divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 19605 Comm: kworker/1:0 Not tainted 4.19.131-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:360 [inline] RIP: 0010:fbcon_switch+0x1fe/0x1d26 drivers/video/fbdev/core/fbcon.c:2217 Code: 2d 67 bc b2 08 48 89 2d e0 bb b2 08 38 ca 7c 08 84 c9 0f 85 0d 1b 00 00 41 8b 9c 24 3c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 a6 3f e9 fd 41 83 fe 05 0f 8e 8d 0e 00 00 RSP: 0018:ffff8880549f79c8 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8380698d RDI: 0000000000000005 RBP: ffff8880a57b0040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880383b0e00 R13: ffff8882196b3680 R14: 0000000000008000 R15: ffffffff87cf5ea0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559bc1f62068 CR3: 000000002c8cb000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: redraw_screen+0x37d/0x870 drivers/tty/vt/vt.c:1015 complete_change_console+0xf9/0x610 drivers/tty/vt/vt_ioctl.c:1284 change_console+0x196/0x560 drivers/tty/vt/vt_ioctl.c:1409 console_callback+0x393/0x3f0 drivers/tty/vt/vt.c:2830 process_one_work+0x864/0x1570 kernel/workqueue.c:2155 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298 kthread+0x30b/0x410 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Modules linked in: kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#2] PREEMPT SMP KASAN CPU: 1 PID: 19605 Comm: kworker/1:0 Not tainted 4.19.131-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/0x760 drivers/video/fbdev/core/fbcon.c:1350 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e4 05 00 00 4c 8b b5 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 66 RSP: 0018:ffff8880549f7540 EFLAGS: 00010003 RAX: dffffc0000000000 RBX: ffff88821968a0c0 RCX: ffffffff837f96d2 RDX: 0000000020000001 RSI: ffffffff837f5cc9 RDI: ffff8880383b11a0 RBP: ffff8880383b0e00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8ad1f05b R12: ffff8882196b3680 R13: 0000000000000001 R14: 000000010000000e R15: ffff8882196b3ae8 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559bc1f62068 CR3: 000000002c8cb000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fbcon_blank+0x8b5/0xec0 drivers/video/fbdev/core/fbcon.c:2386 do_unblank_screen+0x241/0x610 drivers/tty/vt/vt.c:4268 bust_spinlocks+0x5b/0xe0 oops_end+0x2b/0xe0 arch/x86/kernel/dumpstack.c:336 do_trap_no_signal arch/x86/kernel/traps.c:214 [inline] do_trap+0x1bb/0x250 arch/x86/kernel/traps.c:258 do_error_trap+0x15d/0x310 arch/x86/kernel/traps.c:303 divide_error+0x14/0x20 arch/x86/entry/entry_64.S:1035 RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:360 [inline] RIP: 0010:fbcon_switch+0x1fe/0x1d26 drivers/video/fbdev/core/fbcon.c:2217 Code: 2d 67 bc b2 08 48 89 2d e0 bb b2 08 38 ca 7c 08 84 c9 0f 85 0d 1b 00 00 41 8b 9c 24 3c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 a6 3f e9 fd 41 83 fe 05 0f 8e 8d 0e 00 00 RSP: 0018:ffff8880549f79c8 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8380698d RDI: 0000000000000005 RBP: ffff8880a57b0040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880383b0e00 R13: ffff8882196b3680 R14: 0000000000008000 R15: ffffffff87cf5ea0 redraw_screen+0x37d/0x870 drivers/tty/vt/vt.c:1015 complete_change_console+0xf9/0x610 drivers/tty/vt/vt_ioctl.c:1284 change_console+0x196/0x560 drivers/tty/vt/vt_ioctl.c:1409 console_callback+0x393/0x3f0 drivers/tty/vt/vt.c:2830 process_one_work+0x864/0x1570 kernel/workqueue.c:2155 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298 kthread+0x30b/0x410 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Modules linked in: ---[ end trace c4e950493609e138 ]--- RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:360 [inline] RIP: 0010:fbcon_switch+0x1fe/0x1d26 drivers/video/fbdev/core/fbcon.c:2217 Code: 2d 67 bc b2 08 48 89 2d e0 bb b2 08 38 ca 7c 08 84 c9 0f 85 0d 1b 00 00 41 8b 9c 24 3c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 a6 3f e9 fd 41 83 fe 05 0f 8e 8d 0e 00 00 RSP: 0018:ffff8880549f79c8 EFLAGS: 00010246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8380698d RDI: 0000000000000005 RBP: ffff8880a57b0040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880383b0e00 R13: ffff8882196b3680 R14: 0000000000008000 R15: ffffffff87cf5ea0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559bc1f62068 CR3: 000000002c8cb000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400