BUG: unable to handle page fault for address: fffff520008d0314
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffee067 P4D 23ffee067 PUD 16dd0067 PMD 1f785067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5154 Comm: syz.0.209 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:fast_imageblit drivers/video/fbdev/core/sysimgblt.c:257 [inline]
RIP: 0010:sys_imageblit+0x1885/0x25d0 drivers/video/fbdev/core/sysimgblt.c:323
Code: 89 74 24 10 0f 85 e8 02 00 00 0f b6 46 ff c1 e8 07 21 d0 8b 9c 84 c0 00 00 00 4c 8b 7c 24 30 4b 8d 3c 37 48 89 f8 48 c1 e8 03 <0f> b6 04 08 84 c0 0f 85 f8 02 00 00 43 89 1c 37 0f b6 46 ff c1 e8
RSP: 0018:ffffc9000331f5c0 EFLAGS: 00010a06
RAX: 1ffff920008d0314 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: ffff8881479954d1 RDI: ffffc900046818a0
RBP: ffffc9000331f740 R08: ffff88807b5ad940 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000002 R12: 0000000000000008
R13: 1ffff11028f32a9a R14: 0000000000000000 R15: ffffc900046818a0
FS:  00007eff252fc6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520008d0314 CR3: 000000007b5ba000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_fb_helper_sys_imageblit+0x2e/0x510 drivers/gpu/drm/drm_fb_helper.c:793
 soft_cursor+0x9fd/0xc30 drivers/video/fbdev/core/softcursor.c:74
 bit_cursor+0x16b5/0x1f40 drivers/video/fbdev/core/bitblit.c:409
 set_cursor drivers/tty/vt/vt.c:920 [inline]
 con_flush_chars+0x1f6/0x270 drivers/tty/vt/vt.c:3368
 con_write+0x29/0x40 drivers/tty/vt/vt.c:3296
 process_output_block drivers/tty/n_tty.c:592 [inline]
 n_tty_write+0xd19/0x1220 drivers/tty/n_tty.c:2339
 do_tty_write drivers/tty/tty_io.c:1038 [inline]
 file_tty_write+0x50c/0x8a0 drivers/tty/tty_io.c:1110
 call_write_iter include/linux/fs.h:2179 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x748/0xd70 fs/read_write.c:594
 ksys_write+0x153/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7eff270a4159
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:00007eff252fc028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007eff2732bfa0 RCX: 00007eff270a4159
RDX: 0000000000001006 RSI: 00002000000009c0 RDI: 0000000000000005
RBP: 00007eff2713b06b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007eff2732c038 R14: 00007eff2732bfa0 R15: 00007ffd7e66f9c8
 </TASK>
Modules linked in:
CR2: fffff520008d0314
---[ end trace a03d556d425fa9db ]---
RIP: 0010:fast_imageblit drivers/video/fbdev/core/sysimgblt.c:257 [inline]
RIP: 0010:sys_imageblit+0x1885/0x25d0 drivers/video/fbdev/core/sysimgblt.c:323
Code: 89 74 24 10 0f 85 e8 02 00 00 0f b6 46 ff c1 e8 07 21 d0 8b 9c 84 c0 00 00 00 4c 8b 7c 24 30 4b 8d 3c 37 48 89 f8 48 c1 e8 03 <0f> b6 04 08 84 c0 0f 85 f8 02 00 00 43 89 1c 37 0f b6 46 ff c1 e8
RSP: 0018:ffffc9000331f5c0 EFLAGS: 00010a06
RAX: 1ffff920008d0314 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: ffff8881479954d1 RDI: ffffc900046818a0
RBP: ffffc9000331f740 R08: ffff88807b5ad940 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000002 R12: 0000000000000008
R13: 1ffff11028f32a9a R14: 0000000000000000 R15: ffffc900046818a0
FS:  00007eff252fc6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520008d0314 CR3: 000000007b5ba000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 74 24 10          	mov    %esi,0x10(%rsp)
   4:	0f 85 e8 02 00 00    	jne    0x2f2
   a:	0f b6 46 ff          	movzbl -0x1(%rsi),%eax
   e:	c1 e8 07             	shr    $0x7,%eax
  11:	21 d0                	and    %edx,%eax
  13:	8b 9c 84 c0 00 00 00 	mov    0xc0(%rsp,%rax,4),%ebx
  1a:	4c 8b 7c 24 30       	mov    0x30(%rsp),%r15
  1f:	4b 8d 3c 37          	lea    (%r15,%r14,1),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 f8 02 00 00    	jne    0x32e
  36:	43 89 1c 37          	mov    %ebx,(%r15,%r14,1)
  3a:	0f b6 46 ff          	movzbl -0x1(%rsi),%eax
  3e:	c1                   	.byte 0xc1
  3f:	e8                   	.byte 0xe8