BUG: sleeping function called from invalid context at kernel/locking/mutex.c:585
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 21876, name: kworker/u9:3
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
4 locks held by kworker/u9:3/21876:
 #0: ffff88807bbee948 ((wq_completion)hci5#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 #0: ffff88807bbee948 ((wq_completion)hci5#2){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc9000a0bfd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc9000a0bfd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffff888073648078 (&hdev->lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0xcf/0xae0 net/bluetooth/hci_event.c:6853
 #3: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #3: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: hci_le_create_big_complete_evt+0xdb/0xae0 net/bluetooth/hci_event.c:6854
CPU: 0 UID: 0 PID: 21876 Comm: kworker/u9:3 Not tainted 6.11.0-rc3-syzkaller-00066-g1fb918967b56 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: hci5 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 __might_resched+0x5d4/0x780 kernel/sched/core.c:8463
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0xc1/0xd70 kernel/locking/mutex.c:752
 hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline]
 hci_le_create_big_complete_evt+0x3d9/0xae0 net/bluetooth/hci_event.c:6878
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0xa55/0x1540 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4022
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

=============================
[ BUG: Invalid wait context ]
6.11.0-rc3-syzkaller-00066-g1fb918967b56 #0 Tainted: G        W         
-----------------------------
kworker/u9:3/21876 is trying to lock:
ffffffff8fbdbbe8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline]
ffffffff8fbdbbe8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0x3d9/0xae0 net/bluetooth/hci_event.c:6878
other info that might help us debug this:
context-{4:4}
4 locks held by kworker/u9:3/21876:
 #0: ffff88807bbee948 ((wq_completion)hci5#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 #0: ffff88807bbee948 ((wq_completion)hci5#2){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc9000a0bfd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc9000a0bfd00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffff888073648078 (&hdev->lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0xcf/0xae0 net/bluetooth/hci_event.c:6853
 #3: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #3: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: hci_le_create_big_complete_evt+0xdb/0xae0 net/bluetooth/hci_event.c:6854
stack backtrace:
CPU: 0 UID: 0 PID: 21876 Comm: kworker/u9:3 Tainted: G        W          6.11.0-rc3-syzkaller-00066-g1fb918967b56 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: hci5 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4750 [inline]
 check_wait_context kernel/locking/lockdep.c:4820 [inline]
 __lock_acquire+0x153b/0x2040 kernel/locking/lockdep.c:5092
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
 __mutex_lock_common kernel/locking/mutex.c:608 [inline]
 __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752
 hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline]
 hci_le_create_big_complete_evt+0x3d9/0xae0 net/bluetooth/hci_event.c:6878
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0xa55/0x1540 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4022
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
==================================================================
BUG: KASAN: slab-use-after-free in hci_le_create_big_complete_evt+0x383/0xae0
Read of size 8 at addr ffff888074c5c000 by task kworker/u9:3/21876

CPU: 0 UID: 0 PID: 21876 Comm: kworker/u9:3 Tainted: G        W          6.11.0-rc3-syzkaller-00066-g1fb918967b56 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: hci5 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 hci_le_create_big_complete_evt+0x383/0xae0
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0xa55/0x1540 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4022
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 5224:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4189
 kmalloc_noprof include/linux/slab.h:681 [inline]
 kzalloc_noprof include/linux/slab.h:807 [inline]
 __hci_conn_add+0x2f9/0x1850 net/bluetooth/hci_conn.c:934
 hci_le_big_sync_established_evt+0x414/0xc20 net/bluetooth/hci_event.c:6923
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0xa55/0x1540 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4022
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 21876:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2252 [inline]
 slab_free mm/slub.c:4473 [inline]
 kfree+0x149/0x360 mm/slub.c:4594
 device_release+0x99/0x1c0
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x22f/0x480 lib/kobject.c:737
 hci_conn_cleanup net/bluetooth/hci_conn.c:175 [inline]
 hci_conn_del+0x8c4/0xc40 net/bluetooth/hci_conn.c:1162
 hci_le_create_big_complete_evt+0x619/0xae0 net/bluetooth/hci_event.c:6880
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0xa55/0x1540 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4022
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff888074c5c000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 0 bytes inside of
 freed 8192-byte region [ffff888074c5c000, ffff888074c5e000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74c58
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff888015442280 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000020002 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff888015442280 0000000000000000 dead000000000001
head: 0000000000000000 0000000000020002 00000001fdffffff 0000000000000000
head: 00fff00000000003 ffffea0001d31601 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 22804, tgid 22801 (syz.4.4472), ts 1806959977736, free_ts 1806863969408
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2321
 allocate_slab+0x5a/0x2f0 mm/slub.c:2484
 new_slab mm/slub.c:2537 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
 __slab_alloc+0x58/0xa0 mm/slub.c:3813
 __slab_alloc_node mm/slub.c:3866 [inline]
 slab_alloc_node mm/slub.c:4025 [inline]
 __do_kmalloc_node mm/slub.c:4157 [inline]
 __kmalloc_node_noprof+0x286/0x440 mm/slub.c:4164
 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650
 snd_pcm_plugin_alloc+0x1be/0x800 sound/core/oss/pcm_plugin.c:74
 snd_pcm_plug_alloc+0x162/0x2b0 sound/core/oss/pcm_plugin.c:133
 snd_pcm_oss_change_params_locked+0x289a/0x3d60 sound/core/oss/pcm_oss.c:1041
 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1105 [inline]
 snd_pcm_oss_get_active_substream+0x201/0x280 sound/core/oss/pcm_oss.c:1122
 snd_pcm_oss_get_formats+0xa2/0x530 sound/core/oss/pcm_oss.c:1843
 snd_pcm_oss_set_format+0x8c/0x5d0 sound/core/oss/pcm_oss.c:1883
 snd_pcm_oss_ioctl+0xdd5/0xff0 sound/core/oss/pcm_oss.c:2648
page last free pid 22818 tgid 22818 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_page+0xd19/0xea0 mm/page_alloc.c:2612
 discard_slab mm/slub.c:2583 [inline]
 __put_partials+0xeb/0x130 mm/slub.c:3051
 put_cpu_partial+0x17c/0x250 mm/slub.c:3126
 __slab_free+0x2ea/0x3d0 mm/slub.c:4343
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3988 [inline]
 slab_alloc_node mm/slub.c:4037 [inline]
 __kmalloc_cache_noprof+0x132/0x2c0 mm/slub.c:4184
 kmalloc_noprof include/linux/slab.h:681 [inline]
 load_elf_binary+0x1f8d/0x2680 fs/binfmt_elf.c:905
 search_binary_handler fs/exec.c:1827 [inline]
 exec_binprm fs/exec.c:1869 [inline]
 bprm_execve+0xaf8/0x1770 fs/exec.c:1920
 kernel_execve+0x931/0xa50 fs/exec.c:2087
 call_usermodehelper_exec_async+0x237/0x380 kernel/umh.c:110
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff888074c5bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888074c5bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888074c5c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888074c5c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888074c5c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================