netlink: 3 bytes leftover after parsing attributes in process `syz-executor.5'. sp0: Found TNC ------------[ cut here ]------------ kernel BUG at kernel/time/timer.c:1089! netlink: 3 bytes leftover after parsing attributes in process `syz-executor.5'. invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 118 Comm: kworker/u4:2 Not tainted 4.14.158-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound flush_to_ldisc task: ffff8880a9b5a1c0 task.stack: ffff8880a9b60000 RIP: 0010:add_timer kernel/time/timer.c:1089 [inline] RIP: 0010:add_timer+0x689/0xae0 kernel/time/timer.c:1087 RSP: 0018:ffff8880a9b67b38 EFLAGS: 00010297 RAX: ffff8880a9b5a1c0 RBX: ffff8880a9b67ba8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880a9b5aab8 RDI: ffff8880572b7348 RBP: ffff8880a9b67bd0 R08: ffff8880a9b5a1c0 R09: ffff8880a9b5aad8 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880572b7340 R13: dffffc0000000000 R14: ffff888090ebad70 R15: ffff8880572b7340 FS: 0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a400fa000 CR3: 0000000097ade000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: decode_prio_command drivers/net/hamradio/6pack.c:934 [inline] sixpack_decode drivers/net/hamradio/6pack.c:1003 [inline] sixpack_receive_buf drivers/net/hamradio/6pack.c:458 [inline] sixpack_receive_buf+0xc9a/0x1170 drivers/net/hamradio/6pack.c:435 tty_ldisc_receive_buf+0x14d/0x1a0 drivers/tty/tty_buffer.c:459 tty_port_default_receive_buf+0x73/0xa0 drivers/tty/tty_port.c:37 receive_buf drivers/tty/tty_buffer.c:475 [inline] flush_to_ldisc+0x1ec/0x400 drivers/tty/tty_buffer.c:527 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 84 8a 00 00 00 e8 c8 10 0d 00 65 ff 0d 61 af b1 7e 0f 85 3c fd ff ff e8 b6 10 0d 00 e8 05 04 b0 ff e9 2d fd ff ff e8 a7 10 0d 00 <0f> 0b e8 a0 10 0d 00 49 c7 c5 80 4a 02 00 e8 14 b3 ba 01 48 ba RIP: add_timer kernel/time/timer.c:1089 [inline] RSP: ffff8880a9b67b38 RIP: add_timer+0x689/0xae0 kernel/time/timer.c:1087 RSP: ffff8880a9b67b38 kobject: 'loop5' (ffff8880a41fed20): kobject_uevent_env kobject: 'loop5' (ffff8880a41fed20): fill_kobj_path: path = '/devices/virtual/block/loop5' IPVS: ftp: loaded support on port[0] = 21 kobject: 'lo' (ffff88805794c5f0): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'loop2' (ffff8880a40f5460): kobject_uevent_env kobject: 'lo' (ffff88805794c5f0): kobject_uevent_env kobject: 'loop2' (ffff8880a40f5460): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'lo' (ffff88805794c5f0): fill_kobj_path: path = '/devices/virtual/net/lo' kobject: 'loop4' (ffff8880a41a6ca0): kobject_uevent_env kobject: 'queues' (ffff88807f98ac48): kobject_add_internal: parent: 'lo', set: '' kobject: 'kvm' (ffff8882194b49d0): kobject_uevent_env kobject: 'loop4' (ffff8880a41a6ca0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'queues' (ffff88807f98ac48): kobject_uevent_env kobject: 'kvm' (ffff8882194b49d0): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (ffff8880a40f5460): kobject_uevent_env kobject: 'queues' (ffff88807f98ac48): kobject_uevent_env: filter function caused the event to drop! kobject: 'loop0' (ffff8880a1731360): kobject_uevent_env kobject: 'loop2' (ffff8880a40f5460): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'rx-0' (ffff8880a3984850): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'loop0' (ffff8880a1731360): fill_kobj_path: path = '/devices/virtual/block/loop0' EXT4-fs (loop2): VFS: Can't find ext4 filesystem kobject: 'rx-0' (ffff8880a3984850): kobject_uevent_env kobject: 'rx-0' (ffff8880a3984850): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' kobject: 'tx-0' (ffff8880a0831018): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'loop2' (ffff8880a40f5460): kobject_uevent_env kobject: 'loop2' (ffff8880a40f5460): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'tx-0' (ffff8880a0831018): kobject_uevent_env kobject: 'tx-0' (ffff8880a0831018): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' net_ratelimit: 22 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'kvm' (ffff8882194b49d0): kobject_uevent_env kobject: 'kvm' (ffff8882194b49d0): fill_kobj_path: path = '/devices/virtual/misc/kvm' netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. kobject: 'loop1' (ffff8880a40bd3e0): kobject_uevent_env kobject: 'loop1' (ffff8880a40bd3e0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'kvm' (ffff8882194b49d0): kobject_uevent_env kobject: 'kvm' (ffff8882194b49d0): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'rx-0' (ffff8880952080d0): kobject_cleanup, parent ffff88804d496548 kobject: 'loop2' (ffff8880a40f5460): kobject_uevent_env kobject: 'loop2' (ffff8880a40f5460): fill_kobj_path: path = '/devices/virtual/block/loop2' protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kauditd_printk_skb: 233 callbacks suppressed audit: type=1400 audit(1575896764.989:858): avc: denied { create } for pid=16202 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'rx-0' (ffff8880952080d0): auto cleanup 'remove' event kobject: 'kvm' (ffff8882194b49d0): kobject_uevent_env protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'rx-0' (ffff8880952080d0): kobject_uevent_env kobject: 'kvm' (ffff8882194b49d0): fill_kobj_path: path = '/devices/virtual/misc/kvm' EXT4-fs (loop2): VFS: Can't find ext4 filesystem kobject: 'rx-0' (ffff8880952080d0): fill_kobj_path: path = '/devices/virtual/net/nlmon0/queues/rx-0' kobject: 'loop2' (ffff8880a40f5460): kobject_uevent_env kobject: 'loop2' (ffff8880a40f5460): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'rx-0' (ffff8880952080d0): auto cleanup kobject_del ---[ end trace ecd97d19a75100cc ]--- audit: type=1400 audit(1575896764.989:859): avc: denied { write } for pid=16202 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'rx-0' (ffff8880952080d0): calling ktype release