BUG: sleeping function called from invalid context at kernel/locking/mutex.c:585
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 67, name: kworker/u33:0
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
4 locks held by kworker/u33:0/67:
 #0: ffff88802eda7148 ((wq_completion)hci18#2){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
 #1: ffffc90000d47d80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
 #2: ffff88803ca88078 (&hdev->lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0xde/0xb30 net/bluetooth/hci_event.c:6853
 #3: ffffffff8ddb5ce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #3: ffffffff8ddb5ce0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8ddb5ce0 (rcu_read_lock){....}-{1:2}, at: hci_le_create_big_complete_evt+0x100/0xb30 net/bluetooth/hci_event.c:6854
CPU: 0 UID: 0 PID: 67 Comm: kworker/u33:0 Not tainted 6.11.0-rc3-syzkaller-00010-g6b4aa469f049 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci18 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:8463
 __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:6878
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7135
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4022
 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-rc3-syzkaller-00010-g6b4aa469f049 #0 Tainted: G        W         
-----------------------------
kworker/u33:0/67 is trying to lock:
ffffffff8fc865a8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline]
ffffffff8fc865a8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0x387/0xb30 net/bluetooth/hci_event.c:6878
other info that might help us debug this:
context-{4:4}
4 locks held by kworker/u33:0/67:
 #0: ffff88802eda7148 ((wq_completion)hci18#2){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
 #1: ffffc90000d47d80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
 #2: ffff88803ca88078 (&hdev->lock){+.+.}-{3:3}, at: hci_le_create_big_complete_evt+0xde/0xb30 net/bluetooth/hci_event.c:6853
 #3: ffffffff8ddb5ce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #3: ffffffff8ddb5ce0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8ddb5ce0 (rcu_read_lock){....}-{1:2}, at: hci_le_create_big_complete_evt+0x100/0xb30 net/bluetooth/hci_event.c:6854
stack backtrace:
CPU: 0 UID: 0 PID: 67 Comm: kworker/u33:0 Tainted: G        W          6.11.0-rc3-syzkaller-00010-g6b4aa469f049 #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: hci18 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:6878
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7135
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4022
 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:6857
Read of size 8 at addr ffff888038570000 by task kworker/u33:0/67

CPU: 0 UID: 0 PID: 67 Comm: kworker/u33:0 Tainted: G        W          6.11.0-rc3-syzkaller-00010-g6b4aa469f049 #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: hci18 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:6857
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7135
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4022
 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 5351:
 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:6923
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7135
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4022
 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 67:
 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:2582
 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+0x1f/0x30 drivers/base/core.c:3790
 hci_conn_del_sysfs+0x151/0x180 net/bluetooth/hci_sysfs.c:72
 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:6880
 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7135
 hci_event_func net/bluetooth/hci_event.c:7443 [inline]
 hci_event_packet+0x666/0x1180 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4022
 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 ffff888038570000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 0 bytes inside of
 freed 8192-byte region [ffff888038570000, ffff888038572000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x38570
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
ksm flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff888015843180 ffffea00018fec00 0000000000000003
raw: 0000000000000000 0000000000020002 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff888015843180 ffffea00018fec00 0000000000000003
head: 0000000000000000 0000000000020002 00000001fdffffff 0000000000000000
head: 00fff00000000003 ffffea0000e15c01 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 13463, tgid 13462 (syz.2.2182), ts 579594662264, free_ts 579535738859
 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
 netlink_alloc_large_skb+0x96/0x130 net/netlink/af_netlink.c:1208
 netlink_sendmsg+0x689/0xd70 net/netlink/af_netlink.c:1876
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 sock_sendmsg+0x3cb/0x470 net/socket.c:768
 splice_to_socket+0xab2/0x1040 fs/splice.c:889
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x19b/0x6d0 fs/splice.c:1164
 splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x17e/0x250 fs/splice.c:1233
page last free pid 13463 tgid 13462 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]
 __do_kmalloc_node mm/slub.c:4157 [inline]
 __kmalloc_noprof+0x199/0x400 mm/slub.c:4170
 kmalloc_noprof include/linux/slab.h:685 [inline]
 kzalloc_noprof include/linux/slab.h:807 [inline]
 copy_splice_read+0x1a8/0xb80 fs/splice.c:339
 do_splice_read fs/splice.c:984 [inline]
 do_splice_read+0x2cf/0x380 fs/splice.c:959
 splice_direct_to_actor+0x2a4/0xa40 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x17e/0x250 fs/splice.c:1233
 do_sendfile+0xb1e/0xe50 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64 fs/read_write.c:1348 [inline]
 __x64_sys_sendfile64+0x1da/0x220 fs/read_write.c:1348
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88803856ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803856ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888038570000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888038570080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888038570100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================