UBIFS error (pid: 20438): cannot open "ub", error -22
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6810 Comm: kworker/1:3 Not tainted 4.19.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events console_callback
RIP: 0010:fbcon_cursor+0x10e/0x760 drivers/video/fbdev/core/fbcon.c:1350
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 0c 06 00 00 4c 8b b5 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 3d
RSP: 0018:ffff88805dde7b48 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888219739840 RCX: ffffffff839ff82d
RDX: 000000001fffffea RSI: ffffffff83757b69 RDI: ffff888058c4a4a0
RBP: ffff888058c4a100 R08: ffff88805ddde340 R09: ffffed10432e8074
R10: ffffed10432e8073 R11: ffff88821974039f R12: ffff888219780880
R13: 0000000000000001 R14: 00000000ffffff50 R15: ffff888219780ce8
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004f2410 CR3: 0000000056ec1000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 set_cursor drivers/tty/vt/vt.c:910 [inline]
 set_cursor+0x1e6/0x230 drivers/tty/vt/vt.c:901
 redraw_screen+0x5ee/0x870 drivers/tty/vt/vt.c:1028
 complete_change_console+0x100/0x390 drivers/tty/vt/vt_ioctl.c:1284
 change_console+0x191/0x2b0 drivers/tty/vt/vt_ioctl.c:1409
 console_callback+0x393/0x3f0 drivers/tty/vt/vt.c:2825
 process_one_work+0x91f/0x1640 kernel/workqueue.c:2155
 worker_thread+0x96/0xe20 kernel/workqueue.c:2298
 kthread+0x34a/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
---[ end trace a439d51a8a3de612 ]---
RIP: 0010:fbcon_cursor+0x10e/0x760 drivers/video/fbdev/core/fbcon.c:1350
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 0c 06 00 00 4c 8b b5 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 3d
RSP: 0018:ffff88805dde7b48 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888219739840 RCX: ffffffff839ff82d
RDX: 000000001fffffea RSI: ffffffff83757b69 RDI: ffff888058c4a4a0
RBP: ffff888058c4a100 R08: ffff88805ddde340 R09: ffffed10432e8074
R10: ffffed10432e8073 R11: ffff88821974039f R12: ffff888219780880
R13: 0000000000000001 R14: 00000000ffffff50 R15: ffff888219780ce8
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004f2410 CR3: 0000000056ec1000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400