syzbot

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BUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220 net/wireless/core.c:275
Read of size 8 at addr ffff8881296c8d78 by task kworker/0:4/5220

CPU: 0 UID: 0 PID: 5220 Comm: kworker/0:4 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: events cfg80211_rfkill_block_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 cfg80211_shutdown_all_interfaces+0x213/0x220 net/wireless/core.c:275
 cfg80211_rfkill_set_block net/wireless/core.c:307 [inline]
 cfg80211_rfkill_set_block net/wireless/core.c:299 [inline]
 cfg80211_rfkill_block_work+0x1e/0x30 net/wireless/core.c:319
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x56d/0x700 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8881296c8000 pfn:0x1296c8
flags: 0x200000000000000(node=0|zone=2)
raw: 0200000000000000 ffffea0004e10408 ffff8881f583e2b0 0000000000000000
raw: ffff8881296c8000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x40dc0(GFP_KERNEL|__GFP_ZERO|__GFP_COMP), pid 20766, tgid 20766 (kworker/0:12), ts 2310073925922, free_ts 2311954777373
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0xf98/0x2ce0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x259/0x21e0 mm/page_alloc.c:5148
 alloc_pages_mpol+0xe4/0x410 mm/mempolicy.c:2416
 ___kmalloc_large_node+0xed/0x160 mm/slub.c:4317
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:4348
 __do_kmalloc_node mm/slub.c:4364 [inline]
 __kmalloc_noprof.cold+0xc/0x61 mm/slub.c:4388
 kmalloc_noprof include/linux/slab.h:909 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 wiphy_new_nm+0x701/0x2160 net/wireless/core.c:470
 ieee80211_alloc_hw_nm+0x1b7a/0x2260 net/mac80211/main.c:847
 ieee80211_alloc_hw include/net/mac80211.h:4943 [inline]
 rt2x00usb_probe+0x8c/0xac0 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c:808
 usb_probe_interface+0x303/0xa40 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:959
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462
page last free pid 20766 tgid 20766 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0x78a/0xfd0 mm/page_alloc.c:2895
 device_release+0xa4/0x240 drivers/base/core.c:2565
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1e7/0x5a0 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3797
 rt2x00usb_disconnect+0x16e/0x240 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c:874
 usb_unbind_interface+0x1da/0x9e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 device_remove+0x122/0x170 drivers/base/dd.c:563
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1297
 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579
 device_del+0x396/0x9f0 drivers/base/core.c:3878
 usb_disable_device+0x355/0x7d0 drivers/usb/core/message.c:1418
 usb_disconnect+0x2e1/0x9c0 drivers/usb/core/hub.c:2344
 hub_port_connect drivers/usb/core/hub.c:5406 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x1aa2/0x5060 drivers/usb/core/hub.c:5952
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463

Memory state around the buggy address:
 ffff8881296c8c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881296c8c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881296c8d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                                ^
 ffff8881296c8d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881296c8e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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