kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 31987 Comm: syz-executor.4 Not tainted 4.19.108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fbcon_cursor+0x10e/0x760 drivers/video/fbdev/core/fbcon.c:1347
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 0c 06 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 3d
RSP: 0018:ffff888213607778 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: ffff888219952a80 RCX: ffffc90006288000
RDX: 0000000020000000 RSI: ffffffff83738b49 RDI: ffff88805eca64a0
RBP: ffff88805eca6100 R08: ffff88803eac8400 R09: fffffbfff131a763
R10: fffffbfff131a762 R11: ffffffff898d3b17 R12: ffff8880a56f0500
R13: 0000000000000001 R14: 0000000100000004 R15: ffff8880a56f0968
FS:  00007f4f49589700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdebdce520 CR3: 000000004d265000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fbcon_blank+0x926/0xf00 drivers/video/fbdev/core/fbcon.c:2383
 do_unblank_screen+0x241/0x620 drivers/tty/vt/vt.c:4242
 unblank_screen drivers/tty/vt/vt.c:4261 [inline]
 poke_blanked_console+0x217/0x270 drivers/tty/vt/vt.c:4296
 set_selection+0xdc/0x1200 drivers/tty/vt/selection.c:178
 tioclinux+0x115/0x480 drivers/tty/vt/vt.c:3026
 vt_ioctl+0x1811/0x2310 drivers/tty/vt/vt_ioctl.c:364
 tty_ioctl+0x7a1/0x1420 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcda/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c479
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4f49588c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4f495896d4 RCX: 000000000045c479
RDX: 0000000020000140 RSI: 000000000000541c RDI: 0000000000000003
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000056e R14: 00000000004c7bf5 R15: 000000000076bf2c
Modules linked in:
---[ end trace 109581fb88074101 ]---
RIP: 0010:fbcon_cursor+0x10e/0x760 drivers/video/fbdev/core/fbcon.c:1347
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 0c 06 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 3d
RSP: 0018:ffff888213607778 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: ffff888219952a80 RCX: ffffc90006288000
RDX: 0000000020000000 RSI: ffffffff83738b49 RDI: ffff88805eca64a0
RBP: ffff88805eca6100 R08: ffff88803eac8400 R09: fffffbfff131a763
R10: fffffbfff131a762 R11: ffffffff898d3b17 R12: ffff8880a56f0500
R13: 0000000000000001 R14: 0000000100000004 R15: ffff8880a56f0968
FS:  00007f4f49589700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000c061a8 CR3: 000000004d265000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400