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BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:674 [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+0xbaf/0xd10 drivers/video/fbdev/core/bitblit.c:185
Read of size 1 at addr ffffffff88b65d54 by task syz-executor.1/22999

CPU: 1 PID: 22999 Comm: syz-executor.1 Not tainted 4.19.160-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+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x5/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430
 __fb_pad_aligned_buffer include/linux/fb.h:674 [inline]
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
 bit_putcs+0xbaf/0xd10 drivers/video/fbdev/core/bitblit.c:185
 fbcon_putcs+0x336/0x4f0 drivers/video/fbdev/core/fbcon.c:1269
 do_update_region+0x2d0/0x630 drivers/tty/vt/vt.c:673
 update_region+0x144/0x190 drivers/tty/vt/vt.c:701
 vcs_write+0x403/0xc30 drivers/tty/vt/vc_screen.c:604
 __vfs_write+0xf7/0x770 fs/read_write.c:485
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45deb9
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f784e8ffc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000003a000 RCX: 000000000045deb9
RDX: 0000000000000030 RSI: 0000000020000400 RDI: 0000000000000008
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffe92f8d46f R14: 00007f784e9009c0 R15: 000000000118bf2c

The buggy address belongs to the variable:
 __func__.0+0x34/0x40

Memory state around the buggy address:
 ffffffff88b65c00: 00 01 fa fa fa fa fa fa 00 00 00 00 01 fa fa fa
 ffffffff88b65c80: fa fa fa fa 00 00 00 05 fa fa fa fa 00 00 00 00
>ffffffff88b65d00: fa fa fa fa 00 03 fa fa fa fa fa fa 04 fa fa fa
                                                 ^
 ffffffff88b65d80: fa fa fa fa 00 03 fa fa fa fa fa fa 05 fa fa fa
 ffffffff88b65e00: fa fa fa fa 00 06 fa fa fa fa fa fa 00 00 00 03
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