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kernel BUG at kernel/time/timer.c:1136!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 4.20.0+ #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
RIP: 0010:add_timer kernel/time/timer.c:1136 [inline]
RIP: 0010:add_timer+0xa81/0x1470 kernel/time/timer.c:1134
Code: 4d 89 7d 40 48 c7 85 70 fe ff ff 00 00 00 00 c7 85 7c fe ff ff ff ff ff ff 48 89 85 90 fe ff ff e9 e6 f7 ff ff e8 cf 42 12 00 <0f> 0b e8 c8 42 12 00 0f 0b e8 c1 42 12 00 4c 89 bd 60 fe ff ff e9
RSP: 0018:ffff8880a946f5a8 EFLAGS: 00010293
RAX: ffff8880a94601c0 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816f4e71 RDI: ffff888050c575b8
RBP: ffff8880a946f760 R08: 0000000000000007 R09: ffff8880a9460ad8
R10: ffff8880a94601c0 R11: 0000000000000000 R12: ffff888050c575b8
R13: ffff888050c575b8 R14: ffff888050c57380 R15: 0000000000000028
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f380992e008 CR3: 000000009583f000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 decode_prio_command drivers/net/hamradio/6pack.c:903 [inline]
 sixpack_decode drivers/net/hamradio/6pack.c:971 [inline]
 sixpack_receive_buf drivers/net/hamradio/6pack.c:457 [inline]
 sixpack_receive_buf+0xf9c/0x1470 drivers/net/hamradio/6pack.c:434
 tty_ldisc_receive_buf+0x164/0x1c0 drivers/tty/tty_buffer.c:465
 tty_port_default_receive_buf+0x114/0x190 drivers/tty/tty_port.c:38
 receive_buf drivers/tty/tty_buffer.c:481 [inline]
 flush_to_ldisc+0x3b2/0x590 drivers/tty/tty_buffer.c:533
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
kobject: 'sp1' (0000000063066d3c): kobject_uevent_env
EXT4-fs warning (device sda1): ext4_resize_fs:1917: can't read last block, resize aborted
9pnet: Insufficient options for proto=fd
kobject: 'sp1' (0000000063066d3c): fill_kobj_path: path = '/devices/virtual/net/sp1'
9pnet: Insufficient options for proto=fd
kobject: 'loop3' (00000000afc0a552): kobject_uevent_env
kobject: 'loop3' (00000000afc0a552): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'queues' (00000000c5f03334): kobject_add_internal: parent: 'sp1', set: '<NULL>'
kobject: 'loop1' (0000000040e2a173): kobject_uevent_env
kobject: 'queues' (00000000c5f03334): kobject_uevent_env
kobject: 'loop1' (0000000040e2a173): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'queues' (00000000c5f03334): kobject_uevent_env: filter function caused the event to drop!
EXT4-fs warning (device sda1): ext4_resize_fs:1917: can't read last block, resize aborted
kobject: 'loop0' (00000000b58dfcb8): kobject_uevent_env
9pnet: Insufficient options for proto=fd
kobject: 'loop0' (00000000b58dfcb8): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'rx-0' (000000002c525348): kobject_add_internal: parent: 'queues', set: 'queues'
9pnet: Insufficient options for proto=fd
kobject: 'rx-0' (000000002c525348): kobject_uevent_env
kobject: 'loop2' (000000004a3e2a0c): kobject_uevent_env
kobject: 'loop2' (000000004a3e2a0c): fill_kobj_path: path = '/devices/virtual/block/loop2'
EXT4-fs warning (device sda1): ext4_resize_fs:1917: can't read last block, resize aborted
kobject: 'rx-0' (000000002c525348): fill_kobj_path: path = '/devices/virtual/net/sp1/queues/rx-0'
kobject: 'loop1' (0000000040e2a173): kobject_uevent_env
9pnet: Insufficient options for proto=fd
EXT4-fs warning (device sda1): ext4_resize_fs:1917: can't read last block, resize aborted
kobject: 'loop1' (0000000040e2a173): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'tx-0' (00000000de7481b2): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'loop5' (00000000d531a035): kobject_uevent_env
9pnet: Insufficient options for proto=fd
kobject: 'tx-0' (00000000de7481b2): kobject_uevent_env
kobject: 'loop5' (00000000d531a035): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000afc0a552): kobject_uevent_env
kobject: 'tx-0' (00000000de7481b2): fill_kobj_path: path = '/devices/virtual/net/sp1/queues/tx-0'
kobject: 'loop3' (00000000afc0a552): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (00000000b58dfcb8): kobject_uevent_env
sp1: Synchronizing with TNC
kobject: 'loop0' (00000000b58dfcb8): fill_kobj_path: path = '/devices/virtual/block/loop0'
sp1: Found TNC
---[ end trace 50cee7482038c5b5 ]---
RIP: 0010:add_timer kernel/time/timer.c:1136 [inline]
RIP: 0010:add_timer+0xa81/0x1470 kernel/time/timer.c:1134
Code: 4d 89 7d 40 48 c7 85 70 fe ff ff 00 00 00 00 c7 85 7c fe ff ff ff ff ff ff 48 89 85 90 fe ff ff e9 e6 f7 ff ff e8 cf 42 12 00 <0f> 0b e8 c8 42 12 00 0f 0b e8 c1 42 12 00 4c 89 bd 60 fe ff ff e9
RSP: 0018:ffff8880a946f5a8 EFLAGS: 00010293
RAX: ffff8880a94601c0 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816f4e71 RDI: ffff888050c575b8
RBP: ffff8880a946f760 R08: 0000000000000007 R09: ffff8880a9460ad8
R10: ffff8880a94601c0 R11: 0000000000000000 R12: ffff888050c575b8
R13: ffff888050c575b8 R14: ffff888050c57380 R15: 0000000000000028
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 000000008a57f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600