wlan0 speed is unknown, defaulting to 1000
==================================================================
BUG: KASAN: use-after-free in siw_query_port+0x342/0x430 drivers/infiniband/sw/siw/siw_verbs.c:175
Read of size 4 at addr ffff88805ff940d8 by task kworker/0:6/4212

CPU: 0 PID: 4212 Comm: kworker/0:6 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: infiniband ib_cache_event_task
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 siw_query_port+0x342/0x430 drivers/infiniband/sw/siw/siw_verbs.c:175
 ib_cache_update+0x1a8/0xaf0 drivers/infiniband/core/cache.c:1477
 ib_cache_event_task+0xef/0x1e0 drivers/infiniband/core/cache.c:1551
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

The buggy address belongs to the page:
page:ffffea00017fe500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5ff94
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x102a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_HARDWALL), pid 0, ts 100440854013, free_ts 100381989388
 create_dummy_stack mm/page_owner.c:59 [inline]
 register_dummy_stack+0x86/0xe0 mm/page_owner.c:65
 init_page_owner+0x30/0x730 mm/page_owner.c:83
 kernel_init_freeable+0x420/0x5c0 init/main.c:1613
 kernel_init+0x19/0x290 init/main.c:1506
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
 free_nonslab_page+0xe4/0x150 mm/slub.c:3535
 kfree+0x1cf/0x270 mm/slub.c:4556
 device_release+0x91/0x1c0
 kobject_cleanup lib/kobject.c:713 [inline]
 kobject_release lib/kobject.c:744 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x224/0x460 lib/kobject.c:761
 netdev_run_todo+0xaaf/0xc40 net/core/dev.c:10670
 ieee80211_unregister_hw+0x5a/0x220 net/mac80211/main.c:1401
 mac80211_hwsim_del_radio+0x2bb/0x4a0 drivers/net/wireless/mac80211_hwsim.c:3473
 hwsim_exit_net+0x5b8/0x660 drivers/net/wireless/mac80211_hwsim.c:4243
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x7f1/0xc90 net/core/net_namespace.c:618
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Memory state around the buggy address:
 ffff88805ff93f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805ff94000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88805ff94080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                    ^
 ffff88805ff94100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88805ff94180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================