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Message-ID: <202111221858.90k9xMmG-lkp@intel.com>
Date: Mon, 22 Nov 2021 19:00:55 +0800
From: kernel test robot <lkp@...el.com>
To: Manish Mandlik <mmandlik@...gle.com>, marcel@...tmann.org,
luiz.dentz@...il.com
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-bluetooth@...r.kernel.org,
chromeos-bluetooth-upstreaming@...omium.org,
Manish Mandlik <mmandlik@...gle.com>,
Miao-chen Chou <mcchou@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Johan Hedberg <johan.hedberg@...il.com>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v6 2/2] bluetooth: Add MGMT Adv Monitor Device Found/Lost
events
Hi Manish,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on bluetooth-next/master]
[also build test WARNING on next-20211118]
[cannot apply to bluetooth/master v5.16-rc2]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Manish-Mandlik/bluetooth-Handle-MSFT-Monitor-Device-Event/20211122-031347
base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master
config: hexagon-randconfig-r005-20211122 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c133fb321f7ca6083ce15b6aa5bf89de6600e649)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/b61f97a7820d3965cf6e5bbf719449c667bf1925
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Manish-Mandlik/bluetooth-Handle-MSFT-Monitor-Device-Event/20211122-031347
git checkout b61f97a7820d3965cf6e5bbf719449c667bf1925
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> net/bluetooth/mgmt.c:9601:6: warning: stack frame size (1120) exceeds limit (1024) in 'mgmt_device_found' [-Wframe-larger-than]
void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
^
1 warning generated.
vim +/mgmt_device_found +9601 net/bluetooth/mgmt.c
b61f97a7820d39 Manish Mandlik 2021-11-21 9600
48f86b7f267335 Jakub Pawlowski 2015-03-04 @9601 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
48f86b7f267335 Jakub Pawlowski 2015-03-04 9602 u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
48f86b7f267335 Jakub Pawlowski 2015-03-04 9603 u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len)
48f86b7f267335 Jakub Pawlowski 2015-03-04 9604 {
48f86b7f267335 Jakub Pawlowski 2015-03-04 9605 char buf[512];
48f86b7f267335 Jakub Pawlowski 2015-03-04 9606 struct mgmt_ev_device_found *ev = (void *)buf;
48f86b7f267335 Jakub Pawlowski 2015-03-04 9607 size_t ev_size;
48f86b7f267335 Jakub Pawlowski 2015-03-04 9608
48f86b7f267335 Jakub Pawlowski 2015-03-04 9609 /* Don't send events for a non-kernel initiated discovery. With
48f86b7f267335 Jakub Pawlowski 2015-03-04 9610 * LE one exception is if we have pend_le_reports > 0 in which
48f86b7f267335 Jakub Pawlowski 2015-03-04 9611 * case we're doing passive scanning and want these events.
48f86b7f267335 Jakub Pawlowski 2015-03-04 9612 */
48f86b7f267335 Jakub Pawlowski 2015-03-04 9613 if (!hci_discovery_active(hdev)) {
48f86b7f267335 Jakub Pawlowski 2015-03-04 9614 if (link_type == ACL_LINK)
48f86b7f267335 Jakub Pawlowski 2015-03-04 9615 return;
8208f5a9d435e5 Miao-chen Chou 2020-06-17 9616 if (link_type == LE_LINK &&
8208f5a9d435e5 Miao-chen Chou 2020-06-17 9617 list_empty(&hdev->pend_le_reports) &&
8208f5a9d435e5 Miao-chen Chou 2020-06-17 9618 !hci_is_adv_monitoring(hdev)) {
48f86b7f267335 Jakub Pawlowski 2015-03-04 9619 return;
48f86b7f267335 Jakub Pawlowski 2015-03-04 9620 }
8208f5a9d435e5 Miao-chen Chou 2020-06-17 9621 }
48f86b7f267335 Jakub Pawlowski 2015-03-04 9622
82f8b651a94d5c Jakub Pawlowski 2015-03-04 9623 if (hdev->discovery.result_filtering) {
48f86b7f267335 Jakub Pawlowski 2015-03-04 9624 /* We are using service discovery */
48f86b7f267335 Jakub Pawlowski 2015-03-04 9625 if (!is_filter_match(hdev, rssi, eir, eir_len, scan_rsp,
48f86b7f267335 Jakub Pawlowski 2015-03-04 9626 scan_rsp_len))
48f86b7f267335 Jakub Pawlowski 2015-03-04 9627 return;
48f86b7f267335 Jakub Pawlowski 2015-03-04 9628 }
48f86b7f267335 Jakub Pawlowski 2015-03-04 9629
78b781ca0d3519 Johan Hedberg 2016-01-05 9630 if (hdev->discovery.limited) {
78b781ca0d3519 Johan Hedberg 2016-01-05 9631 /* Check for limited discoverable bit */
78b781ca0d3519 Johan Hedberg 2016-01-05 9632 if (dev_class) {
78b781ca0d3519 Johan Hedberg 2016-01-05 9633 if (!(dev_class[1] & 0x20))
78b781ca0d3519 Johan Hedberg 2016-01-05 9634 return;
78b781ca0d3519 Johan Hedberg 2016-01-05 9635 } else {
78b781ca0d3519 Johan Hedberg 2016-01-05 9636 u8 *flags = eir_get_data(eir, eir_len, EIR_FLAGS, NULL);
78b781ca0d3519 Johan Hedberg 2016-01-05 9637 if (!flags || !(flags[0] & LE_AD_LIMITED))
78b781ca0d3519 Johan Hedberg 2016-01-05 9638 return;
78b781ca0d3519 Johan Hedberg 2016-01-05 9639 }
78b781ca0d3519 Johan Hedberg 2016-01-05 9640 }
78b781ca0d3519 Johan Hedberg 2016-01-05 9641
48f86b7f267335 Jakub Pawlowski 2015-03-04 9642 /* Make sure that the buffer is big enough. The 5 extra bytes
48f86b7f267335 Jakub Pawlowski 2015-03-04 9643 * are for the potential CoD field.
48f86b7f267335 Jakub Pawlowski 2015-03-04 9644 */
48f86b7f267335 Jakub Pawlowski 2015-03-04 9645 if (sizeof(*ev) + eir_len + scan_rsp_len + 5 > sizeof(buf))
4b0e0ceddf085a Jakub Pawlowski 2015-02-01 9646 return;
4b0e0ceddf085a Jakub Pawlowski 2015-02-01 9647
48f86b7f267335 Jakub Pawlowski 2015-03-04 9648 memset(buf, 0, sizeof(buf));
48f86b7f267335 Jakub Pawlowski 2015-03-04 9649
48f86b7f267335 Jakub Pawlowski 2015-03-04 9650 /* In case of device discovery with BR/EDR devices (pre 1.2), the
48f86b7f267335 Jakub Pawlowski 2015-03-04 9651 * RSSI value was reported as 0 when not available. This behavior
48f86b7f267335 Jakub Pawlowski 2015-03-04 9652 * is kept when using device discovery. This is required for full
48f86b7f267335 Jakub Pawlowski 2015-03-04 9653 * backwards compatibility with the API.
48f86b7f267335 Jakub Pawlowski 2015-03-04 9654 *
48f86b7f267335 Jakub Pawlowski 2015-03-04 9655 * However when using service discovery, the value 127 will be
48f86b7f267335 Jakub Pawlowski 2015-03-04 9656 * returned when the RSSI is not available.
48f86b7f267335 Jakub Pawlowski 2015-03-04 9657 */
48f86b7f267335 Jakub Pawlowski 2015-03-04 9658 if (rssi == HCI_RSSI_INVALID && !hdev->discovery.report_invalid_rssi &&
48f86b7f267335 Jakub Pawlowski 2015-03-04 9659 link_type == ACL_LINK)
48f86b7f267335 Jakub Pawlowski 2015-03-04 9660 rssi = 0;
48f86b7f267335 Jakub Pawlowski 2015-03-04 9661
48f86b7f267335 Jakub Pawlowski 2015-03-04 9662 bacpy(&ev->addr.bdaddr, bdaddr);
48f86b7f267335 Jakub Pawlowski 2015-03-04 9663 ev->addr.type = link_to_bdaddr(link_type, addr_type);
48f86b7f267335 Jakub Pawlowski 2015-03-04 9664 ev->rssi = rssi;
48f86b7f267335 Jakub Pawlowski 2015-03-04 9665 ev->flags = cpu_to_le32(flags);
48f86b7f267335 Jakub Pawlowski 2015-03-04 9666
48f86b7f267335 Jakub Pawlowski 2015-03-04 9667 if (eir_len > 0)
48f86b7f267335 Jakub Pawlowski 2015-03-04 9668 /* Copy EIR or advertising data into event */
48f86b7f267335 Jakub Pawlowski 2015-03-04 9669 memcpy(ev->eir, eir, eir_len);
48f86b7f267335 Jakub Pawlowski 2015-03-04 9670
0d3b7f64c84d53 Johan Hedberg 2016-01-05 9671 if (dev_class && !eir_get_data(ev->eir, eir_len, EIR_CLASS_OF_DEV,
0d3b7f64c84d53 Johan Hedberg 2016-01-05 9672 NULL))
48f86b7f267335 Jakub Pawlowski 2015-03-04 9673 eir_len = eir_append_data(ev->eir, eir_len, EIR_CLASS_OF_DEV,
48f86b7f267335 Jakub Pawlowski 2015-03-04 9674 dev_class, 3);
48f86b7f267335 Jakub Pawlowski 2015-03-04 9675
48f86b7f267335 Jakub Pawlowski 2015-03-04 9676 if (scan_rsp_len > 0)
48f86b7f267335 Jakub Pawlowski 2015-03-04 9677 /* Append scan response data to event */
48f86b7f267335 Jakub Pawlowski 2015-03-04 9678 memcpy(ev->eir + eir_len, scan_rsp, scan_rsp_len);
48f86b7f267335 Jakub Pawlowski 2015-03-04 9679
5d2e9fadf43e87 Johan Hedberg 2014-03-25 9680 ev->eir_len = cpu_to_le16(eir_len + scan_rsp_len);
5d2e9fadf43e87 Johan Hedberg 2014-03-25 9681 ev_size = sizeof(*ev) + eir_len + scan_rsp_len;
f8523598ee608a Andre Guedes 2011-09-09 9682
b61f97a7820d39 Manish Mandlik 2021-11-21 9683 /* We have received the Advertisement Report because:
b61f97a7820d39 Manish Mandlik 2021-11-21 9684 * 1. the kernel has initiated active discovery
b61f97a7820d39 Manish Mandlik 2021-11-21 9685 * 2. if not, we have pend_le_reports > 0 in which case we are doing
b61f97a7820d39 Manish Mandlik 2021-11-21 9686 * passive scanning
b61f97a7820d39 Manish Mandlik 2021-11-21 9687 * 3. if none of the above is true, we have one or more active
b61f97a7820d39 Manish Mandlik 2021-11-21 9688 * Advertisement Monitor
b61f97a7820d39 Manish Mandlik 2021-11-21 9689 *
b61f97a7820d39 Manish Mandlik 2021-11-21 9690 * For case 1 and 2, report all advertisements via MGMT_EV_DEVICE_FOUND
b61f97a7820d39 Manish Mandlik 2021-11-21 9691 * and report ONLY one advertisement per device for the matched Monitor
b61f97a7820d39 Manish Mandlik 2021-11-21 9692 * via MGMT_EV_ADV_MONITOR_DEVICE_FOUND event.
b61f97a7820d39 Manish Mandlik 2021-11-21 9693 *
b61f97a7820d39 Manish Mandlik 2021-11-21 9694 * For case 3, since we are not active scanning and all advertisements
b61f97a7820d39 Manish Mandlik 2021-11-21 9695 * received are due to a matched Advertisement Monitor, report all
b61f97a7820d39 Manish Mandlik 2021-11-21 9696 * advertisements ONLY via MGMT_EV_ADV_MONITOR_DEVICE_FOUND event.
b61f97a7820d39 Manish Mandlik 2021-11-21 9697 */
b61f97a7820d39 Manish Mandlik 2021-11-21 9698
b61f97a7820d39 Manish Mandlik 2021-11-21 9699 if (hci_discovery_active(hdev) ||
b61f97a7820d39 Manish Mandlik 2021-11-21 9700 (link_type == LE_LINK && !list_empty(&hdev->pend_le_reports))) {
901801b9a420e5 Marcel Holtmann 2013-10-06 9701 mgmt_event(MGMT_EV_DEVICE_FOUND, hdev, ev, ev_size, NULL);
b61f97a7820d39 Manish Mandlik 2021-11-21 9702
b61f97a7820d39 Manish Mandlik 2021-11-21 9703 if (hdev->advmon_pend_notify)
b61f97a7820d39 Manish Mandlik 2021-11-21 9704 mgmt_adv_monitor_device_found(hdev, ev, ev_size, true);
b61f97a7820d39 Manish Mandlik 2021-11-21 9705 } else {
b61f97a7820d39 Manish Mandlik 2021-11-21 9706 mgmt_adv_monitor_device_found(hdev, ev, ev_size, false);
b61f97a7820d39 Manish Mandlik 2021-11-21 9707 }
e17acd40f6006d Johan Hedberg 2011-03-30 9708 }
a88a9652d25a63 Johan Hedberg 2011-03-30 9709
---
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