vivid-002: ==================  END STATUS  ==================
net_ratelimit: 26 callbacks suppressed
ip_tables: iptables: counters copy to user failed while replacing table
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in fbcon_get_font+0x288/0x550 drivers/video/fbdev/core/fbcon.c:2421
Read of size 2 at addr ffff88809b5d5450 by task syz-executor.4/7997

CPU: 0 PID: 7997 Comm: syz-executor.4 Not tainted 4.14.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x142/0x197 lib/dump_stack.c:58
 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x123/0x190 mm/kasan/kasan.c:267
 memcpy+0x24/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:347 [inline]
 fbcon_get_font+0x288/0x550 drivers/video/fbdev/core/fbcon.c:2421
 con_font_get drivers/tty/vt/vt.c:4078 [inline]
 con_font_op+0x1d5/0x1060 drivers/tty/vt/vt.c:4229
 vt_ioctl+0x179f/0x2170 drivers/tty/vt/vt_ioctl.c:979
 tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007f89a0821c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f89a08226d4 RCX: 000000000045b399
RDX: 0000000020000600 RSI: 0000000000004b72 RDI: 0000000000000007
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000367 R14: 00000000004c48e2 R15: 000000000075bf2c

Allocated by task 8065:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15d/0x7a0 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 fbcon_set_font+0x2f8/0x7b0 drivers/video/fbdev/core/fbcon.c:2618
 con_font_set drivers/tty/vt/vt.c:4162 [inline]
 con_font_op+0xc0f/0x1060 drivers/tty/vt/vt.c:4227
 vt_ioctl+0xb80/0x2170 drivers/tty/vt/vt_ioctl.c:927
 tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 7093:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcc/0x270 mm/slab.c:3815
 skb_free_head+0x8b/0xb0 net/core/skbuff.c:554
 skb_release_data+0x543/0x7c0 net/core/skbuff.c:574
 skb_release_all+0x4d/0x60 net/core/skbuff.c:631
 __kfree_skb net/core/skbuff.c:645 [inline]
 consume_skb+0xaf/0x340 net/core/skbuff.c:705
 netlink_broadcast_filtered+0x2ae/0x9e0 net/netlink/af_netlink.c:1488
 kobject_uevent_env+0x85a/0xc80 lib/kobject_uevent.c:495
 kobject_uevent+0x20/0x30 lib/kobject_uevent.c:553
 netdev_queue_add_kobject net/core/net-sysfs.c:1347 [inline]
 netdev_queue_update_kobjects+0x295/0x360 net/core/net-sysfs.c:1364
 register_queue_kobjects net/core/net-sysfs.c:1406 [inline]
 netdev_register_kobject+0x28a/0x3a0 net/core/net-sysfs.c:1612
 register_netdevice+0x814/0xcd0 net/core/dev.c:7660
 veth_newlink+0x4c8/0x900 drivers/net/veth.c:443
 rtnl_newlink+0xecb/0x1700 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3da/0xb70 net/core/rtnetlink.c:4315
 netlink_rcv_skb+0x14f/0x3c0 net/netlink/af_netlink.c:2432
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4327
 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
 netlink_unicast+0x44d/0x650 net/netlink/af_netlink.c:1312
 netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xce/0x110 net/socket.c:656
 SYSC_sendto+0x206/0x310 net/socket.c:1763
 SyS_sendto+0x40/0x50 net/socket.c:1731
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff88809b5d5340
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 272 bytes inside of
 512-byte region [ffff88809b5d5340, ffff88809b5d5540)
The buggy address belongs to the page:
page:ffffea00026d7540 count:1 mapcount:0 mapping:ffff88809b5d50c0 index:0xffff88809b5d50c0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffff88809b5d50c0 ffff88809b5d50c0 0000000100000002
raw: ffffea00026465a0 ffffea00021f76e0 ffff8880aa800940 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809b5d5300: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff88809b5d5380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88809b5d5400: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
                                                 ^
 ffff88809b5d5480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809b5d5500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================