divide error: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 3646 Comm: kworker/1:2 Not tainted 4.14.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events console_callback task: ffff8880915a01c0 task.stack: ffff8880915a8000 RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:354 [inline] RIP: 0010:fbcon_switch+0x1cd/0x1b1f drivers/video/fbdev/core/fbcon.c:2195 RSP: 0018:ffff8880915afa48 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880915a0a98 RDI: ffff88808f08ae7c RBP: ffff8880a5bb0040 R08: ffffffff8a0b29ec R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808f08ab40 R13: ffff8882192536c0 R14: 0000000000000001 R15: ffff88808f08afb8 FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000562c6885df58 CR3: 00000000a54ca000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: redraw_screen+0x32c/0x790 drivers/tty/vt/vt.c:689 complete_change_console+0xf9/0x5b0 drivers/tty/vt/vt_ioctl.c:1284 change_console+0x15c/0x500 drivers/tty/vt/vt_ioctl.c:1409 console_callback+0x32c/0x380 drivers/tty/vt/vt.c:2473 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 4a 0b d6 07 83 c2 03 48 89 2d 80 0b d6 07 48 89 2d f9 0a d6 07 38 ca 7c 08 84 c9 0f 85 80 17 00 00 41 8b 9c 24 3c 03 00 00 31 d2 f3 83 f8 05 89 44 24 10 0f 8e 1c 0c 00 00 e8 3f 48 39 fe 8b RIP: fbcon_update_softback drivers/video/fbdev/core/fbcon.c:354 [inline] RSP: ffff8880915afa48 RIP: fbcon_switch+0x1cd/0x1b1f drivers/video/fbdev/core/fbcon.c:2195 RSP: ffff8880915afa48 ---[ end trace 82a4a661e44143ad ]---