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 __fb_pad_aligned_buffer include/linux/fb.h:674 [inline]
BUG: KASAN: global-out-of-bounds in bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
BUG: KASAN: global-out-of-bounds in bit_putcs+0xbaf/0xd10 drivers/video/fbdev/core/bitblit.c:185
Read of size 1 at addr ffffffff87cd730e by task syz-executor.0/6915

CPU: 0 PID: 6915 Comm: syz-executor.0 Not tainted 4.19.134-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+0x5/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430
 __fb_pad_aligned_buffer include/linux/fb.h:674 [inline]
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
 bit_putcs+0xbaf/0xd10 drivers/video/fbdev/core/bitblit.c:185
 fbcon_putcs+0x336/0x4f0 drivers/video/fbdev/core/fbcon.c:1323
 do_update_region+0x399/0x630 drivers/tty/vt/vt.c:683
 redraw_screen+0x5e1/0x870 drivers/tty/vt/vt.c:1031
 fbcon_do_set_font+0x734/0xa30 drivers/video/fbdev/core/fbcon.c:2586
 fbcon_copy_font+0x125/0x190 drivers/video/fbdev/core/fbcon.c:2601
 con_font_copy drivers/tty/vt/vt.c:4585 [inline]
 con_font_op+0x637/0x10e0 drivers/tty/vt/vt.c:4600
 vt_ioctl+0x167e/0x24d0 drivers/tty/vt/vt_ioctl.c:980
 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: 0033:0x45c369
Code: 8d 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fae14623c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000f540 RCX: 000000000045c369
RDX: 0000000020000480 RSI: 0000000000004b72 RDI: 0000000000000008
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffe3658c76f R14: 00007fae146249c0 R15: 000000000078bf0c

The buggy address belongs to the variable:
 oid_index+0x4ce/0xa60

Memory state around the buggy address:
 ffffffff87cd7200: fa fa fa fa 00 07 fa fa fa fa fa fa 00 07 fa fa
 ffffffff87cd7280: fa fa fa fa 06 fa fa fa fa fa fa fa 00 00 00 04
>ffffffff87cd7300: fa fa fa fa 00 00 fa fa fa fa fa fa 00 00 06 fa
                      ^
 ffffffff87cd7380: fa fa fa fa 00 00 01 fa fa fa fa fa 00 00 00 00
 ffffffff87cd7400: fa fa fa fa 00 00 00 fa fa fa fa fa 00 01 fa fa
==================================================================