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with SMTP id e9e14a558f8ab-3ddb6838162mr5534735ab.10.1748887303171; Mon, 02 Jun 2025 11:01:43 -0700 (PDT) Date: Mon, 02 Jun 2025 11:01:43 -0700 In-Reply-To: <6832ca5f.a70a0220.1765ec.015d.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <683de707.050a0220.55ceb.0003.GAE@google.com> Subject: Re: [syzbot] Re: [PATCH v3] Bluetooth: MGMT: Protect mgmt_pending list with its own lock From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: MGMT: Protect mgmt_pending list with its= own lock Author: luiz.dentz@gmail.com #syz test On Mon, Jun 2, 2025 at 2:00=E2=80=AFPM Luiz Augusto von Dentz wrote: > > #syz test > > On Mon, Jun 2, 2025 at 1:46=E2=80=AFPM Luiz Augusto von Dentz > wrote: > > > > From: Luiz Augusto von Dentz > > > > This uses a mutex to protect from concurrent access of mgmt_pending > > list which can cause crashes like: > > > > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > > BUG: KASAN: slab-use-after-free in mgmt_remove_adv_monitor_complete+0xe= 5/0x540 net/bluetooth/mgmt.c:5405 > > Read of size 8 at addr ffff888048891a18 by task kworker/u5:8/5333 > > > > CPU: 0 UID: 0 PID: 5333 Comm: kworker/u5:8 Not tainted 6.15.0-rc5-syzka= ller-00197-gea34704d6ad7 #0 PREEMPT(full) > > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-= 1.16.3-2~bpo12+1 04/01/2014 > > Workqueue: hci0 hci_cmd_sync_work > > Call Trace: > > > > dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 > > print_address_description mm/kasan/report.c:408 [inline] > > print_report+0xb4/0x290 mm/kasan/report.c:521 > > kasan_report+0x118/0x150 mm/kasan/report.c:634 > > mgmt_remove_adv_monitor_complete+0xe5/0x540 net/bluetooth/mgmt.c:5405 > > hci_cmd_sync_work+0x25e/0x3a0 net/bluetooth/hci_sync.c:334 > > process_one_work kernel/workqueue.c:3238 [inline] > > process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 > > worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 > > kthread+0x70e/0x8a0 kernel/kthread.c:464 > > ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 > > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > > > > > > Allocated by task 5702: > > kasan_save_stack mm/kasan/common.c:47 [inline] > > kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 > > poison_kmalloc_redzone mm/kasan/common.c:377 [inline] > > __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 > > kasan_kmalloc include/linux/kasan.h:260 [inline] > > __kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4358 > > kmalloc_noprof include/linux/slab.h:905 [inline] > > kzalloc_noprof include/linux/slab.h:1039 [inline] > > mgmt_pending_new+0x65/0x240 net/bluetooth/mgmt_util.c:252 > > mgmt_pending_add+0x34/0x120 net/bluetooth/mgmt_util.c:279 > > remove_adv_monitor+0x103/0x1b0 net/bluetooth/mgmt.c:5453 > > hci_mgmt_cmd+0x9c6/0xef0 net/bluetooth/hci_sock.c:1712 > > hci_sock_sendmsg+0x6ca/0xee0 net/bluetooth/hci_sock.c:1832 > > sock_sendmsg_nosec net/socket.c:712 [inline] > > __sock_sendmsg+0x219/0x270 net/socket.c:727 > > sock_write_iter+0x258/0x330 net/socket.c:1131 > > new_sync_write fs/read_write.c:591 [inline] > > vfs_write+0x548/0xa90 fs/read_write.c:684 > > ksys_write+0x145/0x250 fs/read_write.c:736 > > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > > do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > > > Freed by task 5700: > > kasan_save_stack mm/kasan/common.c:47 [inline] > > kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 > > kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 > > poison_slab_object mm/kasan/common.c:247 [inline] > > __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 > > kasan_slab_free include/linux/kasan.h:233 [inline] > > slab_free_hook mm/slub.c:2380 [inline] > > slab_free mm/slub.c:4642 [inline] > > kfree+0x193/0x440 mm/slub.c:4841 > > mgmt_pending_foreach+0xc9/0x120 net/bluetooth/mgmt_util.c:242 > > mgmt_index_removed+0x10d/0x2f0 net/bluetooth/mgmt.c:9362 > > hci_sock_bind+0xbe9/0x1000 net/bluetooth/hci_sock.c:1307 > > __sys_bind_socket net/socket.c:1810 [inline] > > __sys_bind+0x2c3/0x3e0 net/socket.c:1841 > > __do_sys_bind net/socket.c:1846 [inline] > > __se_sys_bind net/socket.c:1844 [inline] > > __x64_sys_bind+0x7a/0x90 net/socket.c:1844 > > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > > do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > > > Fixes: a380b6cff1a2 ("Bluetooth: Add generic mgmt helper API") > > Closes: https://syzkaller.appspot.com/bug?extid=3Dfeb0dc579bbe30a13190 > > Closes: https://syzkaller.appspot.com/bug?extid=3D0a7039d5d9986ff4ececi > > Closes: https://syzkaller.appspot.com/bug?extid=3Dcc0cc52e7f43dc9e6df1 > > Reported-by: syzbot+feb0dc579bbe30a13190@syzkaller.appspotmail.com > > Tested-by: syzbot+feb0dc579bbe30a13190@syzkaller.appspotmail.com > > Tested-by: syzbot+0a7039d5d9986ff4ecec@syzkaller.appspotmail.com > > Tested-by: syzbot+cc0cc52e7f43dc9e6df1@syzkaller.appspotmail.com > > Signed-off-by: Dmitry Antipov > > Signed-off-by: Luiz Augusto von Dentz > > --- > > include/net/bluetooth/hci_core.h | 1 + > > net/bluetooth/hci_core.c | 1 + > > net/bluetooth/mgmt.c | 101 +++++++++++++++---------------- > > net/bluetooth/mgmt_util.c | 32 ++++++++-- > > net/bluetooth/mgmt_util.h | 4 +- > > 5 files changed, 80 insertions(+), 59 deletions(-) > > > > diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/h= ci_core.h > > index 2b261e74e2c4..b9ff0e825071 100644 > > --- a/include/net/bluetooth/hci_core.h > > +++ b/include/net/bluetooth/hci_core.h > > @@ -546,6 +546,7 @@ struct hci_dev { > > struct hci_conn_hash conn_hash; > > > > struct list_head mesh_pending; > > + struct mutex mgmt_pending_lock; > > struct list_head mgmt_pending; > > struct list_head reject_list; > > struct list_head accept_list; > > diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c > > index 04845ff3ad57..f197f5497043 100644 > > --- a/net/bluetooth/hci_core.c > > +++ b/net/bluetooth/hci_core.c > > @@ -2487,6 +2487,7 @@ struct hci_dev *hci_alloc_dev_priv(int sizeof_pri= v) > > > > mutex_init(&hdev->lock); > > mutex_init(&hdev->req_lock); > > + mutex_init(&hdev->mgmt_pending_lock); > > > > ida_init(&hdev->unset_handle_ida); > > > > diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c > > index 14a9462fced5..7d9ed7db377f 100644 > > --- a/net/bluetooth/mgmt.c > > +++ b/net/bluetooth/mgmt.c > > @@ -1447,22 +1447,17 @@ static void settings_rsp(struct mgmt_pending_cm= d *cmd, void *data) > > > > send_settings_rsp(cmd->sk, cmd->opcode, match->hdev); > > > > - list_del(&cmd->list); > > - > > if (match->sk =3D=3D NULL) { > > match->sk =3D cmd->sk; > > sock_hold(match->sk); > > } > > - > > - mgmt_pending_free(cmd); > > } > > > > static void cmd_status_rsp(struct mgmt_pending_cmd *cmd, void *data) > > { > > u8 *status =3D data; > > > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, *status); > > - mgmt_pending_remove(cmd); > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, *status); > > } > > > > static void cmd_complete_rsp(struct mgmt_pending_cmd *cmd, void *data) > > @@ -1476,8 +1471,6 @@ static void cmd_complete_rsp(struct mgmt_pending_= cmd *cmd, void *data) > > > > if (cmd->cmd_complete) { > > cmd->cmd_complete(cmd, match->mgmt_status); > > - mgmt_pending_remove(cmd); > > - > > return; > > } > > > > @@ -1486,13 +1479,13 @@ static void cmd_complete_rsp(struct mgmt_pendin= g_cmd *cmd, void *data) > > > > static int generic_cmd_complete(struct mgmt_pending_cmd *cmd, u8 statu= s) > > { > > - return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, stat= us, > > + return mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, s= tatus, > > cmd->param, cmd->param_len); > > } > > > > static int addr_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status) > > { > > - return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, stat= us, > > + return mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, s= tatus, > > cmd->param, sizeof(struct mgmt_addr_in= fo)); > > } > > > > @@ -1532,7 +1525,7 @@ static void mgmt_set_discoverable_complete(struct= hci_dev *hdev, void *data, > > > > if (err) { > > u8 mgmt_err =3D mgmt_status(err); > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_= err); > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, mg= mt_err); > > hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE); > > goto done; > > } > > @@ -1707,7 +1700,7 @@ static void mgmt_set_connectable_complete(struct = hci_dev *hdev, void *data, > > > > if (err) { > > u8 mgmt_err =3D mgmt_status(err); > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_= err); > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, mg= mt_err); > > goto done; > > } > > > > @@ -1943,8 +1936,8 @@ static void set_ssp_complete(struct hci_dev *hdev= , void *data, int err) > > new_settings(hdev, NULL); > > } > > > > - mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, cmd_status_= rsp, > > - &mgmt_err); > > + mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, true, > > + cmd_status_rsp, &mgmt_err); > > return; > > } > > > > @@ -1954,7 +1947,7 @@ static void set_ssp_complete(struct hci_dev *hdev= , void *data, int err) > > changed =3D hci_dev_test_and_clear_flag(hdev, HCI_SSP_E= NABLED); > > } > > > > - mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, settings_rsp, &matc= h); > > + mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, true, settings_rsp,= &match); > > > > if (changed) > > new_settings(hdev, match.sk); > > @@ -2074,12 +2067,12 @@ static void set_le_complete(struct hci_dev *hde= v, void *data, int err) > > bt_dev_dbg(hdev, "err %d", err); > > > > if (status) { > > - mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, cmd_status_r= sp, > > - &status); > > + mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, true, cmd_st= atus_rsp, > > + &status); > > return; > > } > > > > - mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, settings_rsp, &match= ); > > + mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, true, settings_rsp, = &match); > > > > new_settings(hdev, match.sk); > > > > @@ -2138,7 +2131,7 @@ static void set_mesh_complete(struct hci_dev *hde= v, void *data, int err) > > struct sock *sk =3D cmd->sk; > > > > if (status) { > > - mgmt_pending_foreach(MGMT_OP_SET_MESH_RECEIVER, hdev, > > + mgmt_pending_foreach(MGMT_OP_SET_MESH_RECEIVER, hdev, t= rue, > > cmd_status_rsp, &status); > > return; > > } > > @@ -2638,7 +2631,7 @@ static void mgmt_class_complete(struct hci_dev *h= dev, void *data, int err) > > > > bt_dev_dbg(hdev, "err %d", err); > > > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(err), hdev->dev_class, 3); > > > > mgmt_pending_free(cmd); > > @@ -3427,7 +3420,7 @@ static int pairing_complete(struct mgmt_pending_c= md *cmd, u8 status) > > bacpy(&rp.addr.bdaddr, &conn->dst); > > rp.addr.type =3D link_to_bdaddr(conn->type, conn->dst_type); > > > > - err =3D mgmt_cmd_complete(cmd->sk, cmd->index, MGMT_OP_PAIR_DEV= ICE, > > + err =3D mgmt_cmd_complete(cmd->sk, cmd->hdev->id, MGMT_OP_PAIR_= DEVICE, > > status, &rp, sizeof(rp)); > > > > /* So we don't get further callbacks for this connection */ > > @@ -5196,7 +5189,7 @@ static void mgmt_add_adv_patterns_monitor_complet= e(struct hci_dev *hdev, > > hci_update_passive_scan(hdev); > > } > > > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(status), &rp, sizeof(rp)); > > mgmt_pending_remove(cmd); > > > > @@ -5411,7 +5404,7 @@ static void mgmt_remove_adv_monitor_complete(stru= ct hci_dev *hdev, > > if (!status) > > hci_update_passive_scan(hdev); > > > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(status), &rp, sizeof(rp)); > > mgmt_pending_remove(cmd); > > > > @@ -5792,7 +5785,7 @@ static void start_discovery_complete(struct hci_d= ev *hdev, void *data, int err) > > cmd !=3D pending_find(MGMT_OP_START_SERVICE_DISCOVERY, hdev= )) > > return; > > > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, mgmt_status= (err), > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, mgmt_sta= tus(err), > > cmd->param, 1); > > mgmt_pending_remove(cmd); > > > > @@ -6013,7 +6006,7 @@ static void stop_discovery_complete(struct hci_de= v *hdev, void *data, int err) > > > > bt_dev_dbg(hdev, "err %d", err); > > > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, mgmt_status= (err), > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, mgmt_sta= tus(err), > > cmd->param, 1); > > mgmt_pending_remove(cmd); > > > > @@ -6238,7 +6231,7 @@ static void set_advertising_complete(struct hci_d= ev *hdev, void *data, int err) > > u8 status =3D mgmt_status(err); > > > > if (status) { > > - mgmt_pending_foreach(MGMT_OP_SET_ADVERTISING, hdev, > > + mgmt_pending_foreach(MGMT_OP_SET_ADVERTISING, hdev, tru= e, > > cmd_status_rsp, &status); > > return; > > } > > @@ -6248,7 +6241,7 @@ static void set_advertising_complete(struct hci_d= ev *hdev, void *data, int err) > > else > > hci_dev_clear_flag(hdev, HCI_ADVERTISING); > > > > - mgmt_pending_foreach(MGMT_OP_SET_ADVERTISING, hdev, settings_rs= p, > > + mgmt_pending_foreach(MGMT_OP_SET_ADVERTISING, hdev, true, setti= ngs_rsp, > > &match); > > > > new_settings(hdev, match.sk); > > @@ -6592,7 +6585,7 @@ static void set_bredr_complete(struct hci_dev *hd= ev, void *data, int err) > > */ > > hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED); > > > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_= err); > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, mg= mt_err); > > } else { > > send_settings_rsp(cmd->sk, MGMT_OP_SET_BREDR, hdev); > > new_settings(hdev, cmd->sk); > > @@ -6729,7 +6722,7 @@ static void set_secure_conn_complete(struct hci_d= ev *hdev, void *data, int err) > > if (err) { > > u8 mgmt_err =3D mgmt_status(err); > > > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_= err); > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, mg= mt_err); > > goto done; > > } > > > > @@ -7176,7 +7169,7 @@ static void get_conn_info_complete(struct hci_dev= *hdev, void *data, int err) > > rp.max_tx_power =3D HCI_TX_POWER_INVALID; > > } > > > > - mgmt_cmd_complete(cmd->sk, cmd->index, MGMT_OP_GET_CONN_INFO, s= tatus, > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, MGMT_OP_GET_CONN_INFO= , status, > > &rp, sizeof(rp)); > > > > mgmt_pending_free(cmd); > > @@ -7336,7 +7329,7 @@ static void get_clock_info_complete(struct hci_de= v *hdev, void *data, int err) > > } > > > > complete: > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, &rp= , > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, status, = &rp, > > sizeof(rp)); > > > > mgmt_pending_free(cmd); > > @@ -8586,10 +8579,10 @@ static void add_advertising_complete(struct hci= _dev *hdev, void *data, int err) > > rp.instance =3D cp->instance; > > > > if (err) > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(err)); > > else > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(err), &rp, sizeof(rp)); > > > > add_adv_complete(hdev, cmd->sk, cp->instance, err); > > @@ -8777,10 +8770,10 @@ static void add_ext_adv_params_complete(struct = hci_dev *hdev, void *data, > > > > hci_remove_adv_instance(hdev, cp->instance); > > > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(err)); > > } else { > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(err), &rp, sizeof(rp)); > > } > > > > @@ -8927,10 +8920,10 @@ static void add_ext_adv_data_complete(struct hc= i_dev *hdev, void *data, int err) > > rp.instance =3D cp->instance; > > > > if (err) > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(err)); > > else > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(err), &rp, sizeof(rp)); > > > > mgmt_pending_free(cmd); > > @@ -9089,10 +9082,10 @@ static void remove_advertising_complete(struct = hci_dev *hdev, void *data, > > rp.instance =3D cp->instance; > > > > if (err) > > - mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_status(cmd->sk, cmd->hdev->id, cmd->opcode, > > mgmt_status(err)); > > else > > - mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, > > + mgmt_cmd_complete(cmd->sk, cmd->hdev->id, cmd->opcode, > > MGMT_STATUS_SUCCESS, &rp, sizeof(rp))= ; > > > > mgmt_pending_free(cmd); > > @@ -9364,7 +9357,7 @@ void mgmt_index_removed(struct hci_dev *hdev) > > if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) > > return; > > > > - mgmt_pending_foreach(0, hdev, cmd_complete_rsp, &match); > > + mgmt_pending_foreach(0, hdev, true, cmd_complete_rsp, &match); > > > > if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { > > mgmt_index_event(MGMT_EV_UNCONF_INDEX_REMOVED, hdev, NU= LL, 0, > > @@ -9402,7 +9395,8 @@ void mgmt_power_on(struct hci_dev *hdev, int err) > > hci_update_passive_scan(hdev); > > } > > > > - mgmt_pending_foreach(MGMT_OP_SET_POWERED, hdev, settings_rsp, &= match); > > + mgmt_pending_foreach(MGMT_OP_SET_POWERED, hdev, true, settings_= rsp, > > + &match); > > > > new_settings(hdev, match.sk); > > > > @@ -9417,7 +9411,8 @@ void __mgmt_power_off(struct hci_dev *hdev) > > struct cmd_lookup match =3D { NULL, hdev }; > > u8 zero_cod[] =3D { 0, 0, 0 }; > > > > - mgmt_pending_foreach(MGMT_OP_SET_POWERED, hdev, settings_rsp, &= match); > > + mgmt_pending_foreach(MGMT_OP_SET_POWERED, hdev, true, settings_= rsp, > > + &match); > > > > /* If the power off is because of hdev unregistration let > > * use the appropriate INVALID_INDEX status. Otherwise use > > @@ -9431,7 +9426,7 @@ void __mgmt_power_off(struct hci_dev *hdev) > > else > > match.mgmt_status =3D MGMT_STATUS_NOT_POWERED; > > > > - mgmt_pending_foreach(0, hdev, cmd_complete_rsp, &match); > > + mgmt_pending_foreach(0, hdev, true, cmd_complete_rsp, &match); > > > > if (memcmp(hdev->dev_class, zero_cod, sizeof(zero_cod)) !=3D 0)= { > > mgmt_limited_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev, > > @@ -9672,7 +9667,6 @@ static void unpair_device_rsp(struct mgmt_pending= _cmd *cmd, void *data) > > device_unpaired(hdev, &cp->addr.bdaddr, cp->addr.type, cmd->sk)= ; > > > > cmd->cmd_complete(cmd, 0); > > - mgmt_pending_remove(cmd); > > } > > > > bool mgmt_powering_down(struct hci_dev *hdev) > > @@ -9728,8 +9722,8 @@ void mgmt_disconnect_failed(struct hci_dev *hdev,= bdaddr_t *bdaddr, > > struct mgmt_cp_disconnect *cp; > > struct mgmt_pending_cmd *cmd; > > > > - mgmt_pending_foreach(MGMT_OP_UNPAIR_DEVICE, hdev, unpair_device= _rsp, > > - hdev); > > + mgmt_pending_foreach(MGMT_OP_UNPAIR_DEVICE, hdev, true, > > + unpair_device_rsp, hdev); > > > > cmd =3D pending_find(MGMT_OP_DISCONNECT, hdev); > > if (!cmd) > > @@ -9922,7 +9916,7 @@ void mgmt_auth_enable_complete(struct hci_dev *hd= ev, u8 status) > > > > if (status) { > > u8 mgmt_err =3D mgmt_status(status); > > - mgmt_pending_foreach(MGMT_OP_SET_LINK_SECURITY, hdev, > > + mgmt_pending_foreach(MGMT_OP_SET_LINK_SECURITY, hdev, t= rue, > > cmd_status_rsp, &mgmt_err); > > return; > > } > > @@ -9932,8 +9926,8 @@ void mgmt_auth_enable_complete(struct hci_dev *hd= ev, u8 status) > > else > > changed =3D hci_dev_test_and_clear_flag(hdev, HCI_LINK_= SECURITY); > > > > - mgmt_pending_foreach(MGMT_OP_SET_LINK_SECURITY, hdev, settings_= rsp, > > - &match); > > + mgmt_pending_foreach(MGMT_OP_SET_LINK_SECURITY, hdev, true, > > + settings_rsp, &match); > > > > if (changed) > > new_settings(hdev, match.sk); > > @@ -9957,9 +9951,12 @@ void mgmt_set_class_of_dev_complete(struct hci_d= ev *hdev, u8 *dev_class, > > { > > struct cmd_lookup match =3D { NULL, hdev, mgmt_status(status) }= ; > > > > - mgmt_pending_foreach(MGMT_OP_SET_DEV_CLASS, hdev, sk_lookup, &m= atch); > > - mgmt_pending_foreach(MGMT_OP_ADD_UUID, hdev, sk_lookup, &match)= ; > > - mgmt_pending_foreach(MGMT_OP_REMOVE_UUID, hdev, sk_lookup, &mat= ch); > > + mgmt_pending_foreach(MGMT_OP_SET_DEV_CLASS, hdev, false, sk_loo= kup, > > + &match); > > + mgmt_pending_foreach(MGMT_OP_ADD_UUID, hdev, false, sk_lookup, > > + &match); > > + mgmt_pending_foreach(MGMT_OP_REMOVE_UUID, hdev, false, sk_looku= p, > > + &match); > > > > if (!status) { > > mgmt_limited_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev, = dev_class, > > diff --git a/net/bluetooth/mgmt_util.c b/net/bluetooth/mgmt_util.c > > index 3713ff490c65..a88a07da3947 100644 > > --- a/net/bluetooth/mgmt_util.c > > +++ b/net/bluetooth/mgmt_util.c > > @@ -217,30 +217,47 @@ int mgmt_cmd_complete(struct sock *sk, u16 index,= u16 cmd, u8 status, > > struct mgmt_pending_cmd *mgmt_pending_find(unsigned short channel, u16= opcode, > > struct hci_dev *hdev) > > { > > - struct mgmt_pending_cmd *cmd; > > + struct mgmt_pending_cmd *cmd, *tmp; > > > > - list_for_each_entry(cmd, &hdev->mgmt_pending, list) { > > + mutex_lock(&hdev->mgmt_pending_lock); > > + > > + list_for_each_entry_safe(cmd, tmp, &hdev->mgmt_pending, list) { > > if (hci_sock_get_channel(cmd->sk) !=3D channel) > > continue; > > - if (cmd->opcode =3D=3D opcode) > > + > > + if (cmd->opcode =3D=3D opcode) { > > + mutex_unlock(&hdev->mgmt_pending_lock); > > return cmd; > > + } > > } > > > > + mutex_unlock(&hdev->mgmt_pending_lock); > > + > > return NULL; > > } > > > > -void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev, > > +void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev, bool remov= e, > > void (*cb)(struct mgmt_pending_cmd *cmd, void= *data), > > void *data) > > { > > struct mgmt_pending_cmd *cmd, *tmp; > > > > + mutex_lock(&hdev->mgmt_pending_lock); > > + > > list_for_each_entry_safe(cmd, tmp, &hdev->mgmt_pending, list) { > > if (opcode > 0 && cmd->opcode !=3D opcode) > > continue; > > > > + if (remove) > > + list_del(&cmd->list); > > + > > cb(cmd, data); > > + > > + if (remove) > > + mgmt_pending_free(cmd); > > } > > + > > + mutex_unlock(&hdev->mgmt_pending_lock); > > } > > > > struct mgmt_pending_cmd *mgmt_pending_new(struct sock *sk, u16 opcode, > > @@ -254,7 +271,7 @@ struct mgmt_pending_cmd *mgmt_pending_new(struct so= ck *sk, u16 opcode, > > return NULL; > > > > cmd->opcode =3D opcode; > > - cmd->index =3D hdev->id; > > + cmd->hdev =3D hdev; > > > > cmd->param =3D kmemdup(data, len, GFP_KERNEL); > > if (!cmd->param) { > > @@ -280,7 +297,9 @@ struct mgmt_pending_cmd *mgmt_pending_add(struct so= ck *sk, u16 opcode, > > if (!cmd) > > return NULL; > > > > + mutex_lock(&hdev->mgmt_pending_lock); > > list_add_tail(&cmd->list, &hdev->mgmt_pending); > > + mutex_unlock(&hdev->mgmt_pending_lock); > > > > return cmd; > > } > > @@ -294,7 +313,10 @@ void mgmt_pending_free(struct mgmt_pending_cmd *cm= d) > > > > void mgmt_pending_remove(struct mgmt_pending_cmd *cmd) > > { > > + mutex_lock(&cmd->hdev->mgmt_pending_lock); > > list_del(&cmd->list); > > + mutex_unlock(&cmd->hdev->mgmt_pending_lock); > > + > > mgmt_pending_free(cmd); > > } > > > > diff --git a/net/bluetooth/mgmt_util.h b/net/bluetooth/mgmt_util.h > > index f2ba994ab1d8..024e51dd6937 100644 > > --- a/net/bluetooth/mgmt_util.h > > +++ b/net/bluetooth/mgmt_util.h > > @@ -33,7 +33,7 @@ struct mgmt_mesh_tx { > > struct mgmt_pending_cmd { > > struct list_head list; > > u16 opcode; > > - int index; > > + struct hci_dev *hdev; > > void *param; > > size_t param_len; > > struct sock *sk; > > @@ -54,7 +54,7 @@ int mgmt_cmd_complete(struct sock *sk, u16 index, u16= cmd, u8 status, > > > > struct mgmt_pending_cmd *mgmt_pending_find(unsigned short channel, u16= opcode, > > struct hci_dev *hdev); > > -void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev, > > +void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev, bool remov= e, > > void (*cb)(struct mgmt_pending_cmd *cmd, void= *data), > > void *data); > > struct mgmt_pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode, > > -- > > 2.49.0 > > > > > -- > Luiz Augusto von Dentz --=20 Luiz Augusto von Dentz