Oops: general protection fault, probably for non-canonical address 0xdffffc000000003b: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000001d8-0x00000000000001df]
CPU: 0 UID: 0 PID: 30954 Comm: syz.9.6471 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:fbcon_do_set_font+0xb31/0x1650
Code: 48 c1 e8 03 42 0f b6 04 28 84 c0 48 8b 9c 24 c8 00 00 00 0f 85 e3 06 00 00 44 8b 32 48 81 c3 dc 01 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 e8 06 00 00 44 8b 3b 4c 89 ff 48 c7 c6
RSP: 0018:ffffc90003c87a10 EFLAGS: 00010203
RAX: 000000000000003b RBX: 00000000000001dc RCX: 0000000000000020
RDX: ffff88810a6fb134 RSI: 0000000000005779 RDI: ffff88810a6fb130
RBP: 0000000000000400 R08: ffffffff9011898f R09: 1ffffffff2023131
R10: dffffc0000000000 R11: fffffbfff2023132 R12: ffff88810068a000
R13: dffffc0000000000 R14: 0000000000000300 R15: ffff88810068a448
FS:  00007f8e94ff66c0(0000) GS:ffff88818de52000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000f000 CR3: 000000011e7de000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 con_font_op+0xc37/0xfe0
 vt_ioctl+0x1b93/0x20d0
 tty_ioctl+0x920/0xdd0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x170/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8e96d9e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8e94ff6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8e97025fa0 RCX: 00007f8e96d9e019
RDX: 0000200000000180 RSI: 0000000000004b72 RDI: 0000000000000005
RBP: 00007f8e96e3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e97026038 R14: 00007f8e97025fa0 R15: 00007ffca7b7fe88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fbcon_do_set_font+0xb31/0x1650
Code: 48 c1 e8 03 42 0f b6 04 28 84 c0 48 8b 9c 24 c8 00 00 00 0f 85 e3 06 00 00 44 8b 32 48 81 c3 dc 01 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 e8 06 00 00 44 8b 3b 4c 89 ff 48 c7 c6
RSP: 0018:ffffc90003c87a10 EFLAGS: 00010203
RAX: 000000000000003b RBX: 00000000000001dc RCX: 0000000000000020
RDX: ffff88810a6fb134 RSI: 0000000000005779 RDI: ffff88810a6fb130
RBP: 0000000000000400 R08: ffffffff9011898f R09: 1ffffffff2023131
R10: dffffc0000000000 R11: fffffbfff2023132 R12: ffff88810068a000
R13: dffffc0000000000 R14: 0000000000000300 R15: ffff88810068a448
FS:  00007f8e94ff66c0(0000) GS:ffff88818de52000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000f000 CR3: 000000011e7de000 CR4: 00000000000006f0
