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BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:655 [inline]
BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0xd3/0x130 drivers/video/fbdev/core/fbmem.c:115
Read of size 1 at addr ffffffff87cec2dc by task syz-executor.0/8421

CPU: 0 PID: 8421 Comm: syz-executor.0 Not tainted 5.5.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12d/0x187 lib/dump_stack.c:118
 print_address_description.constprop.8.cold.10+0x58/0x31d mm/kasan/report.c:374
 __kasan_report.cold.11+0x1b/0x3a mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:639
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132
 __fb_pad_aligned_buffer include/linux/fb.h:655 [inline]
 fb_pad_aligned_buffer+0xd3/0x130 drivers/video/fbdev/core/fbmem.c:115
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline]
 bit_putcs+0x81e/0xf00 drivers/video/fbdev/core/bitblit.c:185
 fbcon_putcs+0x313/0x530 drivers/video/fbdev/core/fbcon.c:1353
 do_update_region+0x30c/0x640 drivers/tty/vt/vt.c:677
 redraw_screen+0x54d/0x720 drivers/tty/vt/vt.c:1011
 fbcon_do_set_font+0x631/0x940 drivers/video/fbdev/core/fbcon.c:2605
 fbcon_copy_font+0x116/0x1a0 drivers/video/fbdev/core/fbcon.c:2620
 con_font_copy drivers/tty/vt/vt.c:4594 [inline]
 con_font_op+0x228/0x1210 drivers/tty/vt/vt.c:4609
 vt_ioctl+0xa2c/0x21f0 drivers/tty/vt/vt_ioctl.c:965
 tty_ioctl+0x45b/0x12f0 drivers/tty/tty_io.c:2660
 vfs_ioctl fs/ioctl.c:47 [inline]
 file_ioctl fs/ioctl.c:545 [inline]
 do_vfs_ioctl+0x196/0x1190 fs/ioctl.c:732
 ksys_ioctl+0x62/0x90 fs/ioctl.c:749
 __do_sys_ioctl fs/ioctl.c:756 [inline]
 __se_sys_ioctl fs/ioctl.c:754 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:754
 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a6f9
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2383f1ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a6f9
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000004
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2383f1b6d4
R13: 00000000004c382b R14: 00000000004d8d78 R15: 00000000ffffffff

The buggy address belongs to the variable:
 oid_index+0x93c/0xb80

Memory state around the buggy address:
 ffffffff87cec180: fa fa fa fa 00 01 fa fa fa fa fa fa 04 fa fa fa
 ffffffff87cec200: fa fa fa fa 04 fa fa fa fa fa fa fa 07 fa fa fa
>ffffffff87cec280: fa fa fa fa 04 fa fa fa fa fa fa fa 05 fa fa fa
                                                    ^
 ffffffff87cec300: fa fa fa fa 01 fa fa fa fa fa fa fa 00 00 02 fa
 ffffffff87cec380: fa fa fa fa 00 00 00 05 fa fa fa fa 00 00 00 fa
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