BUG: sleeping function called from invalid context at net/core/sock.c:3545
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5358, name: kworker/u33:4
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
6 locks held by kworker/u33:4/5358:
 #0: ffff88801bffe948 ((wq_completion)hci2#2){+.+.}-{0:0}, at: process_one_work+0x11f0/0x1ad0 kernel/workqueue.c:3206
 #1: ffffc900037dfd80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1ad0 kernel/workqueue.c:3207
 #2: ffff88805cd08078 (&hdev->lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0x118/0xa10 net/bluetooth/hci_event.c:4926
 #3: ffffffff8fc7b8c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline]
 #3: ffffffff8fc7b8c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0x336/0xa10 net/bluetooth/hci_event.c:5009
 #4: ffff88801eab8c20 (&conn->lock#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #4: ffff88801eab8c20 (&conn->lock#2){+.+.}-{2:2}, at: sco_conn_ready net/bluetooth/sco.c:1277 [inline]
 #4: ffff88801eab8c20 (&conn->lock#2){+.+.}-{2:2}, at: sco_connect_cfm+0x2d1/0xbd0 net/bluetooth/sco.c:1362
 #5: ffff88805fc53258 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
 #5: ffff88805fc53258 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_conn_ready net/bluetooth/sco.c:1290 [inline]
 #5: ffff88805fc53258 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_connect_cfm+0x466/0xbd0 net/bluetooth/sco.c:1362
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 2 UID: 0 PID: 5358 Comm: kworker/u33:4 Not tainted 6.11.0-rc6-syzkaller-00075-gad618736883b #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci2 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
 lock_sock_nested+0x4b/0xf0 net/core/sock.c:3545
 lock_sock include/net/sock.h:1607 [inline]
 sco_conn_ready net/bluetooth/sco.c:1290 [inline]
 sco_connect_cfm+0x466/0xbd0 net/bluetooth/sco.c:1362
 hci_connect_cfm include/net/bluetooth/hci_core.h:1965 [inline]
 hci_sync_conn_complete_evt+0x3a1/0xa10 net/bluetooth/hci_event.c:5009
 hci_event_func net/bluetooth/hci_event.c:7446 [inline]
 hci_event_packet+0x9eb/0x1190 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4023
 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 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 __lock_acquire+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
Read of size 8 at addr ffff88805fc531d8 by task kworker/u33:4/5358

CPU: 2 UID: 0 PID: 5358 Comm: kworker/u33:4 Tainted: G        W          6.11.0-rc6-syzkaller-00075-gad618736883b #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: hci2 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
 __lock_acquire+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
 lock_acquire kernel/locking/lockdep.c:5759 [inline]
 lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
 _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x5f/0xf0 net/core/sock.c:3546
 lock_sock include/net/sock.h:1607 [inline]
 sco_conn_ready net/bluetooth/sco.c:1290 [inline]
 sco_connect_cfm+0x466/0xbd0 net/bluetooth/sco.c:1362
 hci_connect_cfm include/net/bluetooth/hci_core.h:1965 [inline]
 hci_sync_conn_complete_evt+0x3a1/0xa10 net/bluetooth/hci_event.c:5009
 hci_event_func net/bluetooth/hci_event.c:7446 [inline]
 hci_event_packet+0x9eb/0x1190 net/bluetooth/hci_event.c:7498
 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4023
 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 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 5426:
 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
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:4162 [inline]
 __kmalloc_noprof+0x1e8/0x410 mm/slub.c:4174
 kmalloc_noprof include/linux/slab.h:685 [inline]
 sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2096
 sk_alloc+0x36/0xb90 net/core/sock.c:2149
 bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:148
 sco_sock_alloc net/bluetooth/sco.c:500 [inline]
 sco_sock_create+0xe3/0x3c0 net/bluetooth/sco.c:531
 bt_sock_create+0x182/0x350 net/bluetooth/af_bluetooth.c:132
 __sock_create+0x32e/0x800 net/socket.c:1571
 sock_create net/socket.c:1622 [inline]
 __sys_socket_create net/socket.c:1659 [inline]
 __sys_socket+0x14f/0x260 net/socket.c:1706
 __do_sys_socket net/socket.c:1720 [inline]
 __se_sys_socket net/socket.c:1718 [inline]
 __ia32_sys_socket+0x72/0xb0 net/socket.c:1718
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Freed by task 5424:
 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:2256 [inline]
 slab_free mm/slub.c:4477 [inline]
 kfree+0x12a/0x3b0 mm/slub.c:4598
 sk_prot_free net/core/sock.c:2132 [inline]
 __sk_destruct+0x5eb/0x720 net/core/sock.c:2224
 sk_destruct+0xc2/0xf0 net/core/sock.c:2239
 __sk_free+0xf4/0x3e0 net/core/sock.c:2250
 sk_free+0x6a/0x90 net/core/sock.c:2261
 sock_put include/net/sock.h:1884 [inline]
 sco_sock_kill net/bluetooth/sco.c:431 [inline]
 sco_sock_kill+0x11a/0x1c0 net/bluetooth/sco.c:421
 sco_sock_release+0x154/0x2d0 net/bluetooth/sco.c:1259
 __sock_release+0xb0/0x270 net/socket.c:659
 sock_close+0x1c/0x30 net/socket.c:1421
 __fput+0x408/0xbb0 fs/file_table.c:422
 task_work_run+0x14e/0x250 kernel/task_work.c:228
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

The buggy address belongs to the object at ffff88805fc53000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 472 bytes inside of
 freed 2048-byte region [ffff88805fc53000, ffff88805fc53800)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5fc50
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 04fff00000000040 ffff88801ac42f00 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080080008 00000001fdffffff 0000000000000000
head: 04fff00000000040 ffff88801ac42f00 0000000000000000 dead000000000001
head: 0000000000000000 0000000080080008 00000001fdffffff 0000000000000000
head: 04fff00000000003 ffffea00017f1401 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5348, tgid 5348 (syz-executor), ts 62696416869, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500
 prep_new_page mm/page_alloc.c:1508 [inline]
 get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702
 __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:2325
 allocate_slab mm/slub.c:2488 [inline]
 new_slab+0x84/0x260 mm/slub.c:2541
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3727
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817
 __slab_alloc_node mm/slub.c:3870 [inline]
 slab_alloc_node mm/slub.c:4029 [inline]
 __do_kmalloc_node mm/slub.c:4161 [inline]
 __kmalloc_node_track_caller_noprof+0x365/0x440 mm/slub.c:4181
 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:605
 pskb_expand_head+0x236/0x1130 net/core/skbuff.c:2259
 netlink_trim+0x1ef/0x250 net/netlink/af_netlink.c:1313
 netlink_broadcast_filtered+0xc7/0xef0 net/netlink/af_netlink.c:1519
 nlmsg_multicast_filtered include/net/netlink.h:1125 [inline]
 nlmsg_multicast include/net/netlink.h:1144 [inline]
 nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2593
 rtnl_notify net/core/rtnetlink.c:757 [inline]
 rtmsg_ifinfo_send net/core/rtnetlink.c:4100 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4116 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4103 [inline]
 rtmsg_ifinfo+0x174/0x1a0 net/core/rtnetlink.c:4122
 __dev_notify_flags+0x24e/0x2e0 net/core/dev.c:8873
 rtnl_configure_link+0x1b7/0x260 net/core/rtnetlink.c:3331
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88805fc53080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805fc53100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805fc53180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff88805fc53200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805fc53280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================