ffff88809b9c0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809b9c0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Disabling lock debugging due to kernel taint
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 21 Comm: kworker/u4:1 Tainted: G    B             5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: gid-cache-wq netdevice_event_work_handler
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x9a/0xcc lib/dump_stack.c:118
 panic+0x2bb/0x554 kernel/panic.c:231
 end_report+0x58/0x5e mm/kasan/report.c:106
 __kasan_report mm/kasan/report.c:552 [inline]
 kasan_report.cold+0xd/0x37 mm/kasan/report.c:562
 dev_put include/linux/netdevice.h:3891 [inline]
 netdevice_event_work_handler+0x139/0x1b0 drivers/infiniband/core/roce_gid_mgmt.c:630
 process_one_work+0x75b/0x1230 kernel/workqueue.c:2269
 worker_thread+0x598/0xf80 kernel/workqueue.c:2415
 kthread+0x373/0x450 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Kernel Offset: disabled
Rebooting in 86400 seconds..