==================================================================
BUG: KASAN: slab-out-of-bounds in scr_memcpyw include/linux/vt_buffer.h:49 [inline]
BUG: KASAN: slab-out-of-bounds in vc_do_resize+0xb5e/0x1af0 drivers/tty/vt/vt.c:1261
Read of size 2 at addr ffff888096a706e0 by task syz-executor.5/13681

CPU: 1 PID: 13681 Comm: syz-executor.5 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
 scr_memcpyw include/linux/vt_buffer.h:49 [inline]
 vc_do_resize+0xb5e/0x1af0 drivers/tty/vt/vt.c:1261
 vc_resize+0x4f/0x60 drivers/tty/vt/vt.c:1315
 fbcon_modechanged+0x701/0xdf0 drivers/video/fbdev/core/fbcon.c:2987
 fbcon_update_vcs+0x31/0x40 drivers/video/fbdev/core/fbcon.c:3045
 fb_set_var+0x8f5/0xdc0 drivers/video/fbdev/core/fbmem.c:1056
 do_fb_ioctl+0x55e/0x780 drivers/video/fbdev/core/fbmem.c:1109
 fb_ioctl+0xb9/0xf0 drivers/video/fbdev/core/fbmem.c:1185
 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: 0033:0x45c449
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f05ffa20c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f05ffa216d4 RCX: 000000000045c449
RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000004
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000002ef R14: 00000000004c5076 R15: 000000000076bf2c

Allocated by task 13681:
 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]
 kzalloc+0x21/0x40 include/linux/slab.h:669
 vc_do_resize+0x2af/0x1af0 drivers/tty/vt/vt.c:1198
 vc_resize+0x4f/0x60 drivers/tty/vt/vt.c:1315
 fbcon_modechanged+0x701/0xdf0 drivers/video/fbdev/core/fbcon.c:2987
 fbcon_update_vcs+0x31/0x40 drivers/video/fbdev/core/fbcon.c:3045
 fb_set_var+0x8f5/0xdc0 drivers/video/fbdev/core/fbmem.c:1056
 fbcon_resize+0x819/0x11f0 drivers/video/fbdev/core/fbcon.c:2229
 resize_screen drivers/tty/vt/vt.c:1137 [inline]
 vc_do_resize+0x478/0x1af0 drivers/tty/vt/vt.c:1216
 vc_resize+0x4f/0x60 drivers/tty/vt/vt.c:1315
 fbcon_modechanged+0x701/0xdf0 drivers/video/fbdev/core/fbcon.c:2987
 fbcon_update_vcs+0x31/0x40 drivers/video/fbdev/core/fbcon.c:3045
 fb_set_var+0x8f5/0xdc0 drivers/video/fbdev/core/fbmem.c:1056
 do_fb_ioctl+0x55e/0x780 drivers/video/fbdev/core/fbmem.c:1109
 fb_ioctl+0xb9/0xf0 drivers/video/fbdev/core/fbmem.c:1185
 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 13143:
 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_path_perm+0x6ae/0x850 security/tomoyo/file.c:842
 tomoyo_path_symlink+0x95/0xc0 security/tomoyo/tomoyo.c:206
 security_path_symlink+0xe8/0x170 security/security.c:1085
 do_symlinkat+0xee/0x3f0 fs/namei.c:4226
 __do_sys_symlink fs/namei.c:4247 [inline]
 __se_sys_symlink fs/namei.c:4245 [inline]
 __x64_sys_symlink+0x60/0x70 fs/namei.c:4245
 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 ffff888096a70680
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes to the right of
 96-byte region [ffff888096a70680, ffff888096a706e0)
The buggy address belongs to the page:
page:ffffea00025a9c00 refcount:1 mapcount:0 mapping:ffff8880aa400540 index:0xffff888096a70f80
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002a210c8 ffffea00029d5308 ffff8880aa400540
raw: ffff888096a70f80 ffff888096a70000 0000000100000005 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888096a70580: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888096a70600: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff888096a70680: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
                                                       ^
 ffff888096a70700: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888096a70780: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================