9624] tc_modify_qdisc+0xcbd/0x1cd0 [ 97.903275][ T9624] ? qdisc_create+0x1210/0x1210 [ 97.908130][ T9624] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.914358][ T9624] ? qdisc_create+0x1210/0x1210 [ 97.919196][ T9624] rtnetlink_rcv_msg+0x45e/0xaf0 [ 97.924129][ T9624] ? rtnl_bridge_getlink+0x910/0x910 [ 97.929400][ T9624] ? lock_downgrade+0x920/0x920 [ 97.934236][ T9624] ? netlink_deliver_tap+0x228/0xbe0 [ 97.939510][ T9624] ? find_held_lock+0x35/0x130 [ 97.944294][ T9624] netlink_rcv_skb+0x177/0x450 [ 97.949053][ T9624] ? rtnl_bridge_getlink+0x910/0x910 [ 97.954357][ T9624] ? netlink_ack+0xb50/0xb50 [ 97.958942][ T9624] ? __kasan_check_read+0x11/0x20 [ 97.963959][ T9624] ? netlink_deliver_tap+0x24a/0xbe0 [ 97.969236][ T9624] rtnetlink_rcv+0x1d/0x30 [ 97.973686][ T9624] netlink_unicast+0x58c/0x7d0 [ 97.978479][ T9624] ? netlink_attachskb+0x870/0x870 [ 97.983580][ T9624] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 97.989287][ T9624] ? __check_object_size+0x3d/0x437 [ 97.994488][ T9624] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 98.000205][ T9624] netlink_sendmsg+0x91c/0xea0 [ 98.004961][ T9624] ? netlink_unicast+0x7d0/0x7d0 [ 98.009895][ T9624] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 98.015433][ T9624] ? apparmor_socket_sendmsg+0x2a/0x30 [ 98.020882][ T9624] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.027116][ T9624] ? security_socket_sendmsg+0x8d/0xc0 [ 98.032563][ T9624] ? netlink_unicast+0x7d0/0x7d0 [ 98.037481][ T9624] sock_sendmsg+0xd7/0x130 [ 98.041885][ T9624] kernel_sendmsg+0x44/0x50 [ 98.046378][ T9624] sock_no_sendpage+0x116/0x150 [ 98.051218][ T9624] ? sock_kzfree_s+0x70/0x70 [ 98.055800][ T9624] ? lock_acquire+0x190/0x410 [ 98.060462][ T9624] ? pipe_lock+0x65/0x80 [ 98.064759][ T9624] kernel_sendpage+0x92/0xf0 [ 98.069352][ T9624] ? sock_kzfree_s+0x70/0x70 [ 98.073942][ T9624] sock_sendpage+0x8b/0xc0 [ 98.078346][ T9624] pipe_to_sendpage+0x2da/0x3c0 [ 98.083226][ T9624] ? kernel_sendpage+0xf0/0xf0 [ 98.087973][ T9624] ? direct_splice_actor+0x190/0x190 [ 98.093246][ T9624] ? splice_from_pipe_next.part.0+0x2a2/0x350 [ 98.099318][ T9624] __splice_from_pipe+0x3ee/0x7c0 [ 98.104342][ T9624] ? direct_splice_actor+0x190/0x190 [ 98.109611][ T9624] ? direct_splice_actor+0x190/0x190 [ 98.114879][ T9624] splice_from_pipe+0x108/0x170 [ 98.119723][ T9624] ? splice_shrink_spd+0xd0/0xd0 [ 98.124651][ T9624] ? apparmor_file_permission+0x27/0x30 [ 98.130223][ T9624] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.136453][ T9624] ? security_file_permission+0x8f/0x380 [ 98.142072][ T9624] ? rcu_read_lock_held+0x9c/0xb0 [ 98.147138][ T9624] generic_splice_sendpage+0x3c/0x50 [ 98.152456][ T9624] ? splice_from_pipe+0x170/0x170 [ 98.157467][ T9624] do_splice+0xba4/0x1680 [ 98.161796][ T9624] ? ksys_dup3+0x3e0/0x3e0 [ 98.166200][ T9624] ? opipe_prep.part.0+0x300/0x300 [ 98.171299][ T9624] ? __fget_light+0x1a9/0x230 [ 98.175958][ T9624] __x64_sys_splice+0x2c6/0x330 [ 98.180810][ T9624] do_syscall_64+0xfa/0x790 [ 98.185345][ T9624] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.191226][ T9624] RIP: 0033:0x446e79 [ 98.195105][ T9624] Code: e8 5c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 98.214692][ T9624] RSP: 002b:00007f3ef76eed88 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 98.223090][ T9624] RAX: ffffffffffffffda RBX: 00000000006dcc98 RCX: 0000000000446e79 [ 98.231050][ T9624] RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000007 [ 98.239014][ T9624] RBP: 00000000006dcc90 R08: 000000000004ffe0 R09: 0000000000000000 [ 98.246974][ T9624] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc9c [ 98.254934][ T9624] R13: 00000000004aed8e R14: 54c6c2ff093a6d32 R15: 0000000000010000 [ 98.264309][ T9624] Kernel Offset: disabled [ 98.268691][ T9624] Rebooting in 86400 seconds..