divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 2485 Comm: kworker/1:3 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events console_callback RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline] RIP: 0010:fbcon_switch+0x1fc/0x16f0 drivers/video/fbdev/core/fbcon.c:2256 Code: 2d a9 8d 59 09 48 89 2d 22 8d 59 09 38 ca 7c 08 84 c9 0f 85 83 12 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 f8 50 b2 fd 41 83 fe 05 0f 8e 4a 0b 00 00 RSP: 0018:ffffc900080279f0 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff83c17eeb RDI: 0000000000000005 RBP: ffff8880a39f0000 R08: ffff8880a0752380 R09: fffffbfff1516d90 R10: ffffffff8a8b6c7f R11: fffffbfff1516d8f R12: ffff8880a4081000 R13: ffff8880a397a000 R14: 0000000000008000 R15: ffffffff887854a0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004f2f70 CR3: 000000004d982000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015 complete_change_console+0x104/0x3a0 drivers/tty/vt/vt_ioctl.c:1274 change_console+0x197/0x2c0 drivers/tty/vt/vt_ioctl.c:1399 console_callback+0x3b1/0x410 drivers/tty/vt/vt.c:2850 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 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: 2485 Comm: kworker/1:3 Not tainted 5.7.0-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 e2 04 00 00 4c 8b bd f0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <0f> b6 14 02 4c 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 b1 RSP: 0018:ffffc90008027690 EFLAGS: 00010003 RAX: dffffc0000000000 RBX: ffff8880a3947c00 RCX: ffffffff83c1306e RDX: 0000000020000001 RSI: ffffffff83c126a9 RDI: ffff8880a40813f0 RBP: ffff8880a4081000 R08: ffff8880a0752380 R09: fffffbfff1516d90 R10: ffffffff8a8b6c7f R11: fffffbfff1516d8f R12: ffff8880a397a000 R13: 0000000000000001 R14: ffff8880a397a4a0 R15: 000000010000000e FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004f2f70 CR3: 000000004d982000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fbcon_blank+0x87e/0xc10 drivers/video/fbdev/core/fbcon.c:2415 do_unblank_screen drivers/tty/vt/vt.c:4310 [inline] do_unblank_screen+0x248/0x430 drivers/tty/vt/vt.c:4278 bust_spinlocks+0x5b/0xe0 lib/bust_spinlocks.c:26 oops_end+0x2b/0xf0 arch/x86/kernel/dumpstack.c:336 do_trap_no_signal arch/x86/kernel/traps.c:138 [inline] do_trap+0x10a/0x250 arch/x86/kernel/traps.c:176 do_divide_error+0x2f/0x40 arch/x86/kernel/traps.c:214 divide_error+0x23/0x30 arch/x86/entry/entry_64.S:1024 RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline] RIP: 0010:fbcon_switch+0x1fc/0x16f0 drivers/video/fbdev/core/fbcon.c:2256 Code: 2d a9 8d 59 09 48 89 2d 22 8d 59 09 38 ca 7c 08 84 c9 0f 85 83 12 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 f8 50 b2 fd 41 83 fe 05 0f 8e 4a 0b 00 00 RSP: 0018:ffffc900080279f0 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff83c17eeb RDI: 0000000000000005 RBP: ffff8880a39f0000 R08: ffff8880a0752380 R09: fffffbfff1516d90 R10: ffffffff8a8b6c7f R11: fffffbfff1516d8f R12: ffff8880a4081000 R13: ffff8880a397a000 R14: 0000000000008000 R15: ffffffff887854a0 redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015 complete_change_console+0x104/0x3a0 drivers/tty/vt/vt_ioctl.c:1274 change_console+0x197/0x2c0 drivers/tty/vt/vt_ioctl.c:1399 console_callback+0x3b1/0x410 drivers/tty/vt/vt.c:2850 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Modules linked in: ---[ end trace 0918854549d1e449 ]--- RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline] RIP: 0010:fbcon_switch+0x1fc/0x16f0 drivers/video/fbdev/core/fbcon.c:2256 Code: 2d a9 8d 59 09 48 89 2d 22 8d 59 09 38 ca 7c 08 84 c9 0f 85 83 12 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 f8 50 b2 fd 41 83 fe 05 0f 8e 4a 0b 00 00 RSP: 0018:ffffc900080279f0 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff83c17eeb RDI: 0000000000000005 RBP: ffff8880a39f0000 R08: ffff8880a0752380 R09: fffffbfff1516d90 R10: ffffffff8a8b6c7f R11: fffffbfff1516d8f R12: ffff8880a4081000 R13: ffff8880a397a000 R14: 0000000000008000 R15: ffffffff887854a0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004f2f70 CR3: 000000004d982000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400