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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+0xbce/0x1790 drivers/tty/vt/vt.c:1291
Read of size 2 at addr ffff8880a8fdcc90 by task syz-executor.1/16416

CPU: 1 PID: 16416 Comm: syz-executor.1 Not tainted 5.8.0-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+0x1f0/0x31e lib/dump_stack.c:118
 print_address_description+0x66/0x620 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report+0x132/0x1d0 mm/kasan/report.c:530
 check_memory_region_inline mm/kasan/generic.c:183 [inline]
 check_memory_region+0x2b5/0x2f0 mm/kasan/generic.c:192
 memcpy+0x25/0x60 mm/kasan/common.c:105
 scr_memcpyw include/linux/vt_buffer.h:49 [inline]
 vc_do_resize+0xbce/0x1790 drivers/tty/vt/vt.c:1291
 fbcon_modechanged+0x710/0xd90 drivers/video/fbdev/core/fbcon.c:2990
 fb_set_var+0x825/0xcc0 drivers/video/fbdev/core/fbmem.c:1056
 do_fb_ioctl+0x502/0x6f0 drivers/video/fbdev/core/fbmem.c:1109
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ce69
Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f338ba1cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000d580 RCX: 000000000045ce69
RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003
RBP: 000000000118c000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfcc
R13: 00007ffc12c4caff R14: 00007f338ba1d9c0 R15: 000000000118bfcc

Allocated by task 16416:
 kasan_save_stack mm/kasan/common.c:48 [inline]
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc+0x100/0x130 mm/kasan/common.c:461
 __do_kmalloc mm/slab.c:3655 [inline]
 __kmalloc+0x218/0x320 mm/slab.c:3664
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc+0x1d/0x40 include/linux/slab.h:666
 vc_do_resize+0x2a7/0x1790 drivers/tty/vt/vt.c:1228
 fbcon_modechanged+0x710/0xd90 drivers/video/fbdev/core/fbcon.c:2990
 fb_set_var+0x825/0xcc0 drivers/video/fbdev/core/fbmem.c:1056
 fbcon_resize+0x7bb/0xff0 drivers/video/fbdev/core/fbcon.c:2231
 resize_screen drivers/tty/vt/vt.c:1175 [inline]
 vc_do_resize+0x738/0x1790 drivers/tty/vt/vt.c:1246
 fbcon_modechanged+0x710/0xd90 drivers/video/fbdev/core/fbcon.c:2990
 fb_set_var+0x825/0xcc0 drivers/video/fbdev/core/fbmem.c:1056
 do_fb_ioctl+0x502/0x6f0 drivers/video/fbdev/core/fbmem.c:1109
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8880a8fdcc00
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 144 bytes inside of
 192-byte region [ffff8880a8fdcc00, ffff8880a8fdccc0)
The buggy address belongs to the page:
page:00000000fa1b76b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa8fdc
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002772688 ffffea00024c9788 ffff8880aa440000
raw: 0000000000000000 ffff8880a8fdc000 0000000100000010 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a8fdcb80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8880a8fdcc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880a8fdcc80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                         ^
 ffff8880a8fdcd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880a8fdcd80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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