[ 84.297898][ T27] audit: type=1800 audit(1579646237.233:26): pid=9467 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. [ 85.272063][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 85.272074][ T27] audit: type=1800 audit(1579646238.233:29): pid=9467 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 [ 85.298385][ T27] audit: type=1800 audit(1579646238.233:30): pid=9467 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 '10.128.0.95' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 96.654006][ T9622] netlink: 96 bytes leftover after parsing attributes in process `syz-executor014'. executing program [ 96.969399][ T9625] netlink: 96 bytes leftover after parsing attributes in process `syz-executor014'. [ 96.979995][ T9625] ------------[ cut here ]------------ [ 96.985499][ T9625] WARNING: CPU: 0 PID: 9625 at net/sched/sch_cbq.c:1437 cbq_destroy_class+0x11a/0x150 [ 96.995081][ T9625] Kernel panic - not syncing: panic_on_warn set ... [ 97.001687][ T9625] CPU: 0 PID: 9625 Comm: syz-executor014 Not tainted 5.5.0-rc7-syzkaller #0 [ 97.010352][ T9625] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.020397][ T9625] Call Trace: [ 97.023698][ T9625] dump_stack+0x197/0x210 [ 97.028072][ T9625] ? cbq_destroy_class+0x80/0x150 [ 97.033139][ T9625] panic+0x2e3/0x75c [ 97.037044][ T9625] ? add_taint.cold+0x16/0x16 [ 97.041716][ T9625] ? printk+0xba/0xed [ 97.045689][ T9625] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 97.051136][ T9625] ? __warn.cold+0x14/0x3e [ 97.055536][ T9625] ? __warn+0xd9/0x1cf [ 97.059589][ T9625] ? cbq_destroy_class+0x11a/0x150 [ 97.064736][ T9625] __warn.cold+0x2f/0x3e [ 97.069076][ T9625] ? report_bug.cold+0x63/0xb2 [ 97.073827][ T9625] ? cbq_destroy_class+0x11a/0x150 [ 97.079893][ T9625] report_bug+0x289/0x300 [ 97.084226][ T9625] do_error_trap+0x11b/0x200 [ 97.088829][ T9625] do_invalid_op+0x37/0x50 [ 97.093253][ T9625] ? cbq_destroy_class+0x11a/0x150 [ 97.098359][ T9625] invalid_op+0x23/0x30 [ 97.102507][ T9625] RIP: 0010:cbq_destroy_class+0x11a/0x150 [ 97.108326][ T9625] 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 [ 97.128051][ T9625] RSP: 0018:ffffc90001fe70d0 EFLAGS: 00010293 [ 97.134555][ T9625] RAX: ffff888095a02140 RBX: ffff888095606000 RCX: ffffffff86445bcf [ 97.142663][ T9625] RDX: 0000000000000000 RSI: ffffffff86445c9a RDI: 0000000000000005 [ 97.150634][ T9625] RBP: ffffc90001fe70e8 R08: ffff888095a02140 R09: fffffbfff165e7a0 [ 97.158619][ T9625] R10: fffffbfff165e79f R11: ffffffff8b2f3cff R12: ffff888095606320 [ 97.166662][ T9625] R13: 0000000000000001 R14: 0000000000000000 R15: ffff888095606320 [ 97.174770][ T9625] ? cbq_destroy_class+0x4f/0x150 [ 97.179812][ T9625] ? cbq_destroy_class+0x11a/0x150 [ 97.184926][ T9625] cbq_destroy+0x208/0x2c0 [ 97.189395][ T9625] ? cbq_walk+0x320/0x320 [ 97.193737][ T9625] qdisc_destroy+0x11f/0x630 [ 97.198376][ T9625] qdisc_put+0xdb/0x100 [ 97.202541][ T9625] notify_and_destroy+0xa2/0xb0 [ 97.207388][ T9625] qdisc_graft+0xd42/0x1210 [ 97.211889][ T9625] ? tc_dump_tclass+0x4e0/0x4e0 [ 97.216779][ T9625] ? tc_get_qdisc+0xc10/0xc10 [ 97.221524][ T9625] tc_modify_qdisc+0xcbd/0x1cd0 [ 97.226388][ T9625] ? qdisc_create+0x1210/0x1210 [ 97.231251][ T9625] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.237506][ T9625] ? qdisc_create+0x1210/0x1210 [ 97.242354][ T9625] rtnetlink_rcv_msg+0x45e/0xaf0 [ 97.247290][ T9625] ? rtnl_bridge_getlink+0x910/0x910 [ 97.252700][ T9625] ? lock_downgrade+0x920/0x920 [ 97.257547][ T9625] ? netlink_deliver_tap+0x228/0xbe0 [ 97.262968][ T9625] ? find_held_lock+0x35/0x130 [ 97.267741][ T9625] netlink_rcv_skb+0x177/0x450 [ 97.272589][ T9625] ? rtnl_bridge_getlink+0x910/0x910 [ 97.277891][ T9625] ? netlink_ack+0xb50/0xb50 [ 97.282483][ T9625] ? __kasan_check_read+0x11/0x20 [ 97.287510][ T9625] ? netlink_deliver_tap+0x24a/0xbe0 [ 97.292859][ T9625] rtnetlink_rcv+0x1d/0x30 [ 97.297287][ T9625] netlink_unicast+0x58c/0x7d0 [ 97.302042][ T9625] ? netlink_attachskb+0x870/0x870 [ 97.307196][ T9625] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 97.312915][ T9625] ? __check_object_size+0x3d/0x437 [ 97.318100][ T9625] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 97.323830][ T9625] netlink_sendmsg+0x91c/0xea0 [ 97.328713][ T9625] ? netlink_unicast+0x7d0/0x7d0 [ 97.333664][ T9625] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 97.339313][ T9625] ? apparmor_socket_sendmsg+0x2a/0x30 [ 97.345463][ T9625] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.351697][ T9625] ? security_socket_sendmsg+0x8d/0xc0 [ 97.357239][ T9625] ? netlink_unicast+0x7d0/0x7d0 [ 97.362518][ T9625] sock_sendmsg+0xd7/0x130 [ 97.367004][ T9625] kernel_sendmsg+0x44/0x50 [ 97.371499][ T9625] sock_no_sendpage+0x116/0x150 [ 97.376393][ T9625] ? sock_kzfree_s+0x70/0x70 [ 97.380980][ T9625] ? lock_acquire+0x190/0x410 [ 97.385639][ T9625] ? pipe_lock+0x65/0x80 [ 97.389880][ T9625] kernel_sendpage+0x92/0xf0 [ 97.394460][ T9625] ? sock_kzfree_s+0x70/0x70 [ 97.399094][ T9625] sock_sendpage+0x8b/0xc0 [ 97.403536][ T9625] pipe_to_sendpage+0x2da/0x3c0 [ 97.408390][ T9625] ? kernel_sendpage+0xf0/0xf0 [ 97.413147][ T9625] ? direct_splice_actor+0x190/0x190 [ 97.418554][ T9625] ? splice_from_pipe_next.part.0+0x2a2/0x350 [ 97.424780][ T9625] __splice_from_pipe+0x3ee/0x7c0 [ 97.429901][ T9625] ? direct_splice_actor+0x190/0x190 [ 97.435177][ T9625] ? direct_splice_actor+0x190/0x190 [ 97.440669][ T9625] splice_from_pipe+0x108/0x170 [ 97.445516][ T9625] ? splice_shrink_spd+0xd0/0xd0 [ 97.450460][ T9625] ? apparmor_file_permission+0x27/0x30 [ 97.456020][ T9625] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.462263][ T9625] ? security_file_permission+0x8f/0x380 [ 97.467926][ T9625] ? rcu_read_lock_held+0x9c/0xb0 [ 97.472959][ T9625] generic_splice_sendpage+0x3c/0x50 [ 97.478244][ T9625] ? splice_from_pipe+0x170/0x170 [ 97.483256][ T9625] do_splice+0xba4/0x1680 [ 97.487574][ T9625] ? ksys_dup3+0x3e0/0x3e0 [ 97.491988][ T9625] ? opipe_prep.part.0+0x300/0x300 [ 97.497084][ T9625] ? __fget_light+0x1a9/0x230 [ 97.501846][ T9625] __ia32_sys_splice+0x2c4/0x330 [ 97.506802][ T9625] do_fast_syscall_32+0x27b/0xe16 [ 97.511825][ T9625] entry_SYSENTER_compat+0x70/0x7f [ 97.516996][ T9625] RIP: 0023:0xf7f5a9a9 [ 97.521175][ T9625] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 97.540889][ T9625] RSP: 002b:00000000f7f351cc EFLAGS: 00000296 ORIG_RAX: 0000000000000139 [ 97.549293][ T9625] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000000000000 [ 97.557643][ T9625] RDX: 0000000000000009 RSI: 0000000000000000 RDI: 000000000004ffe0 [ 97.565713][ T9625] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 97.573688][ T9625] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 97.581652][ T9625] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 97.593449][ T9625] Kernel Offset: disabled [ 97.597972][ T9625] Rebooting in 86400 seconds..