QAT: Invalid ioctl
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:373 [inline]
BUG: KASAN: slab-out-of-bounds in soft_cursor+0x44b/0xa30 drivers/video/fbdev/core/softcursor.c:70
Read of size 9 at addr ffff88804c1d5a0b by task syz-executor.0/15559

CPU: 1 PID: 15559 Comm: syz-executor.0 Not tainted 4.19.136-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+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report+0x8f/0x96 mm/kasan/report.c:412
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:373 [inline]
 soft_cursor+0x44b/0xa30 drivers/video/fbdev/core/softcursor.c:70
 bit_cursor+0x1239/0x1820 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x555/0x760 drivers/video/fbdev/core/fbcon.c:1372
 hide_cursor+0x85/0x2c0 drivers/tty/vt/vt.c:902
 redraw_screen+0x2ed/0x870 drivers/tty/vt/vt.c:1006
 vc_do_resize+0x1137/0x1440 drivers/tty/vt/vt.c:1323
 vt_ioctl+0x1f74/0x24d0 drivers/tty/vt/vt_ioctl.c:901
 tty_ioctl+0x5b0/0x15c0 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45cc79
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:00007f30460dac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000001c300 RCX: 000000000045cc79
RDX: 0000000020000040 RSI: 000000000000560a RDI: 0000000000000005
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffc336126bf R14: 00007f30460db9c0 R15: 000000000078bf0c

Allocated by task 27990:
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15a/0x3c0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 fbcon_set_font+0x34f/0x8a0 drivers/video/fbdev/core/fbcon.c:2644
 con_font_set drivers/tty/vt/vt.c:4536 [inline]
 con_font_op+0xd02/0x10e0 drivers/tty/vt/vt.c:4601
 vt_ioctl+0x116d/0x24d0 drivers/tty/vt/vt_ioctl.c:928
 tty_ioctl+0x5b0/0x15c0 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 27092:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 qdisc_free net/sched/sch_generic.c:958 [inline]
 qdisc_destroy+0x4f1/0x780 net/sched/sch_generic.c:998
 dev_shutdown+0x2b2/0x48b net/sched/sch_generic.c:1301
 rollback_registered_many+0x689/0xde0 net/core/dev.c:8180
 unregister_netdevice_many.part.0+0x1a/0x300 net/core/dev.c:9310
 unregister_netdevice_many+0x36/0x50 net/core/dev.c:9309
 rtnl_newlink+0x12fd/0x15b0 net/core/rtnetlink.c:3185
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4778
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:632
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2115
 __sys_sendmsg net/socket.c:2153 [inline]
 __do_sys_sendmsg net/socket.c:2162 [inline]
 __se_sys_sendmsg net/socket.c:2160 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88804c1d5680
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 907 bytes inside of
 1024-byte region [ffff88804c1d5680, ffff88804c1d5a80)
The buggy address belongs to the page:
page:ffffea0001307500 count:1 mapcount:0 mapping:ffff88812c39cac0 index:0xffff88804c1d4d80 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffffea000123a988 ffffea000294d908 ffff88812c39cac0
raw: ffff88804c1d4d80 ffff88804c1d4000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88804c1d5900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88804c1d5980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88804c1d5a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff88804c1d5a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88804c1d5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
QAT: Invalid ioctl