general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 27739 Comm: syz-executor.2 Not tainted 6.7.0-rc6-next-20231222-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__fb_pad_aligned_buffer include/linux/fb.h:625 [inline]
RIP: 0010:bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
RIP: 0010:bit_putcs+0x62b/0xde0 drivers/video/fbdev/core/bitblit.c:185
Code: 64 24 5c 4c 8b 7c 24 28 49 83 c4 01 eb 03 44 89 ed e8 49 24 d9 fc 48 89 df 48 83 c3 01 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 30 38 d0 7f 08 84 c0 0f 85 19 04 00 00 4c 89 f8 4c 89
RSP: 0018:ffffc900134478c8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc9000a992000
RDX: 0000000000000000 RSI: ffffffff84aeef77 RDI: 0000000000000000
RBP: 000000000000000f R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000001 R12: 0000000000000004
R13: ffff88801e2f9360 R14: dffffc0000000000 R15: ffff88801e2f9360
FS:  00007f6bf1d176c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6bf10d98c6 CR3: 0000000029a59000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fbcon_putcs+0x314/0x3d0 drivers/video/fbdev/core/fbcon.c:1284
 do_update_region+0x3e0/0x670 drivers/tty/vt/vt.c:623
 update_region+0xc1/0x160 drivers/tty/vt/vt.c:641
 vcs_write+0x7d3/0xdb0 drivers/tty/vt/vc_screen.c:698
 vfs_write+0x2a4/0xdf0 fs/read_write.c:588
 ksys_write+0x12f/0x250 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f6bf107cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6bf1d170c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6bf119bf80 RCX: 00007f6bf107cce9
RDX: 000000000000045c RSI: 0000000020000440 RDI: 0000000000000003
RBP: 00007f6bf10c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6bf119bf80 R15: 00007ffe26318f88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__fb_pad_aligned_buffer include/linux/fb.h:625 [inline]
RIP: 0010:bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
RIP: 0010:bit_putcs+0x62b/0xde0 drivers/video/fbdev/core/bitblit.c:185
Code: 64 24 5c 4c 8b 7c 24 28 49 83 c4 01 eb 03 44 89 ed e8 49 24 d9 fc 48 89 df 48 83 c3 01 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 30 38 d0 7f 08 84 c0 0f 85 19 04 00 00 4c 89 f8 4c 89
RSP: 0018:ffffc900134478c8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc9000a992000
RDX: 0000000000000000 RSI: ffffffff84aeef77 RDI: 0000000000000000
RBP: 000000000000000f R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000001 R12: 0000000000000004
R13: ffff88801e2f9360 R14: dffffc0000000000 R15: ffff88801e2f9360
FS:  00007f6bf1d176c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6bf10d98c6 CR3: 0000000029a59000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	64 24 5c             	fs and $0x5c,%al
   3:	4c 8b 7c 24 28       	mov    0x28(%rsp),%r15
   8:	49 83 c4 01          	add    $0x1,%r12
   c:	eb 03                	jmp    0x11
   e:	44 89 ed             	mov    %r13d,%ebp
  11:	e8 49 24 d9 fc       	call   0xfcd9245f
  16:	48 89 df             	mov    %rbx,%rdi
  19:	48 83 c3 01          	add    $0x1,%rbx
  1d:	48 89 f8             	mov    %rdi,%rax
  20:	48 89 fa             	mov    %rdi,%rdx
  23:	48 c1 e8 03          	shr    $0x3,%rax
  27:	83 e2 07             	and    $0x7,%edx
* 2a:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax <-- trapping instruction
  2f:	38 d0                	cmp    %dl,%al
  31:	7f 08                	jg     0x3b
  33:	84 c0                	test   %al,%al
  35:	0f 85 19 04 00 00    	jne    0x454
  3b:	4c 89 f8             	mov    %r15,%rax
  3e:	4c                   	rex.WR
  3f:	89                   	.byte 0x89