audit: type=1400 audit(1583396784.019:36): avc:  denied  { map } for  pid=7462 comm="syz-executor451" path="/root/syz-executor451363011" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in soft_cursor+0x445/0xa40 drivers/video/fbdev/core/softcursor.c:70
Read of size 64 at addr ffff88809e4f31d0 by task syz-executor451/7462

CPU: 1 PID: 7462 Comm: syz-executor451 Not tainted 4.14.172-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+0x13e/0x194 lib/dump_stack.c:58
 print_address_description.cold+0x7c/0x1e2 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+0xa9/0x2ae mm/kasan/report.c:393
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:347 [inline]
 soft_cursor+0x445/0xa40 drivers/video/fbdev/core/softcursor.c:70
 bit_cursor+0x10d9/0x1700 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x4be/0x690 drivers/video/fbdev/core/fbcon.c:1347
 hide_cursor+0x96/0x2d0 drivers/tty/vt/vt.c:589
 redraw_screen+0x2a1/0x770 drivers/tty/vt/vt.c:679
 vc_do_resize+0xbf8/0xe10 drivers/tty/vt/vt.c:954
 vt_ioctl+0x1a08/0x1f00 drivers/tty/vt/vt_ioctl.c:891
 tty_ioctl+0x6c5/0x1220 drivers/tty/tty_io.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x440269
RSP: 002b:00007ffc4393a258 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269
RDX: 0000000020000080 RSI: 000000000000560a RDI: 0000000000000004
RBP: 00000000006cb018 R08: 0000000000000001 R09: 00000000004002c8
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000401b50
R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 7462:
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15b/0x7c0 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 fbcon_set_font+0x2f8/0x7c0 drivers/video/fbdev/core/fbcon.c:2618
 con_font_set drivers/tty/vt/vt.c:4162 [inline]
 con_font_op+0xb73/0xf70 drivers/tty/vt/vt.c:4227
 vt_ioctl+0x1334/0x1f00 drivers/tty/vt/vt_ioctl.c:970
 tty_ioctl+0x6c5/0x1220 drivers/tty/tty_io.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88809e4f1880
 which belongs to the cache kmalloc-8192 of size 8192
The buggy address is located 6480 bytes inside of
 8192-byte region [ffff88809e4f1880, ffff88809e4f3880)
The buggy address belongs to the page:
page:ffffea0002793c00 count:1 mapcount:0 mapping:ffff88809e4f1880 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff88809e4f1880 0000000000000000 0000000100000001
raw: ffffea00026fbc20 ffffea00027c9520 ffff88812fe55080 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809e4f3080: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809e4f3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809e4f3180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                 ^
 ffff88809e4f3200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809e4f3280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================