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: general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#2] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f] CPU: 1 PID: 28751 Comm: kworker/1:16 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:ffffc900017875f8 EFLAGS: 00010003 RAX: dffffc0000000000 RBX: 000000010000000e RCX: ffffffff83bfe667 RDX: 0000000020000001 RSI: ffffffff83bfb349 RDI: ffff88809af4d3f0 RBP: ffff88809af4d000 R08: 0000000000000000 R09: ffffffff8aae2d47 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888218eb4000 R13: 0000000000000001 R14: ffff888218eb2400 R15: ffff888218eb44a0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005647ff191b10 CR3: 000000003ff7d000 CR4: 00000000001406e0 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:4310 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:120 [inline] do_trap+0x1d8/0x270 arch/x86/kernel/traps.c:158 do_error_trap+0xba/0x1e0 arch/x86/kernel/traps.c:178 __exc_divide_error arch/x86/kernel/traps.c:200 [inline] exc_divide_error+0x34/0x50 arch/x86/kernel/traps.c:198 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 f7 3b 7f 09 48 89 2d 70 3b 7f 09 38 ca 7c 08 84 c9 0f 85 7d 13 00 00 41 8b 9c 24 8c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 96 26 b3 fd 41 83 fe 05 0f 8e c3 09 00 00 RSP: 0018:ffffc900017879a0 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff83c0265d RDI: 0000000000000005 RBP: ffff8880a3b00000 R08: 0000000000000000 R09: ffffffff8aae2d47 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809af4d000 R13: ffff888218eb4000 R14: 0000000000008000 R15: ffffffff8898e820 redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015 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 94302b7b7be88557 ]--- 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 f7 3b 7f 09 48 89 2d 70 3b 7f 09 38 ca 7c 08 84 c9 0f 85 7d 13 00 00 41 8b 9c 24 8c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 96 26 b3 fd 41 83 fe 05 0f 8e c3 09 00 00 RSP: 0018:ffffc900017879a0 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff83c0265d RDI: 0000000000000005 RBP: ffff8880a3b00000 R08: 0000000000000000 R09: ffffffff8aae2d47 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809af4d000 R13: ffff888218eb4000 R14: 0000000000008000 R15: ffffffff8898e820 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005647ff191b10 CR3: 000000003ff7d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400