^
 ffff88009b575c00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88009b575c80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
==================================================================
Disabling lock debugging due to kernel taint
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 208 Comm: kworker/u4:3 Tainted: G    B             4.19.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x15a/0x20a lib/dump_stack.c:113
 panic+0x1c6/0x36b kernel/panic.c:184
 kasan_end_report+0x47/0x4f mm/kasan/report.c:180
 kasan_report_error mm/kasan/report.c:359 [inline]
 kasan_report.cold.7+0x76/0x307 mm/kasan/report.c:412
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x13c/0x1b0 mm/kasan/kasan.c:267
 memcpy+0x23/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:345 [inline]
 batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:724 [inline]
 batadv_iv_ogm_queue_add+0x326/0xe50 net/batman-adv/bat_iv_ogm.c:820
 batadv_iv_ogm_schedule+0xb7e/0xf30 net/batman-adv/bat_iv_ogm.c:989
 batadv_iv_send_outstanding_bat_ogm_packet+0x4b2/0x7b0 net/batman-adv/bat_iv_ogm.c:1817
 process_one_work+0x7b9/0x15a0 kernel/workqueue.c:2153
 worker_thread+0x85/0xb60 kernel/workqueue.c:2296
 kthread+0x324/0x3e0 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:413
Kernel Offset: disabled
Rebooting in 86400 seconds..