BUG: unable to handle page fault for address: ffffc90003e89000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 18800067 P4D 18800067 PUD 1aa4a067 PMD 141776067 PTE 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8875 Comm: syz.0.1146 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:memset64 arch/x86/include/asm/string_64.h:58 [inline]
RIP: 0010:memset_l include/linux/string.h:169 [inline]
RIP: 0010:bitfill_aligned+0x192/0x240 drivers/video/fbdev/core/sysfillrect.c:53
Code: 48 31 c3 49 89 1e eb 73 e8 9b 2c 07 fd 44 89 e3 4c 8b 64 24 08 4c 8b 2c 24 89 d8 31 d2 f7 f5 89 c3 4c 89 e0 4c 89 ef 48 89 d9 <f3> 48 ab 31 ff 44 89 fe e8 21 30 07 fd 4d 85 ff 74 3a e8 67 2c 07
RSP: 0018:ffffc900051171a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000180 RCX: 0000000000000180
RDX: 0000000000000000 RSI: 000000000001cce4 RDI: ffffc90003e89000
RBP: 0000000000000040 R08: 0000000000006000 R09: 0000000000000040
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000
R13: ffffc90003e89000 R14: ffffffffffffffff R15: 0000000000000000
FS:  00007f7a53bf66c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90003e89000 CR3: 000000002f458000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 sys_fillrect+0x609/0x820 drivers/video/fbdev/core/sysfillrect.c:281
 drm_fbdev_generic_defio_fillrect+0x2c/0x110 drivers/gpu/drm/drm_fbdev_generic.c:37
 bit_clear+0x163/0x1f0 drivers/video/fbdev/core/bitblit.c:73
 __fbcon_clear+0x4c3/0x820 drivers/video/fbdev/core/fbcon.c:1284
 fbcon_scroll+0x442/0x760 drivers/video/fbdev/core/fbcon.c:1848
 con_scroll+0x77d/0xa00 drivers/tty/vt/vt.c:577
 csi_M+0xa8/0x140 drivers/tty/vt/vt.c:2009
 do_con_trol drivers/tty/vt/vt.c:2417 [inline]
 do_con_write+0x4b50/0x70a0 drivers/tty/vt/vt.c:2905
 con_put_char+0x83/0xc0 drivers/tty/vt/vt.c:3253
 tty_put_char+0xc9/0x150 drivers/tty/tty_io.c:3143
 do_output_char+0x6ab/0x960 drivers/tty/n_tty.c:474
 process_output drivers/tty/n_tty.c:500 [inline]
 n_tty_write+0xdee/0x11e0 drivers/tty/n_tty.c:2406
 iterate_tty_write drivers/tty/tty_io.c:1017 [inline]
 file_tty_write+0x529/0x960 drivers/tty/tty_io.c:1088
 call_write_iter include/linux/fs.h:2018 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x474/0x9a0 fs/read_write.c:584
 ksys_write+0x151/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7a5599e1d9
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:00007f7a53bf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7a55c25fa0 RCX: 00007f7a5599e1d9
RDX: 0000000000001006 RSI: 0000200000001040 RDI: 0000000000000004
RBP: 00007f7a55a35888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7a55c26038 R14: 00007f7a55c25fa0 R15: 00007fffb3eaed28
 </TASK>
Modules linked in:
CR2: ffffc90003e89000
---[ end trace 0000000000000000 ]---
RIP: 0010:memset64 arch/x86/include/asm/string_64.h:58 [inline]
RIP: 0010:memset_l include/linux/string.h:169 [inline]
RIP: 0010:bitfill_aligned+0x192/0x240 drivers/video/fbdev/core/sysfillrect.c:53
Code: 48 31 c3 49 89 1e eb 73 e8 9b 2c 07 fd 44 89 e3 4c 8b 64 24 08 4c 8b 2c 24 89 d8 31 d2 f7 f5 89 c3 4c 89 e0 4c 89 ef 48 89 d9 <f3> 48 ab 31 ff 44 89 fe e8 21 30 07 fd 4d 85 ff 74 3a e8 67 2c 07
RSP: 0018:ffffc900051171a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000180 RCX: 0000000000000180
RDX: 0000000000000000 RSI: 000000000001cce4 RDI: ffffc90003e89000
RBP: 0000000000000040 R08: 0000000000006000 R09: 0000000000000040
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000
R13: ffffc90003e89000 R14: ffffffffffffffff R15: 0000000000000000
FS:  00007f7a53bf66c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90003e89000 CR3: 000000002f458000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
   0:	48 31 c3             	xor    %rax,%rbx
   3:	49 89 1e             	mov    %rbx,(%r14)
   6:	eb 73                	jmp    0x7b
   8:	e8 9b 2c 07 fd       	call   0xfd072ca8
   d:	44 89 e3             	mov    %r12d,%ebx
  10:	4c 8b 64 24 08       	mov    0x8(%rsp),%r12
  15:	4c 8b 2c 24          	mov    (%rsp),%r13
  19:	89 d8                	mov    %ebx,%eax
  1b:	31 d2                	xor    %edx,%edx
  1d:	f7 f5                	div    %ebp
  1f:	89 c3                	mov    %eax,%ebx
  21:	4c 89 e0             	mov    %r12,%rax
  24:	4c 89 ef             	mov    %r13,%rdi
  27:	48 89 d9             	mov    %rbx,%rcx
* 2a:	f3 48 ab             	rep stos %rax,%es:(%rdi) <-- trapping instruction
  2d:	31 ff                	xor    %edi,%edi
  2f:	44 89 fe             	mov    %r15d,%esi
  32:	e8 21 30 07 fd       	call   0xfd073058
  37:	4d 85 ff             	test   %r15,%r15
  3a:	74 3a                	je     0x76
  3c:	e8                   	.byte 0xe8
  3d:	67 2c 07             	addr32 sub $0x7,%al