block nbd5: shutting down sockets
ldm_validate_partition_table(): Disk read failed.
Dev nbd5: unable to read RDB block 0
 nbd5: unable to read partition table
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:348 [inline]
BUG: KASAN: slab-out-of-bounds in soft_cursor+0x448/0xa20 drivers/video/fbdev/core/softcursor.c:70
Read of size 3 at addr ffff8880984758d1 by task syz-executor.0/23940

CPU: 1 PID: 23940 Comm: syz-executor.0 Not tainted 4.19.113-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+0x188/0x20d lib/dump_stack.c:118
 print_address_description.cold+0x7c/0x212 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x88/0x2b9 mm/kasan/report.c:396
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:348 [inline]
 soft_cursor+0x448/0xa20 drivers/video/fbdev/core/softcursor.c:70
 bit_cursor+0x1230/0x1900 drivers/video/fbdev/core/bitblit.c:386
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'.
 fbcon_cursor+0x572/0x760 drivers/video/fbdev/core/fbcon.c:1369
 hide_cursor+0x99/0x2f0 drivers/tty/vt/vt.c:895
 redraw_screen+0x2ed/0x870 drivers/tty/vt/vt.c:999
 vc_do_resize+0x109e/0x13a0 drivers/tty/vt/vt.c:1298
 vt_ioctl+0x1dff/0x2310 drivers/tty/vt/vt_ioctl.c:891
 tty_ioctl+0x7a1/0x1420 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcda/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: 0033:0x45c849
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:00007fd5f82bec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd5f82bf6d4 RCX: 000000000045c849
RDX: 0000000020000100 RSI: 000000000000560a RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000066a R14: 00000000004c93e6 R15: 000000000076bf0c

Allocated by task 10893:
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15b/0x770 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 fbcon_set_font+0x331/0x870 drivers/video/fbdev/core/fbcon.c:2641
 con_font_set drivers/tty/vt/vt.c:4501 [inline]
 con_font_op+0xd3e/0x1130 drivers/tty/vt/vt.c:4566
 vt_ioctl+0xc6c/0x2310 drivers/tty/vt/vt_ioctl.c:918
 tty_ioctl+0x7a1/0x1420 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcda/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 8098:
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/kasan.c:521
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xce/0x220 mm/slab.c:3822
 skb_free_head+0x91/0xb0 net/core/skbuff.c:554
 skb_release_data+0x600/0x8c0 net/core/skbuff.c:574
 skb_release_all+0x46/0x60 net/core/skbuff.c:631
 __kfree_skb net/core/skbuff.c:645 [inline]
 kfree_skb net/core/skbuff.c:663 [inline]
 kfree_skb+0xe1/0x390 net/core/skbuff.c:657
 skb_queue_purge+0x14/0x30 net/core/skbuff.c:2858
 netlink_sock_destruct+0x101/0x280 net/netlink/af_netlink.c:403
 __sk_destruct+0x4c/0x780 net/core/sock.c:1558
 sk_destruct+0xb9/0xf0 net/core/sock.c:1598
 __sk_free+0xc2/0x2e0 net/core/sock.c:1609
 sk_free+0x3b/0x50 net/core/sock.c:1620
 deferred_put_nlk_sk+0x10d/0x280 net/netlink/af_netlink.c:743
 __rcu_reclaim kernel/rcu/rcu.h:236 [inline]
 rcu_do_batch kernel/rcu/tree.c:2584 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0xb2d/0x17f0 kernel/rcu/tree.c:2881
 __do_softirq+0x26c/0x93c kernel/softirq.c:292

The buggy address belongs to the object at ffff888098475780
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 337 bytes inside of
 512-byte region [ffff888098475780, ffff888098475980)
The buggy address belongs to the page:
page:ffffea0002611d40 count:1 mapcount:0 mapping:ffff88812c3dc940 index:0x0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffffea0002922c48 ffffea00015e4e08 ffff88812c3dc940
raw: 0000000000000000 ffff888098475000 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888098475780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888098475800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888098475880: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                 ^
 ffff888098475900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888098475980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================