======================================================
WARNING: possible circular locking dependency detected
5.15.171-syzkaller #0 Not tainted
------------------------------------------------------
kworker/u5:6/4904 is trying to acquire lock:
ffff88802bbc4120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1678 [inline]
ffff88802bbc4120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_conn_ready net/bluetooth/sco.c:1110 [inline]
ffff88802bbc4120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_connect_cfm+0x146/0xad0 net/bluetooth/sco.c:1201

but task is already holding lock:
ffffffff8db7b5e8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1502 [inline]
ffffffff8db7b5e8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0x45f/0x9b0 net/bluetooth/hci_event.c:4551

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (hci_cb_list_lock){+.+.}-{3:3}:
       lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
       __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
       __mutex_lock kernel/locking/mutex.c:729 [inline]
       mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
       hci_connect_cfm include/net/bluetooth/hci_core.h:1502 [inline]
       hci_remote_features_evt+0x52f/0xb50 net/bluetooth/hci_event.c:3352
       hci_event_packet+0x6fe/0x1550 net/bluetooth/hci_event.c:6421
       hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5155
       process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
       worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
       kthread+0x3f6/0x4f0 kernel/kthread.c:334
       ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

-> #1 (&hdev->lock){+.+.}-{3:3}:
       lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
       __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
       __mutex_lock kernel/locking/mutex.c:729 [inline]
       mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
       sco_sock_connect+0x181/0x8e0 net/bluetooth/sco.c:591
       __sys_connect_file net/socket.c:1923 [inline]
       __sys_connect+0x38b/0x410 net/socket.c:1940
       __do_sys_connect net/socket.c:1950 [inline]
       __se_sys_connect net/socket.c:1947 [inline]
       __x64_sys_connect+0x76/0x80 net/socket.c:1947
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> #0 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3053 [inline]
       check_prevs_add kernel/locking/lockdep.c:3172 [inline]
       validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
       __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
       lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
       lock_sock_nested+0x44/0x100 net/core/sock.c:3250
       lock_sock include/net/sock.h:1678 [inline]
       sco_conn_ready net/bluetooth/sco.c:1110 [inline]
       sco_connect_cfm+0x146/0xad0 net/bluetooth/sco.c:1201
       hci_connect_cfm include/net/bluetooth/hci_core.h:1505 [inline]
       hci_sync_conn_complete_evt+0x4ce/0x9b0 net/bluetooth/hci_event.c:4551
       hci_event_packet+0xa12/0x1550 net/bluetooth/hci_event.c:6483
       hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5155
       process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
       worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
       kthread+0x3f6/0x4f0 kernel/kthread.c:334
       ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

other info that might help us debug this:

Chain exists of:
  sk_lock-AF_BLUETOOTH-BTPROTO_SCO --> &hdev->lock --> hci_cb_list_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(hci_cb_list_lock);
                               lock(&hdev->lock);
                               lock(hci_cb_list_lock);
  lock(sk_lock-AF_BLUETOOTH-BTPROTO_SCO);

 *** DEADLOCK ***

4 locks held by kworker/u5:6/4904:
 #0: ffff888074bc9138 ((wq_completion)hci4#2){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
 #1: ffffc90003647d20 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
 #2: ffff888074618078 (&hdev->lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0xab/0x9b0 net/bluetooth/hci_event.c:4471
 #3: ffffffff8db7b5e8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1502 [inline]
 #3: ffffffff8db7b5e8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0x45f/0x9b0 net/bluetooth/hci_event.c:4551

stack backtrace:
CPU: 1 PID: 4904 Comm: kworker/u5:6 Not tainted 5.15.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci4 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133
 check_prev_add kernel/locking/lockdep.c:3053 [inline]
 check_prevs_add kernel/locking/lockdep.c:3172 [inline]
 validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
 lock_sock_nested+0x44/0x100 net/core/sock.c:3250
 lock_sock include/net/sock.h:1678 [inline]
 sco_conn_ready net/bluetooth/sco.c:1110 [inline]
 sco_connect_cfm+0x146/0xad0 net/bluetooth/sco.c:1201
 hci_connect_cfm include/net/bluetooth/hci_core.h:1505 [inline]
 hci_sync_conn_complete_evt+0x4ce/0x9b0 net/bluetooth/hci_event.c:4551
 hci_event_packet+0xa12/0x1550 net/bluetooth/hci_event.c:6483
 hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5155
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
==================================================================
BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock+0x290/0x370 kernel/locking/spinlock_debug.c:114
Read of size 4 at addr ffff88802bbc408c by task kworker/u5:6/4904

CPU: 1 PID: 4904 Comm: kworker/u5:6 Not tainted 5.15.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci4 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
 do_raw_spin_lock+0x290/0x370 kernel/locking/spinlock_debug.c:114
 spin_lock_bh include/linux/spinlock.h:368 [inline]
 lock_sock_nested+0x68/0x100 net/core/sock.c:3253
 lock_sock include/net/sock.h:1678 [inline]
 sco_conn_ready net/bluetooth/sco.c:1110 [inline]
 sco_connect_cfm+0x146/0xad0 net/bluetooth/sco.c:1201
 hci_connect_cfm include/net/bluetooth/hci_core.h:1505 [inline]
 hci_sync_conn_complete_evt+0x4ce/0x9b0 net/bluetooth/hci_event.c:4551
 hci_event_packet+0xa12/0x1550 net/bluetooth/hci_event.c:6483
 hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5155
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Allocated by task 5242:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc+0x168/0x300 mm/slub.c:4407
 kmalloc include/linux/slab.h:596 [inline]
 sk_prot_alloc+0xe0/0x200 net/core/sock.c:1863
 sk_alloc+0x35/0x310 net/core/sock.c:1916
 sco_sock_alloc net/bluetooth/sco.c:485 [inline]
 sco_sock_create+0xb7/0x300 net/bluetooth/sco.c:520
 bt_sock_create+0x159/0x220 net/bluetooth/af_bluetooth.c:130
 __sock_create+0x460/0x8f0 net/socket.c:1486
 sock_create net/socket.c:1542 [inline]
 __sys_socket+0x132/0x370 net/socket.c:1584
 __do_sys_socket net/socket.c:1593 [inline]
 __se_sys_socket net/socket.c:1591 [inline]
 __x64_sys_socket+0x76/0x80 net/socket.c:1591
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 5242:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kfree+0xf1/0x270 mm/slub.c:4559
 sk_prot_free net/core/sock.c:1899 [inline]
 __sk_destruct+0x58e/0x840 net/core/sock.c:1985
 sco_sock_release+0x259/0x310 net/bluetooth/sco.c:1098
 __sock_release net/socket.c:649 [inline]
 sock_close+0xcd/0x230 net/socket.c:1336
 __fput+0x3fe/0x8e0 fs/file_table.c:280
 task_work_run+0x129/0x1a0 kernel/task_work.c:188
 get_signal+0x143a/0x14e0 kernel/signal.c:2672
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88802bbc4000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 140 bytes inside of
 2048-byte region [ffff88802bbc4000, ffff88802bbc4800)
The buggy address belongs to the page:
page:ffffea0000aef000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2bbc0
head:ffffea0000aef000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888017042000
raw: 0000000000000000 0000000000080008 00000001ffffffff 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 4891, ts 102806798154, free_ts 102768431800
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192
 __alloc_pages+0x272/0x700 mm/page_alloc.c:5464
 alloc_slab_page mm/slub.c:1775 [inline]
 allocate_slab mm/slub.c:1912 [inline]
 new_slab+0xbb/0x4b0 mm/slub.c:1975
 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 __kmalloc+0x1c9/0x300 mm/slub.c:4403
 kmalloc include/linux/slab.h:596 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 __register_sysctl_table+0xdc/0x1220 fs/proc/proc_sysctl.c:1317
 __devinet_sysctl_register+0x1d3/0x2a0 net/ipv4/devinet.c:2603
 devinet_sysctl_register+0x13a/0x1a0 net/ipv4/devinet.c:2643
 inetdev_init+0x282/0x4a0 net/ipv4/devinet.c:277
 inetdev_event+0x29b/0x1490 net/ipv4/devinet.c:1543
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2044
 register_netdevice+0x12e8/0x1720 net/core/dev.c:10396
 veth_newlink+0x72e/0xe20 drivers/net/veth.c:1683
 __rtnl_newlink net/core/rtnetlink.c:3521 [inline]
 rtnl_newlink+0x14e1/0x2070 net/core/rtnetlink.c:3569
 rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5647
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
 do_slab_free mm/slub.c:3487 [inline]
 ___cache_free+0xe3/0x100 mm/slub.c:3506
 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 __kmalloc_track_caller+0x11e/0x300 mm/slub.c:4925
 kvasprintf+0xd6/0x180 lib/kasprintf.c:25
 kobject_set_name_vargs+0x5d/0x110 lib/kobject.c:297
 kobject_add_varg lib/kobject.c:392 [inline]
 kobject_init_and_add+0xda/0x190 lib/kobject.c:481
 netdev_queue_add_kobject net/core/net-sysfs.c:1666 [inline]
 netdev_queue_update_kobjects+0x186/0x3f0 net/core/net-sysfs.c:1711
 register_queue_kobjects net/core/net-sysfs.c:1772 [inline]
 netdev_register_kobject+0x263/0x310 net/core/net-sysfs.c:2018
 register_netdevice+0x108c/0x1720 net/core/dev.c:10365
 macvlan_common_newlink+0xfff/0x1740 drivers/net/macvlan.c:1500
 __rtnl_newlink net/core/rtnetlink.c:3521 [inline]
 rtnl_newlink+0x14e1/0x2070 net/core/rtnetlink.c:3569

Memory state around the buggy address:
 ffff88802bbc3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802bbc4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802bbc4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88802bbc4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802bbc4180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================