general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f] CPU: 1 PID: 3225 Comm: kworker/1:6 Not tainted 5.8.0-rc2-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/0x650 drivers/video/fbdev/core/fbcon.c:1389 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d5 04 00 00 48 8b 9d f0 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 2b RSP: 0018:ffffc9000afa7ac8 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 000000010000000e RCX: ffffffff83ec7154 RDX: 0000000020000001 RSI: ffffffff83bfb5e9 RDI: ffff8880a02813f0 RBP: ffff8880a0281000 R08: 0000000000000001 R09: ffff8880a397119f R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a3ab0000 R13: 0000000000000001 R14: ffff8880a3aae800 R15: ffff8880a3ab04a0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e9e90 CR3: 000000008e044000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: set_cursor drivers/tty/vt/vt.c:915 [inline] set_cursor+0x1dd/0x230 drivers/tty/vt/vt.c:906 redraw_screen+0x4b7/0x770 drivers/tty/vt/vt.c:1031 complete_change_console+0xff/0x610 drivers/tty/vt/vt_ioctl.c:1274 change_console+0x19c/0x560 drivers/tty/vt/vt_ioctl.c:1399 console_callback+0x3b1/0x410 drivers/tty/vt/vt.c:2850 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Modules linked in: ---[ end trace d4d9b9d1ec7fdac5 ]--- RIP: 0010:fbcon_cursor+0x10e/0x650 drivers/video/fbdev/core/fbcon.c:1389 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d5 04 00 00 48 8b 9d f0 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 2b RSP: 0018:ffffc9000afa7ac8 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 000000010000000e RCX: ffffffff83ec7154 RDX: 0000000020000001 RSI: ffffffff83bfb5e9 RDI: ffff8880a02813f0 RBP: ffff8880a0281000 R08: 0000000000000001 R09: ffff8880a397119f R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a3ab0000 R13: 0000000000000001 R14: ffff8880a3aae800 R15: ffff8880a3ab04a0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e9e90 CR3: 000000008e044000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400