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BUG: KASAN: slab-out-of-bounds in soft_cursor+0x40d/0xdc0 drivers/video/fbdev/core/softcursor.c:70
Read of size 64 at addr ffff888094d35950 by task syz-executor737/8716

CPU: 0 PID: 8716 Comm: syz-executor737 Not tainted 5.6.0-rc3-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+0x1fb/0x318 lib/dump_stack.c:118
 print_address_description+0x74/0x5c0 mm/kasan/report.c:374
 __kasan_report+0x149/0x1c0 mm/kasan/report.c:506
 kasan_report+0x26/0x50 mm/kasan/common.c:641
 check_memory_region_inline mm/kasan/generic.c:182 [inline]
 check_memory_region+0x2b6/0x2f0 mm/kasan/generic.c:192
 memcpy+0x28/0x60 mm/kasan/common.c:127
 soft_cursor+0x40d/0xdc0 drivers/video/fbdev/core/softcursor.c:70
 bit_cursor+0x1930/0x23a0 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x8a4/0xc40 drivers/video/fbdev/core/fbcon.c:1409
 hide_cursor+0xa7/0x360 drivers/tty/vt/vt.c:895
 redraw_screen+0x163/0x1830 drivers/tty/vt/vt.c:999
 vc_do_resize+0x12af/0x1af0 drivers/tty/vt/vt.c:1295
 vc_resize+0x4f/0x60 drivers/tty/vt/vt.c:1315
 vt_ioctl+0x2f6d/0x3a30 drivers/tty/vt/vt_ioctl.c:891
 tty_ioctl+0xee6/0x15c0 drivers/tty/tty_io.c:2660
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:763 [inline]
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl+0x113/0x190 fs/ioctl.c:770
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:770
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440269
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd896a1588 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 8716:
 save_stack mm/kasan/common.c:72 [inline]
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc+0x118/0x1c0 mm/kasan/common.c:515
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
 __do_kmalloc mm/slab.c:3656 [inline]
 __kmalloc+0x254/0x340 mm/slab.c:3665
 kmalloc include/linux/slab.h:560 [inline]
 fbcon_set_font+0x2de/0x990 drivers/video/fbdev/core/fbcon.c:2670
 con_font_set drivers/tty/vt/vt.c:4549 [inline]
 con_font_op+0xeb9/0x1620 drivers/tty/vt/vt.c:4614
 vt_ioctl+0x23b7/0x3a30 drivers/tty/vt/vt_ioctl.c:970
 tty_ioctl+0xee6/0x15c0 drivers/tty/tty_io.c:2660
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:763 [inline]
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl+0x113/0x190 fs/ioctl.c:770
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:770
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8462:
 save_stack mm/kasan/common.c:72 [inline]
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0x12e/0x1e0 mm/kasan/common.c:476
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x10d/0x220 mm/slab.c:3757
 tomoyo_init_log+0x1d58/0x1e30 security/tomoyo/audit.c:293
 tomoyo_supervisor+0x2c3/0x1310 security/tomoyo/common.c:2097
 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline]
 tomoyo_env_perm+0x11c/0x1a0 security/tomoyo/environ.c:63
 tomoyo_environ security/tomoyo/domain.c:674 [inline]
 tomoyo_find_next_domain+0x161f/0x1cc0 security/tomoyo/domain.c:881
 tomoyo_bprm_check_security+0xe3/0x130 security/tomoyo/tomoyo.c:107
 security_bprm_check+0x50/0xb0 security/security.c:816
 search_binary_handler+0x6a/0x5e0 fs/exec.c:1649
 exec_binprm fs/exec.c:1705 [inline]
 __do_execve_file+0x153b/0x1ca0 fs/exec.c:1825
 do_execveat_common fs/exec.c:1871 [inline]
 do_execve fs/exec.c:1888 [inline]
 __do_sys_execve fs/exec.c:1964 [inline]
 __se_sys_execve fs/exec.c:1959 [inline]
 __x64_sys_execve+0x94/0xb0 fs/exec.c:1959
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff888094d34000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 6480 bytes inside of
 8192-byte region [ffff888094d34000, ffff888094d36000)
The buggy address belongs to the page:
page:ffffea0002534d00 refcount:1 mapcount:0 mapping:ffff8880aa4021c0 index:0x0 compound_mapcount: 0
flags: 0xfffe0000010200(slab|head)
raw: 00fffe0000010200 ffffea00029e2c08 ffffea0002519b08 ffff8880aa4021c0
raw: 0000000000000000 ffff888094d34000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888094d35800: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888094d35880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888094d35900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                 ^
 ffff888094d35980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888094d35a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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