kobject: 'tx-0' (0000000051ef380d): fill_kobj_path: path = '/devices/virtual/net/gretap0/queues/tx-0'
kobject: 'batman_adv' (000000005784a044): kobject_add_internal: parent: 'gretap0', set: '<NULL>'
kobject: 'erspan0' (000000000b31ea0d): kobject_add_internal: parent: 'net', set: 'devices'
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:348 [inline]
BUG: KASAN: slab-out-of-bounds in soft_cursor+0x439/0xa30 drivers/video/fbdev/core/softcursor.c:70
Read of size 16 at addr ffff88805aae1e00 by task syz-executor.3/28161

CPU: 0 PID: 28161 Comm: syz-executor.3 Not tainted 4.19.93-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+0x197/0x210 lib/dump_stack.c:118
 print_address_description.cold+0x7c/0x20d 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+0x8c/0x2ba mm/kasan/report.c:396
 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:348 [inline]
 soft_cursor+0x439/0xa30 drivers/video/fbdev/core/softcursor.c:70
 bit_cursor+0x12fc/0x1a60 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x58a/0x7b0 drivers/video/fbdev/core/fbcon.c:1369
 hide_cursor+0x9e/0x300 drivers/tty/vt/vt.c:895
 redraw_screen+0x2ee/0x8e0 drivers/tty/vt/vt.c:988
 vc_do_resize+0x118e/0x14a0 drivers/tty/vt/vt.c:1287
 vc_resize+0x4d/0x60 drivers/tty/vt/vt.c:1307
 vt_ioctl+0x1fe0/0x2530 drivers/tty/vt/vt_ioctl.c:887
 tty_ioctl+0x7f3/0x1510 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45af49
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:00007fc52dd86c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49
RDX: 0000000020000000 RSI: 000000000000560a RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc52dd876d4
R13: 00000000004c6263 R14: 00000000004dd738 R15: 00000000ffffffff

Allocated by task 9320:
 save_stack+0x45/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15d/0x750 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 fbcon_set_font+0x32d/0x860 drivers/video/fbdev/core/fbcon.c:2641
 con_font_set drivers/tty/vt/vt.c:4492 [inline]
 con_font_op+0xe18/0x1250 drivers/tty/vt/vt.c:4557
 vt_ioctl+0xd2e/0x2530 drivers/tty/vt/vt_ioctl.c:913
 tty_ioctl+0x7f3/0x1510 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 5319:
 save_stack+0x45/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcf/0x220 mm/slab.c:3822
 sctp_sysctl_net_unregister+0x67/0x80 net/sctp/sysctl.c:507
 sctp_defaults_exit+0x3a7/0x550 net/sctp/protocol.c:1338
 ops_exit_list.isra.0+0xaa/0x150 net/core/net_namespace.c:153
 setup_net+0x400/0x740 net/core/net_namespace.c:332
 copy_net_ns+0x1df/0x33c net/core/net_namespace.c:438
 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:107
 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206
 ksys_unshare+0x440/0x980 kernel/fork.c:2520
 __do_sys_unshare kernel/fork.c:2588 [inline]
 __se_sys_unshare kernel/fork.c:2586 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:2586
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88805aae16c0
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1856 bytes inside of
 2048-byte region [ffff88805aae16c0, ffff88805aae1ec0)
The buggy address belongs to the page:
page:ffffea00016ab800 count:1 mapcount:0 mapping:ffff88812c31cc40 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffffea0002951d88 ffffea00015d4e08 ffff88812c31cc40
raw: 0000000000000000 ffff88805aae05c0 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88805aae1d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805aae1d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805aae1e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88805aae1e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805aae1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
kobject: 'erspan0' (000000000b31ea0d): kobject_uevent_env
kobject: 'erspan0' (000000000b31ea0d): fill_kobj_path: path = '/devices/virtual/net/erspan0'
kobject: 'queues' (000000004cbb56ec): kobject_add_internal: parent: 'erspan0', set: '<NULL>'
kobject: 'queues' (000000004cbb56ec): kobject_uevent_env
kobject: 'queues' (000000004cbb56ec): kobject_uevent_env: filter function caused the event to drop!
kobject: 'rx-0' (00000000a1a35c87): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'rx-0' (00000000a1a35c87): kobject_uevent_env
kobject: 'rx-0' (00000000a1a35c87): fill_kobj_path: path = '/devices/virtual/net/erspan0/queues/rx-0'
kobject: 'tx-0' (00000000007ca2cb): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'tx-0' (00000000007ca2cb): kobject_uevent_env
kobject: 'tx-0' (00000000007ca2cb): fill_kobj_path: path = '/devices/virtual/net/erspan0/queues/tx-0'