sp0: Synchronizing with TNC sp0: Found TNC sp0: Synchronizing with TNC 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: 2201 Comm: kworker/u4:3 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: ffff8880a400a480 task.stack: ffff8880a4018000 RIP: 0010:add_timer kernel/time/timer.c:1089 [inline] RIP: 0010:add_timer+0x689/0xae0 kernel/time/timer.c:1087 RSP: 0018:ffff8880a401fb38 EFLAGS: 00010297 RAX: ffff8880a400a480 RBX: ffff8880a401fba8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880a400ad78 RDI: ffff8880a506f388 RBP: ffff8880a401fbd0 R08: ffff8880a400a480 R09: ffff8880a400ad98 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a506f380 R13: dffffc0000000000 R14: ffff8880876e8f4b R15: ffff8880a506f380 FS: 0000000000000000(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000250a728 CR3: 000000009111e000 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+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: ffff8880a401fb38 RIP: add_timer+0x689/0xae0 kernel/time/timer.c:1087 RSP: ffff8880a401fb38 ---[ end trace fc61a135649e23c6 ]---