IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
batman_adv: batadv0: Interface activated: batadv_slave_1
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
==================================================================
BUG: KASAN: global-out-of-bounds in vga_8planes_imageblit drivers/video/fbdev/vga16fb.c:1141 [inline]
BUG: KASAN: global-out-of-bounds in vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1204 [inline]
BUG: KASAN: global-out-of-bounds in vga16fb_imageblit+0x1bf9/0x2160 drivers/video/fbdev/vga16fb.c:1261
Read of size 2 at addr ffffffff86c8c15e by task syz-executor.0/6596

CPU: 1 PID: 6596 Comm: syz-executor.0 Not tainted 4.14.184-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+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x5/0x1dc 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+0xa9/0x2b9 mm/kasan/report.c:393
 vga_8planes_imageblit drivers/video/fbdev/vga16fb.c:1141 [inline]
 vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1204 [inline]
 vga16fb_imageblit+0x1bf9/0x2160 drivers/video/fbdev/vga16fb.c:1261
 soft_cursor+0x50d/0xa40 drivers/video/fbdev/core/softcursor.c:74
 bit_cursor+0x1072/0x1660 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x4b1/0x690 drivers/video/fbdev/core/fbcon.c:1350
 set_cursor drivers/tty/vt/vt.c:603 [inline]
 set_cursor+0x189/0x1e0 drivers/tty/vt/vt.c:594
 redraw_screen+0x56f/0x760 drivers/tty/vt/vt.c:707
 vc_do_resize+0xbe0/0xde0 drivers/tty/vt/vt.c:967
 fbcon_modechanged+0x361/0x800 drivers/video/fbdev/core/fbcon.c:2938
 fbcon_event_notify+0x11a/0x1750 drivers/video/fbdev/core/fbcon.c:3302
 notifier_call_chain+0x107/0x1a0 kernel/notifier.c:93
 __blocking_notifier_call_chain kernel/notifier.c:317 [inline]
 __blocking_notifier_call_chain kernel/notifier.c:304 [inline]
 blocking_notifier_call_chain kernel/notifier.c:328 [inline]
 blocking_notifier_call_chain+0x79/0x90 kernel/notifier.c:325
 fb_set_var+0xaad/0xc70 drivers/video/fbdev/core/fbmem.c:1054
 do_fb_ioctl+0x3cc/0x840 drivers/video/fbdev/core/fbmem.c:1127
 fb_ioctl+0xda/0x120 drivers/video/fbdev/core/fbmem.c:1242
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007f89c5e87c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e55e0 RCX: 000000000045cb29
RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000002fd R14: 00000000004c58a5 R15: 00007f89c5e886d4

The buggy address belongs to the variable:
 transl_h+0x3e/0x40

Memory state around the buggy address:
 ffffffff86c8c000: 00 03 fa fa fa fa fa fa 00 00 00 00 fa fa fa fa
 ffffffff86c8c080: 00 00 00 00 00 fa fa fa fa fa fa fa 04 fa fa fa
>ffffffff86c8c100: fa fa fa fa 00 00 00 00 fa fa fa fa 00 00 00 00
                                                    ^
 ffffffff86c8c180: fa fa fa fa 00 01 fa fa fa fa fa fa 00 00 00 04
 ffffffff86c8c200: fa fa fa fa 00 00 04 fa fa fa fa fa 00 00 00 00
==================================================================