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BUG: KASAN: invalid-access in netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
BUG: KASAN: invalid-access in netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
BUG: KASAN: invalid-access in __linkwatch_run_queue+0x658/0x8d4 net/core/link_watch.c:245
Read of size 1 at addr 1cf000001da90ca9 by task kworker/u4:9/3891
Pointer tag: [1c], memory tag: [fe]

CPU: 0 UID: 0 PID: 3891 Comm: kworker/u4:9 Not tainted syzkaller #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
Workqueue: events_unbound linkwatch_event
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xac/0x288 mm/kasan/report.c:378
 print_report+0x84/0xa0 mm/kasan/report.c:482
 kasan_report+0xb0/0x110 mm/kasan/report.c:595
 kasan_tag_mismatch+0x28/0x3c mm/kasan/sw_tags.c:176
 __hwasan_tag_mismatch+0x30/0x60 arch/arm64/lib/kasan_sw_tags.S:55
 netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
 netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
 __linkwatch_run_queue+0x658/0x8d4 net/core/link_watch.c:245
 linkwatch_event+0x30/0x40 net/core/link_watch.c:304
 process_one_work+0x954/0x1a18 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0xb58/0x11b8 kernel/workqueue.c:3427
 kthread+0x794/0x9a0 kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x63f000001da93000 pfn:0x5da90
flags: 0x1fff8c000000000(node=0|zone=0|lastcpupid=0x7ff|kasantag=0xe3)
raw: 01fff8c000000000 ffffc1ffc0773008 fff0000072d718c0 0000000000000000
raw: 63f000001da93000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 fff000001da90a00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 fff000001da90b00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>fff000001da90c00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                                                 ^
 fff000001da90d00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 fff000001da90e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
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