ptrace attach of "/root/syz-executor.2"[18540] was attempted by "/root/syz-executor.2"[18543]
Cannot find add_set index 0 as target
ip6_tables: ip6tables: counters copy to user failed while replacing table
sp0: Found TNC
------------[ cut here ]------------
kernel BUG at kernel/time/timer.c:1089!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 8702 Comm: kworker/u4:7 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
task: ffff88805af32440 task.stack: ffff88805e4d0000
RIP: 0010:add_timer kernel/time/timer.c:1089 [inline]
RIP: 0010:add_timer+0x5d/0x70 kernel/time/timer.c:1087
RSP: 0018:ffff88805e4d7c08 EFLAGS: 00010297
RAX: ffff88805af32440 RBX: ffff888087934de0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88805af32d40 RDI: ffff8880563b1408
RBP: ffff8880563b1400 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000100001eda R14: ffff8880563b1400 R15: 0000000000000028
FS:  0000000000000000(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30224000 CR3: 000000008d01f000 CR4: 00000000001406f0
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+0xc76/0x112f drivers/net/hamradio/6pack.c:435
 tty_ldisc_receive_buf+0x12e/0x170 drivers/tty/tty_buffer.c:459
 tty_port_default_receive_buf+0x6e/0xa0 drivers/tty/tty_port.c:37
 receive_buf drivers/tty/tty_buffer.c:475 [inline]
 flush_to_ldisc+0x1dd/0x3f0 drivers/tty/tty_buffer.c:527
 process_one_work+0x7c0/0x14c0 kernel/workqueue.c:2116
 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 7d 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 1b 48 8b 75 10 48 89 ef 5d e9 48 f1 ff ff e8 13 87 0c 00 <0f> 0b e8 ac c0 35 00 eb be e8 a5 c0 35 00 eb de 0f 1f 00 41 57 
RIP: add_timer kernel/time/timer.c:1089 [inline] RSP: ffff88805e4d7c08
RIP: add_timer+0x5d/0x70 kernel/time/timer.c:1087 RSP: ffff88805e4d7c08
---[ end trace 834dc36c4c16ef2e ]---