general protection fault, probably for non-canonical address 0xdffffc00000001fc: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000fe0-0x0000000000000fe7]
CPU: 1 PID: 14680 Comm: syz-executor.5 Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:__fb_pad_aligned_buffer include/linux/fb.h:632 [inline]
RIP: 0010:bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
RIP: 0010:bit_putcs+0x5fa/0xd20 drivers/video/fbdev/core/bitblit.c:185
Code: 64 24 5c 48 8b 5c 24 18 49 83 c4 01 eb 03 45 89 ee e8 5a 2b 2d fd 48 89 ef 48 83 c5 01 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 38 38 d0 7f 08 84 c0 0f 85 aa 05 00 00 48 89 d8 48 89
RSP: 0000:ffffc900033f7688 EFLAGS: 00010246
RAX: 00000000000001fc RBX: ffff88801f4189c0 RCX: ffffc9000c4de000
RDX: 0000000000000000 RSI: ffffffff84563c06 RDI: 0000000000000fe0
RBP: 0000000000000fe1 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000001 R12: 0000000000000001
R13: 00000000000000e0 R14: 000000000000000f R15: dffffc0000000000
FS:  00007f2fc01b4700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c925000 CR3: 000000004fe8d000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 fbcon_putcs+0x318/0x3e0 drivers/video/fbdev/core/fbcon.c:1282
 con_flush drivers/tty/vt/vt.c:2572 [inline]
 do_con_write+0xd80/0x1e70 drivers/tty/vt/vt.c:2905
 con_put_char+0x74/0xa0 drivers/tty/vt/vt.c:3254
 tty_put_char+0xbb/0x150 drivers/tty/tty_io.c:3141
 do_output_char+0x155/0x850 drivers/tty/n_tty.c:480
 process_output drivers/tty/n_tty.c:505 [inline]
 n_tty_write+0x581/0xfd0 drivers/tty/n_tty.c:2361
 do_tty_write drivers/tty/tty_io.c:1018 [inline]
 file_tty_write.constprop.0+0x453/0x9c0 drivers/tty/tty_io.c:1089
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x945/0xd50 fs/read_write.c:584
 ksys_write+0x12b/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2fbf48c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2fc01b4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2fbf5abf80 RCX: 00007f2fbf48c169
RDX: 0000000000001006 RSI: 0000000020001040 RDI: 0000000000000004
RBP: 00007f2fbf4e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd70e2efdf R14: 00007f2fc01b4300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__fb_pad_aligned_buffer include/linux/fb.h:632 [inline]
RIP: 0010:bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
RIP: 0010:bit_putcs+0x5fa/0xd20 drivers/video/fbdev/core/bitblit.c:185
Code: 64 24 5c 48 8b 5c 24 18 49 83 c4 01 eb 03 45 89 ee e8 5a 2b 2d fd 48 89 ef 48 83 c5 01 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 38 38 d0 7f 08 84 c0 0f 85 aa 05 00 00 48 89 d8 48 89
RSP: 0000:ffffc900033f7688 EFLAGS: 00010246
RAX: 00000000000001fc RBX: ffff88801f4189c0 RCX: ffffc9000c4de000
RDX: 0000000000000000 RSI: ffffffff84563c06 RDI: 0000000000000fe0
RBP: 0000000000000fe1 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000001 R12: 0000000000000001
R13: 00000000000000e0 R14: 000000000000000f R15: dffffc0000000000
FS:  00007f2fc01b4700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c925000 CR3: 000000004fe8d000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	64 24 5c             	fs and $0x5c,%al
   3:	48 8b 5c 24 18       	mov    0x18(%rsp),%rbx
   8:	49 83 c4 01          	add    $0x1,%r12
   c:	eb 03                	jmp    0x11
   e:	45 89 ee             	mov    %r13d,%r14d
  11:	e8 5a 2b 2d fd       	callq  0xfd2d2b70
  16:	48 89 ef             	mov    %rbp,%rdi
  19:	48 83 c5 01          	add    $0x1,%rbp
  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 38       	movzbl (%rax,%r15,1),%eax <-- trapping instruction
  2f:	38 d0                	cmp    %dl,%al
  31:	7f 08                	jg     0x3b
  33:	84 c0                	test   %al,%al
  35:	0f 85 aa 05 00 00    	jne    0x5e5
  3b:	48 89 d8             	mov    %rbx,%rax
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89