==================================================================
BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:636 [inline]
BUG: KASAN: global-out-of-bounds in bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
BUG: KASAN: global-out-of-bounds in bit_putcs+0x7a4/0xa08 drivers/video/fbdev/core/bitblit.c:185
Read of size 1 at addr ffff800085603d70 by task syz.0.2738/12027

CPU: 0 UID: 0 PID: 12027 Comm: syz.0.2738 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:484 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xa4/0xf4 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xf4/0x5a4 mm/kasan/report.c:488
 kasan_report+0xc8/0x108 mm/kasan/report.c:601
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 __fb_pad_aligned_buffer include/linux/fb.h:636 [inline]
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
 bit_putcs+0x7a4/0xa08 drivers/video/fbdev/core/bitblit.c:185
 fbcon_putcs+0x2c0/0x3c0 drivers/video/fbdev/core/fbcon.c:1308
 do_update_region+0x15c/0x334 drivers/tty/vt/vt.c:609
 update_region+0x98/0x118 drivers/tty/vt/vt.c:633
 vcs_write+0x4e8/0xa80 drivers/tty/vt/vc_screen.c:698
 vfs_write+0x1d8/0xad0 fs/read_write.c:677
 ksys_write+0xec/0x1d8 fs/read_write.c:731
 __do_sys_write fs/read_write.c:742 [inline]
 __se_sys_write fs/read_write.c:739 [inline]
 __arm64_sys_write+0x6c/0x9c fs/read_write.c:739
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x10c/0x138 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the variable:
 type_check_kinds+0x370/0xa40

The buggy address belongs to the virtual mapping at
 [ffff8000852a0000, ffff800086a10000) created by:
 declare_kernel_vmas arch/arm64/mm/mmu.c:771 [inline]
 paging_init+0x384/0x564 arch/arm64/mm/mmu.c:815

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x45803
flags: 0x1ffc00000002000(reserved|node=0|zone=0|lastcpupid=0x7ff)
raw: 01ffc00000002000 fffffdffc01600c8 fffffdffc01600c8 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff800085603c00: 00 05 f9 f9 f9 f9 f9 f9 03 f9 f9 f9 f9 f9 f9 f9
 ffff800085603c80: 03 f9 f9 f9 f9 f9 f9 f9 03 f9 f9 f9 f9 f9 f9 f9
>ffff800085603d00: 00 07 f9 f9 f9 f9 f9 f9 00 07 f9 f9 f9 f9 f9 f9
                                                             ^
 ffff800085603d80: 00 06 f9 f9 f9 f9 f9 f9 06 f9 f9 f9 f9 f9 f9 f9
 ffff800085603e00: 00 06 f9 f9 f9 f9 f9 f9 00 00 f9 f9 f9 f9 f9 f9
==================================================================