audit: type=1804 audit(1614049086.681:32): pid=11225 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.2" name="/root/syzkaller-testdir321260373/syzkaller.AXPjvE/56/file0/file0" dev="sda1" ino=15919 res=1
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BUG: KASAN: global-out-of-bounds in soft_cursor+0x96a/0xa50 drivers/video/fbdev/core/softcursor.c:61
Read of size 1 at addr ffffffff87cf5652 by task kworker/1:2/2660

CPU: 1 PID: 2660 Comm: kworker/1:2 Not tainted 4.14.221-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient fb_flashcursor
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x5/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load1_noabort+0x68/0x70 mm/kasan/report.c:427
 soft_cursor+0x96a/0xa50 drivers/video/fbdev/core/softcursor.c:61
 bit_cursor+0xf7a/0x1580 drivers/video/fbdev/core/bitblit.c:377
 fb_flashcursor+0x356/0x3f0 drivers/video/fbdev/core/fbcon.c:373
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

The buggy address belongs to the variable:
 str__msr__trace_system_name+0xf2/0xb00

Memory state around the buggy address:
 ffffffff87cf5500: fa fa fa fa 00 03 fa fa fa fa fa fa 04 fa fa fa
 ffffffff87cf5580: fa fa fa fa 00 03 fa fa fa fa fa fa 05 fa fa fa
>ffffffff87cf5600: fa fa fa fa 00 06 fa fa fa fa fa fa 00 00 00 03
                                                 ^
 ffffffff87cf5680: fa fa fa fa 00 02 fa fa fa fa fa fa 00 00 07 fa
 ffffffff87cf5700: fa fa fa fa 00 00 07 fa fa fa fa fa 00 00 01 fa
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