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BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:641 [inline]
BUG: KASAN: global-out-of-bounds in bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:95 [inline]
BUG: KASAN: global-out-of-bounds in bit_putcs+0xa63/0xde0 drivers/video/fbdev/core/bitblit.c:184
Read of size 1 at addr ffffffff8c1896f0 by task syz.0.743/8892

CPU: 1 UID: 0 PID: 8892 Comm: syz.0.743 Not tainted 6.16.0-rc6-syzkaller-00037-ge2291551827f #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x610 mm/kasan/report.c:480
 kasan_report+0xe0/0x110 mm/kasan/report.c:593
 __fb_pad_aligned_buffer include/linux/fb.h:641 [inline]
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:95 [inline]
 bit_putcs+0xa63/0xde0 drivers/video/fbdev/core/bitblit.c:184
 fbcon_putcs+0x380/0x4a0 drivers/video/fbdev/core/fbcon.c:1314
 do_update_region+0x1fb/0x3f0 drivers/tty/vt/vt.c:617
 update_region+0xc1/0x160 drivers/tty/vt/vt.c:641
 vcs_write+0x7c7/0xdb0 drivers/tty/vt/vc_screen.c:698
 vfs_write+0x2a0/0x1150 fs/read_write.c:684
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2ddd18e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2dddf70038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2ddd3b5fa0 RCX: 00007f2ddd18e929
RDX: 0000000000000032 RSI: 0000200000000540 RDI: 0000000000000009
RBP: 00007f2ddd210ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2ddd3b5fa0 R15: 00007ffd0b169a78
 </TASK>

The buggy address belongs to the variable:
 type_check_kinds+0x8b0/0xc80

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc189
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea0000306248 ffffea0000306248 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffffffff8c189580: 05 f9 f9 f9 f9 f9 f9 f9 05 f9 f9 f9 f9 f9 f9 f9
 ffffffff8c189600: 05 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 06 f9 f9 f9
>ffffffff8c189680: f9 f9 f9 f9 00 00 00 00 00 00 01 f9 f9 f9 f9 f9
                                                             ^
 ffffffff8c189700: 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9 00 00 00 00
 ffffffff8c189780: 00 00 f9 f9 f9 f9 f9 f9 00 00 00 00 00 00 00 00
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