======================================================
WARNING: possible circular locking dependency detected
5.10.232 #1 Not tainted
------------------------------------------------------
syz-executor.3/4609 is trying to acquire lock:
ffff888017490ae8 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}, at: __flush_work+0xdd/0xa90 kernel/workqueue.c:3050
but task is already holding lock:
ffff888017490f40 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0xef/0x1240 net/bluetooth/hci_core.c:1734
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&hdev->req_lock){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:968 [inline]
__mutex_lock+0x13d/0x10b0 kernel/locking/mutex.c:1109
hci_dev_do_close+0xef/0x1240 net/bluetooth/hci_core.c:1734
hci_rfkill_set_block+0x166/0x1a0 net/bluetooth/hci_core.c:2223
rfkill_set_block+0x1fd/0x540 net/rfkill/core.c:341
rfkill_fop_write+0x253/0x4b0 net/rfkill/core.c:1240
vfs_write+0x29a/0xb10 fs/read_write.c:603
ksys_write+0x1f6/0x260 fs/read_write.c:658
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x67/0xd1
-> #2 (rfkill_global_mutex){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:968 [inline]
__mutex_lock+0x13d/0x10b0 kernel/locking/mutex.c:1109
rfkill_register+0x36/0xa10 net/rfkill/core.c:1016
hci_register_dev+0x42e/0xc00 net/bluetooth/hci_core.c:3774
__vhci_create_device+0x2c8/0x5c0 drivers/bluetooth/hci_vhci.c:129
vhci_create_device drivers/bluetooth/hci_vhci.c:153 [inline]
vhci_open_timeout+0x38/0x50 drivers/bluetooth/hci_vhci.c:310
process_one_work+0x9a9/0x14b0 kernel/workqueue.c:2282
worker_thread+0x61d/0x1310 kernel/workqueue.c:2428
kthread+0x38f/0x470 kernel/kthread.c:328
ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:298
-> #1 (&data->open_mutex){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:968 [inline]
__mutex_lock+0x13d/0x10b0 kernel/locking/mutex.c:1109
vhci_send_frame+0x63/0xa0 drivers/bluetooth/hci_vhci.c:71
hci_send_frame+0x1b9/0x320 net/bluetooth/hci_core.c:4065
hci_sched_acl_pkt net/bluetooth/hci_core.c:4590 [inline]
hci_sched_acl net/bluetooth/hci_core.c:4675 [inline]
hci_tx_work+0xfb4/0x15d0 net/bluetooth/hci_core.c:4741
process_one_work+0x9a9/0x14b0 kernel/workqueue.c:2282
worker_thread+0x61d/0x1310 kernel/workqueue.c:2428
kthread+0x38f/0x470 kernel/kthread.c:328
ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:298
-> #0 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:2988 [inline]
check_prevs_add kernel/locking/lockdep.c:3113 [inline]
validate_chain kernel/locking/lockdep.c:3729 [inline]
__lock_acquire+0x29e7/0x5b00 kernel/locking/lockdep.c:4955
lock_acquire kernel/locking/lockdep.c:5566 [inline]
lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5531
__flush_work+0x105/0xa90 kernel/workqueue.c:3053
hci_dev_do_close+0x131/0x1240 net/bluetooth/hci_core.c:1745
hci_rfkill_set_block+0x166/0x1a0 net/bluetooth/hci_core.c:2223
rfkill_set_block+0x1fd/0x540 net/rfkill/core.c:341
rfkill_fop_write+0x253/0x4b0 net/rfkill/core.c:1240
vfs_write+0x29a/0xb10 fs/read_write.c:603
ksys_write+0x1f6/0x260 fs/read_write.c:658
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x67/0xd1
other info that might help us debug this:
Chain exists of:
(work_completion)(&hdev->tx_work) --> rfkill_global_mutex --> &hdev->req_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&hdev->req_lock);
lock(rfkill_global_mutex);
lock(&hdev->req_lock);
lock((work_completion)(&hdev->tx_work));
*** DEADLOCK ***
2 locks held by syz-executor.3/4609:
#0: ffffffff8561e1c8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xff/0x4b0 net/rfkill/core.c:1232
#1: ffff888017490f40 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0xef/0x1240 net/bluetooth/hci_core.c:1734
stack backtrace:
CPU: 0 PID: 4609 Comm: syz-executor.3 Not tainted 5.10.232 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x107/0x167 lib/dump_stack.c:118
check_noncircular+0x263/0x2e0 kernel/locking/lockdep.c:2123
check_prev_add kernel/locking/lockdep.c:2988 [inline]
check_prevs_add kernel/locking/lockdep.c:3113 [inline]
validate_chain kernel/locking/lockdep.c:3729 [inline]
__lock_acquire+0x29e7/0x5b00 kernel/locking/lockdep.c:4955
lock_acquire kernel/locking/lockdep.c:5566 [inline]
lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5531
__flush_work+0x105/0xa90 kernel/workqueue.c:3053
hci_dev_do_close+0x131/0x1240 net/bluetooth/hci_core.c:1745
hci_rfkill_set_block+0x166/0x1a0 net/bluetooth/hci_core.c:2223
rfkill_set_block+0x1fd/0x540 net/rfkill/core.c:341
rfkill_fop_write+0x253/0x4b0 net/rfkill/core.c:1240
vfs_write+0x29a/0xb10 fs/read_write.c:603
ksys_write+0x1f6/0x260 fs/read_write.c:658
ieee80211 �����۠�u�Q�C !: Selected rate control algorithm 'minstrel_ht'
sysfs: cannot create duplicate filename '/class/ieee80211/�����۠�u�Q�C !'
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x67/0xd1
RIP: 0033:0x7f90ad06db19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f90aa5e3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f90ad180f60 RCX: 00007f90ad06db19
RDX: 0000000000000008 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00007f90ad0c7f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe937c5d9f R14: 00007f90aa5e3300 R15: 0000000000022000
CPU: 1 PID: 4615 Comm: syz-executor.2 Not tainted 5.10.232 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x107/0x167 lib/dump_stack.c:118
sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30
sysfs_do_create_link_sd+0x122/0x140 fs/sysfs/symlink.c:51
sysfs_do_create_link fs/sysfs/symlink.c:80 [inline]
sysfs_create_link+0x5f/0xc0 fs/sysfs/symlink.c:92
device_add_class_symlinks drivers/base/core.c:2751 [inline]
device_add+0x703/0x1c50 drivers/base/core.c:2959
wiphy_register+0x1da6/0x2850 net/wireless/core.c:915
ieee80211_register_hw+0x23c5/0x38b0 net/mac80211/main.c:1295
mac80211_hwsim_new_radio+0x1ce0/0x4250 drivers/net/wireless/mac80211_hwsim.c:3300
hwsim_new_radio_nl+0x991/0x1080 drivers/net/wireless/mac80211_hwsim.c:3881
genl_family_rcv_msg_doit+0x22d/0x330 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x33c/0x5a0 net/netlink/genetlink.c:800
netlink_rcv_skb+0x14b/0x430 net/netlink/af_netlink.c:2485
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline]
netlink_unicast+0x549/0x7f0 net/netlink/af_netlink.c:1333
netlink_sendmsg+0x90f/0xdf0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:651 [inline]
__sock_sendmsg+0x154/0x190 net/socket.c:663
____sys_sendmsg+0x70d/0x870 net/socket.c:2378
___sys_sendmsg+0xf3/0x170 net/socket.c:2432
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2461
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x67/0xd1
RIP: 0033:0x7f1cee07fb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1ceb5f5188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1cee192f60 RCX: 00007f1cee07fb19
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000007
RBP: 00007f1cee0d9f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff08707bcf R14: 00007f1ceb5f5300 R15: 0000000000022000
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'.