worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Modules linked in: general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#2] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f] CPU: 0 PID: 22312 Comm: kworker/0:4 Not tainted 5.8.0-rc3-next-20200701-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/0x660 drivers/video/fbdev/core/fbcon.c:1389 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f8 04 00 00 48 8b 9d 08 04 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 4b RSP: 0018:ffffc90017a3f5f8 EFLAGS: 00010003 RAX: dffffc0000000000 RBX: 000000010000000e RCX: ffffffff83c21ca7 RDX: 0000000020000001 RSI: ffffffff83c1e979 RDI: ffff888095e4c408 RBP: ffff888095e4c000 R08: 0000000000000000 R09: ffffffff8aaec987 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a4b09000 R13: 0000000000000001 R14: ffff88821887ac00 R15: ffff8880a4b094a0 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 000000009fcd7000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fbcon_blank+0x865/0xbf0 drivers/video/fbdev/core/fbcon.c:2416 do_unblank_screen+0x248/0x430 drivers/tty/vt/vt.c:4394 bust_spinlocks+0x5b/0xe0 lib/bust_spinlocks.c:26 oops_end+0x2b/0xf0 arch/x86/kernel/dumpstack.c:337 do_trap_no_signal arch/x86/kernel/traps.c:119 [inline] do_trap+0x1d8/0x270 arch/x86/kernel/traps.c:157 do_error_trap+0xba/0x1e0 arch/x86/kernel/traps.c:177 __exc_divide_error arch/x86/kernel/traps.c:199 [inline] exc_divide_error+0x34/0x50 arch/x86/kernel/traps.c:197 asm_exc_divide_error+0x12/0x20 arch/x86/include/asm/idtentry.h:543 RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline] RIP: 0010:fbcon_switch+0x1fe/0x16c0 drivers/video/fbdev/core/fbcon.c:2256 Code: 2d 57 53 7e 09 48 89 2d d0 52 7e 09 38 ca 7c 08 84 c9 0f 85 7e 13 00 00 41 8b 9c 24 b4 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 d6 6f b1 fd 41 83 fe 05 0f 8e c4 09 00 00 RSP: 0018:ffffc90017a3f9a0 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff83c2779d RDI: 0000000000000005 RBP: ffff8880a3bf0000 R08: 0000000000000000 R09: ffffffff8aaec987 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888095e4c000 R13: ffff8880a4b09000 R14: 0000000000008000 R15: ffffffff88991860 redraw_screen+0x2af/0x770 drivers/tty/vt/vt.c:1020 complete_change_console+0xff/0x610 drivers/tty/vt/vt_ioctl.c:1279 change_console+0x19c/0x560 drivers/tty/vt/vt_ioctl.c:1404 console_callback+0x3b1/0x410 drivers/tty/vt/vt.c:2934 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Modules linked in: ---[ end trace 6546ef7b506cd850 ]--- RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline] RIP: 0010:fbcon_switch+0x1fe/0x16c0 drivers/video/fbdev/core/fbcon.c:2256 Code: 2d 57 53 7e 09 48 89 2d d0 52 7e 09 38 ca 7c 08 84 c9 0f 85 7e 13 00 00 41 8b 9c 24 b4 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 d6 6f b1 fd 41 83 fe 05 0f 8e c4 09 00 00 RSP: 0018:ffffc90017a3f9a0 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff83c2779d RDI: 0000000000000005 RBP: ffff8880a3bf0000 R08: 0000000000000000 R09: ffffffff8aaec987 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888095e4c000 R13: ffff8880a4b09000 R14: 0000000000008000 R15: ffffffff88991860 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 000000009fcd7000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400