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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+0x135b/0x1a50 drivers/video/fbdev/core/bitblit.c:184
Read of size 1 at addr ffffffff8c075a10 by task syz.4.1629/11114

CPU: 1 UID: 0 PID: 11114 Comm: syz.4.1629 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 __fb_pad_aligned_buffer include/linux/fb.h:641 [inline]
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:95 [inline]
 bit_putcs+0x135b/0x1a50 drivers/video/fbdev/core/bitblit.c:184
 fbcon_putcs+0x3a6/0x580 drivers/video/fbdev/core/fbcon.c:1320
 con_putc drivers/tty/vt/vt.c:302 [inline]
 add_softcursor+0x3e3/0x510 drivers/tty/vt/vt.c:836
 set_cursor drivers/tty/vt/vt.c:866 [inline]
 con_flush_chars+0x16d/0x280 drivers/tty/vt/vt.c:3635
 con_write+0x2e/0x40 drivers/tty/vt/vt.c:3566
 do_output_char+0x64a/0x970 drivers/tty/n_tty.c:422
 process_output drivers/tty/n_tty.c:486 [inline]
 n_tty_write+0xe01/0x1200 drivers/tty/n_tty.c:2388
 iterate_tty_write drivers/tty/tty_io.c:1006 [inline]
 file_tty_write+0x559/0xa30 drivers/tty/tty_io.c:1081
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703a18eba9
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:00007f703b00a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f703a3d5fa0 RCX: 00007f703a18eba9
RDX: 0000000000000563 RSI: 0000200000002080 RDI: 0000000000000005
RBP: 00007f703a211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f703a3d6038 R14: 00007f703a3d5fa0 R15: 00007ffe46cef9d8
 </TASK>

The buggy address belongs to the variable:
 fontdata_8x16+0x1010/0x1480

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc075
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea0000301d48 ffffea0000301d48 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:
 ffffffff8c075900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff8c075980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffff8c075a00: 00 00 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
                         ^
 ffffffff8c075a80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffffffff8c075b00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
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