RDX: 00000000000000a0 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fae1472b6d4
R13: 00000000004d3860 R14: 00000000004e5470 R15: 0000000000000005
==================================================================
BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:663 [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+0xc09/0xdb0 drivers/video/fbdev/core/bitblit.c:185
Read of size 1 at addr ffffffff87064760 by task syz-executor.1/15667

CPU: 1 PID: 15667 Comm: syz-executor.1 Not tainted 4.14.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x142/0x197 lib/dump_stack.c:58
 print_address_description.cold+0x5/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:427
 __fb_pad_aligned_buffer include/linux/fb.h:663 [inline]
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
 bit_putcs+0xc09/0xdb0 drivers/video/fbdev/core/bitblit.c:185
 fbcon_putcs+0x3c2/0x480 drivers/video/fbdev/core/fbcon.c:1298
 do_update_region+0x3b3/0x650 drivers/tty/vt/vt.c:373
 redraw_screen+0x589/0x7c0 drivers/tty/vt/vt.c:704
 fbcon_do_set_font+0x6d1/0x9a0 drivers/video/fbdev/core/fbcon.c:2561
 fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2576
 con_font_copy drivers/tty/vt/vt.c:4218 [inline]
 con_font_op+0x5c6/0x1060 drivers/tty/vt/vt.c:4233
 vt_ioctl+0x179f/0x2170 drivers/tty/vt/vt_ioctl.c:979
 tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a6f9
RSP: 002b:00007ff458081c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a6f9
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000008
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4580826d4
R13: 00000000004c382b R14: 00000000004d8cd8 R15: 00000000ffffffff

The buggy address belongs to the variable:
 str__msr__trace_system_name+0x200/0x9a0

Memory state around the buggy address:
 ffffffff87064600: fa fa fa fa 00 00 00 00 06 fa fa fa fa fa fa fa
 ffffffff87064680: 00 00 00 fa fa fa fa fa 00 00 00 fa fa fa fa fa
>ffffffff87064700: 00 00 00 03 fa fa fa fa 00 00 00 04 fa fa fa fa
                                                       ^
 ffffffff87064780: 00 00 00 00 03 fa fa fa fa fa fa fa 00 00 07 fa
 ffffffff87064800: fa fa fa fa 00 00 00 00 00 00 03 fa fa fa fa fa
==================================================================