BUG: sleeping function called from invalid context at kernel/locking/mutex.c:585
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5340, name: kworker/u33:5
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
4 locks held by kworker/u33:5/5340:
 #0: ffff88805163a148 ((wq_completion)hci1#2){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
 #1: ffffc90003697d80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
 #2: ffff888042780078 (&hdev->lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0xde/0xb30 net/bluetooth/hci_event.c:6852
 #3: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #3: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: hci_le_create_big_complete_evt+0x100/0xb30 net/bluetooth/hci_event.c:6853
CPU: 3 UID: 0 PID: 5340 Comm: kworker/u33:5 Not tainted 6.11.0-rc1-syzkaller-00042-g6b5faec9f564 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci1 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:119
 __might_resched+0x3c0/0x5e0 kernel/sched/core.c:8437
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0xe2/0x9c0 kernel/locking/mutex.c:752
 hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline]
 hci_le_create_big_complete_evt+0x387/0xb30 net/bluetooth/hci_event.c:6877
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7134
 hci_event_func net/bluetooth/hci_event.c:7442 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7497
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4029
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 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-rc1-syzkaller-00042-g6b5faec9f564 #0 Tainted: G        W         
-----------------------------
kworker/u33:5/5340 is trying to lock:
ffffffff8fc83128 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline]
ffffffff8fc83128 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0x387/0xb30 net/bluetooth/hci_event.c:6877
other info that might help us debug this:
context-{4:4}
4 locks held by kworker/u33:5/5340:
 #0: ffff88805163a148 ((wq_completion)hci1#2){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
 #1: ffffc90003697d80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
 #2: ffff888042780078 (&hdev->lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0xde/0xb30 net/bluetooth/hci_event.c:6852
 #3: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #3: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: hci_le_create_big_complete_evt+0x100/0xb30 net/bluetooth/hci_event.c:6853
stack backtrace:
CPU: 3 UID: 0 PID: 5340 Comm: kworker/u33:5 Tainted: G        W          6.11.0-rc1-syzkaller-00042-g6b5faec9f564 #0
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci1 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 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+0x13cc/0x3cb0 kernel/locking/lockdep.c:5092
 lock_acquire kernel/locking/lockdep.c:5759 [inline]
 lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
 __mutex_lock_common kernel/locking/mutex.c:608 [inline]
 __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752
 hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline]
 hci_le_create_big_complete_evt+0x387/0xb30 net/bluetooth/hci_event.c:6877
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7134
 hci_event_func net/bluetooth/hci_event.c:7442 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7497
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4029
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 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+0xa62/0xb30 net/bluetooth/hci_event.c:6856
Read of size 8 at addr ffff88804672c000 by task kworker/u33:5/5340

CPU: 3 UID: 0 PID: 5340 Comm: kworker/u33:5 Tainted: G        W          6.11.0-rc1-syzkaller-00042-g6b5faec9f564 #0
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci1 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 hci_le_create_big_complete_evt+0xa62/0xb30 net/bluetooth/hci_event.c:6856
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7134
 hci_event_func net/bluetooth/hci_event.c:7442 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7497
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4029
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 15962:
 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:370 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
 kmalloc_noprof include/linux/slab.h:681 [inline]
 kzalloc_noprof include/linux/slab.h:807 [inline]
 __hci_conn_add+0x131/0x1a50 net/bluetooth/hci_conn.c:934
 hci_conn_add+0x56/0x70 net/bluetooth/hci_conn.c:1052
 hci_le_big_sync_established_evt+0x73f/0xad0 net/bluetooth/hci_event.c:6922
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7134
 hci_event_func net/bluetooth/hci_event.c:7442 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7497
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4029
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 5340:
 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:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 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+0x12a/0x3b0 mm/slub.c:4594
 device_release+0xa1/0x240 drivers/base/core.c:2581
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1fa/0x5b0 lib/kobject.c:737
 put_device drivers/base/core.c:3787 [inline]
 device_unregister+0x2f/0xc0 drivers/base/core.c:3910
 hci_conn_del_sysfs+0xb4/0x180 net/bluetooth/hci_sysfs.c:86
 hci_conn_cleanup net/bluetooth/hci_conn.c:175 [inline]
 hci_conn_del+0x54e/0xdb0 net/bluetooth/hci_conn.c:1162
 hci_le_create_big_complete_evt+0x4ba/0xb30 net/bluetooth/hci_event.c:6879
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7134
 hci_event_func net/bluetooth/hci_event.c:7442 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7497
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4029
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 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 ffff88804672c000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 0 bytes inside of
 freed 8192-byte region [ffff88804672c000, ffff88804672e000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x46728
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: 0xfdffffff(slab)
raw: 00fff00000000040 ffff888015843180 ffffea00008b6a00 dead000000000002
raw: 0000000000000000 0000000000020002 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff888015843180 ffffea00008b6a00 dead000000000002
head: 0000000000000000 0000000000020002 00000001fdffffff 0000000000000000
head: 00fff00000000003 ffffea000119ca01 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 5419, tgid 5415 (syz.0.7), ts 62919219914, free_ts 62832253801
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3442
 __alloc_pages_noprof+0x22b/0x2460 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+0x4e/0xf0 mm/slub.c:2321
 allocate_slab mm/slub.c:2484 [inline]
 new_slab+0x84/0x260 mm/slub.c:2537
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3723
 __slab_alloc.constprop.0+0x56/0xb0 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+0x357/0x430 mm/slub.c:4164
 __kvmalloc_node_noprof+0x6f/0x1a0 mm/util.c:650
 kvmalloc_array_node_noprof include/linux/slab.h:833 [inline]
 __ptr_ring_init_queue_alloc_noprof include/linux/ptr_ring.h:471 [inline]
 ptr_ring_init_noprof include/linux/ptr_ring.h:489 [inline]
 skb_array_init_noprof include/linux/skb_array.h:182 [inline]
 pfifo_fast_init+0x125/0x3b0 net/sched/sch_generic.c:865
 qdisc_create_dflt+0x101/0x440 net/sched/sch_generic.c:1015
 attach_one_default_qdisc net/sched/sch_generic.c:1174 [inline]
 netdev_for_each_tx_queue include/linux/netdevice.h:2513 [inline]
 attach_default_qdiscs net/sched/sch_generic.c:1192 [inline]
 dev_activate+0x63c/0x12c0 net/sched/sch_generic.c:1251
 __dev_open+0x396/0x4e0 net/core/dev.c:1483
 __dev_change_flags+0x561/0x720 net/core/dev.c:8837
 dev_change_flags+0x8f/0x160 net/core/dev.c:8909
 devinet_ioctl+0x127a/0x1f10 net/ipv4/devinet.c:1177
page last free pid 5364 tgid 5364 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2612
 __put_partials+0x14c/0x170 mm/slub.c:3051
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 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]
 kmem_cache_alloc_node_noprof+0x153/0x310 mm/slub.c:4080
 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:664
 alloc_skb include/linux/skbuff.h:1320 [inline]
 alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6526
 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2815
 sock_alloc_send_skb include/net/sock.h:1778 [inline]
 mld_newpack.isra.0+0x1ed/0x790 net/ipv6/mcast.c:1746
 add_grhead+0x299/0x340 net/ipv6/mcast.c:1849
 add_grec+0x111e/0x1670 net/ipv6/mcast.c:1987
 mld_send_initial_cr.part.0+0xe2/0x260 net/ipv6/mcast.c:2233
 mld_send_initial_cr net/ipv6/mcast.c:2224 [inline]
 mld_dad_work+0x51/0x2f0 net/ipv6/mcast.c:2259
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390

Memory state around the buggy address:
 ffff88804672bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88804672bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88804672c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88804672c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804672c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================