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Bluetooth: hci4: command 0x0405 tx timeout
Bluetooth: hci4: link tx timeout
Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa
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BUG: KASAN: slab-use-after-free in hci_disconnect+0x200/0x230 net/bluetooth/hci_conn.c:188
Read of size 4 at addr ffff88805963803c by task kworker/u9:4/5828

CPU: 1 UID: 0 PID: 5828 Comm: kworker/u9:4 Not tainted 6.13.0-syzkaller-08265-g9c5968db9e62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: hci4 hci_tx_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+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 hci_disconnect+0x200/0x230 net/bluetooth/hci_conn.c:188
 hci_link_tx_to net/bluetooth/hci_core.c:3406 [inline]
 __check_timeout net/bluetooth/hci_core.c:3547 [inline]
 __check_timeout+0x3ed/0x720 net/bluetooth/hci_core.c:3527
 hci_sched_le net/bluetooth/hci_core.c:3664 [inline]
 hci_tx_work+0x6e3/0x1410 net/bluetooth/hci_core.c:3737
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 5828:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 __hci_conn_add+0x131/0x1ab0 net/bluetooth/hci_conn.c:935
 hci_conn_add_unset+0x6d/0x100 net/bluetooth/hci_conn.c:1045
 le_conn_complete_evt+0x798/0x1da0 net/bluetooth/hci_event.c:5637
 hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5789
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7162
 hci_event_func net/bluetooth/hci_event.c:7470 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7525
 hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4015
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 5132:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free mm/slub.c:4609 [inline]
 kfree+0x2c4/0x4d0 mm/slub.c:4757
 device_release+0xa1/0x240 drivers/base/core.c:2567
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1e4/0x5a0 lib/kobject.c:737
 put_device drivers/base/core.c:3773 [inline]
 device_unregister+0x2f/0xc0 drivers/base/core.c:3896
 hci_conn_del_sysfs+0xab/0x170 net/bluetooth/hci_sysfs.c:79
 hci_conn_cleanup net/bluetooth/hci_conn.c:174 [inline]
 hci_conn_del+0x54e/0xdb0 net/bluetooth/hci_conn.c:1164
 hci_conn_failed+0x2a6/0x3e0 net/bluetooth/hci_conn.c:1267
 hci_abort_conn_sync+0x91c/0xfe0 net/bluetooth/hci_sync.c:5588
 abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:3023
 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:332
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff888059638000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 60 bytes inside of
 freed 8192-byte region [ffff888059638000, ffff88805963a000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x59638
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b042280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b042280 dead000000000122 0000000000000000
head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0001658e01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5828, tgid 5828 (kworker/u9:4), ts 59247404335, free_ts 13699901497
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4739
 alloc_pages_mpol+0x1fc/0x540 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:2423 [inline]
 allocate_slab mm/slub.c:2587 [inline]
 new_slab+0x23d/0x330 mm/slub.c:2640
 ___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
 __slab_alloc_node mm/slub.c:3991 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 __kmalloc_cache_noprof+0xfa/0x410 mm/slub.c:4320
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 __hci_conn_add+0x131/0x1ab0 net/bluetooth/hci_conn.c:935
 hci_conn_add_unset+0x6d/0x100 net/bluetooth/hci_conn.c:1045
 le_conn_complete_evt+0x798/0x1da0 net/bluetooth/hci_event.c:5637
 hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5789
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7162
 hci_event_func net/bluetooth/hci_event.c:7470 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7525
 hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4015
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
page last free pid 1 tgid 1 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
 free_contig_range+0x133/0x3f0 mm/page_alloc.c:6678
 destroy_args+0x66f/0x830 mm/debug_vm_pgtable.c:1017
 debug_vm_pgtable+0x130f/0x2d60 mm/debug_vm_pgtable.c:1397
 do_one_initcall+0x128/0x700 init/main.c:1257
 do_initcall_level init/main.c:1319 [inline]
 do_initcalls init/main.c:1335 [inline]
 do_basic_setup init/main.c:1354 [inline]
 kernel_init_freeable+0x5c7/0x900 init/main.c:1568
 kernel_init+0x1c/0x2b0 init/main.c:1457
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff888059637f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888059637f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888059638000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888059638080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888059638100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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