* Re: [PATCH wireless] wifi: mac80211_hwsim: don't hand frames to mac80211 while stopping
[not found] <20260904170140.5f69a10d606b.I4a7921d00643f69e439c7a3b221d104f66a3dcdc@changeid>
@ 2026-09-08 13:46 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-09-08 13:46 UTC (permalink / raw)
To: Johannes Berg, linux-wireless
Cc: llvm, oe-kbuild-all, Johannes Berg, syzbot+b4aa2b672b18f1d4dc5f
Hi Johannes,
kernel test robot noticed the following build warnings:
[auto build test WARNING on wireless-next/main]
[also build test WARNING on wireless/main linus/master v7.3-rc2 next-20260907]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Johannes-Berg/wifi-mac80211_hwsim-don-t-hand-frames-to-mac80211-while-stopping/20260904-170135
base: https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link: https://lore.kernel.org/r/20260904170140.5f69a10d606b.I4a7921d00643f69e439c7a3b221d104f66a3dcdc%40changeid
patch subject: [PATCH wireless] wifi: mac80211_hwsim: don't hand frames to mac80211 while stopping
config: sparc64-allmodconfig (https://download.01.org/0day-ci/archive/20260908/202609082134.nNCnnJQL-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260908/202609082134.nNCnnJQL-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609082134.nNCnnJQL-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/net/wireless/virtual/mac80211_hwsim_main.c:6517:6: warning: variable 'data2' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
6517 | if (skb == NULL)
| ^~~~~~~~~~~
drivers/net/wireless/virtual/mac80211_hwsim_main.c:6607:16: note: uninitialized use occurs here
6607 | mutex_unlock(&data2->mutex);
| ^~~~~
drivers/net/wireless/virtual/mac80211_hwsim_main.c:6517:2: note: remove the 'if' if its condition is always false
6517 | if (skb == NULL)
| ^~~~~~~~~~~~~~~~
6518 | goto err;
| ~~~~~~~~
drivers/net/wireless/virtual/mac80211_hwsim_main.c:6511:6: warning: variable 'data2' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
6511 | if (frame_data_len < sizeof(struct ieee80211_hdr_3addr) ||
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6512 | frame_data_len > IEEE80211_MAX_DATA_LEN)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/virtual/mac80211_hwsim_main.c:6607:16: note: uninitialized use occurs here
6607 | mutex_unlock(&data2->mutex);
| ^~~~~
drivers/net/wireless/virtual/mac80211_hwsim_main.c:6511:2: note: remove the 'if' if its condition is always false
6511 | if (frame_data_len < sizeof(struct ieee80211_hdr_3addr) ||
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6512 | frame_data_len > IEEE80211_MAX_DATA_LEN)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6513 | goto err;
| ~~~~~~~~
>> drivers/net/wireless/virtual/mac80211_hwsim_main.c:6511:6: warning: variable 'data2' is used uninitialized whenever '||' condition is true [-Wsometimes-uninitialized]
6511 | if (frame_data_len < sizeof(struct ieee80211_hdr_3addr) ||
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/virtual/mac80211_hwsim_main.c:6607:16: note: uninitialized use occurs here
6607 | mutex_unlock(&data2->mutex);
| ^~~~~
drivers/net/wireless/virtual/mac80211_hwsim_main.c:6511:6: note: remove the '||' if its condition is always false
6511 | if (frame_data_len < sizeof(struct ieee80211_hdr_3addr) ||
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/virtual/mac80211_hwsim_main.c:6492:35: note: initialize the variable 'data2' to silence this warning
6492 | struct mac80211_hwsim_data *data2;
| ^
| = NULL
3 warnings generated.
vim +6517 drivers/net/wireless/virtual/mac80211_hwsim_main.c
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6488
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6489 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6490 struct genl_info *info)
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6491 {
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6492 struct mac80211_hwsim_data *data2;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6493 struct ieee80211_rx_status rx_status;
05d610af3e71a78 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2019-07-29 6494 struct ieee80211_hdr *hdr;
9ddd12af103f60f drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2014-01-06 6495 const u8 *dst;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6496 int frame_data_len;
9ddd12af103f60f drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2014-01-06 6497 void *frame_data;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6498 struct sk_buff *skb = NULL;
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6499 struct ieee80211_channel *channel = NULL;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6500
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6501 if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6502 !info->attrs[HWSIM_ATTR_FRAME] ||
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6503 !info->attrs[HWSIM_ATTR_RX_RATE] ||
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6504 !info->attrs[HWSIM_ATTR_SIGNAL])
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6505 goto out;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6506
9ddd12af103f60f drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2014-01-06 6507 dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6508 frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
9ddd12af103f60f drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2014-01-06 6509 frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6510
fba360a047d5eee drivers/net/wireless/virtual/mac80211_hwsim.c Johannes Berg 2023-08-15 @6511 if (frame_data_len < sizeof(struct ieee80211_hdr_3addr) ||
fba360a047d5eee drivers/net/wireless/virtual/mac80211_hwsim.c Johannes Berg 2023-08-15 6512 frame_data_len > IEEE80211_MAX_DATA_LEN)
fba360a047d5eee drivers/net/wireless/virtual/mac80211_hwsim.c Johannes Berg 2023-08-15 6513 goto err;
fba360a047d5eee drivers/net/wireless/virtual/mac80211_hwsim.c Johannes Berg 2023-08-15 6514
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6515 /* Allocate new skb here */
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6516 skb = alloc_skb(frame_data_len, GFP_KERNEL);
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 @6517 if (skb == NULL)
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6518 goto err;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6519
9ddd12af103f60f drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2014-01-06 6520 /* Copy the data */
59ae1d127ac0ae4 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2017-06-16 6521 skb_put_data(skb, frame_data, frame_data_len);
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6522
9ddd12af103f60f drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2014-01-06 6523 data2 = get_hwsim_data_ref_from_addr(dst);
9ddd12af103f60f drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2014-01-06 6524 if (!data2)
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6525 goto out;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6526
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6527 if (data2->use_chanctx) {
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6528 if (data2->tmp_chan)
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6529 channel = data2->tmp_chan;
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6530 } else {
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6531 channel = data2->channel;
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6532 }
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6533
5d44fe7c9808c56 drivers/net/wireless/mac80211_hwsim.c Erel Geron 2020-03-05 6534 if (!hwsim_virtio_enabled) {
5d44fe7c9808c56 drivers/net/wireless/mac80211_hwsim.c Erel Geron 2020-03-05 6535 if (hwsim_net_get_netgroup(genl_info_net(info)) !=
5d44fe7c9808c56 drivers/net/wireless/mac80211_hwsim.c Erel Geron 2020-03-05 6536 data2->netgroup)
f21e4d8ed16bb9c drivers/net/wireless/mac80211_hwsim.c Martin Willi 2016-05-14 6537 goto out;
f21e4d8ed16bb9c drivers/net/wireless/mac80211_hwsim.c Martin Willi 2016-05-14 6538
f21e4d8ed16bb9c drivers/net/wireless/mac80211_hwsim.c Martin Willi 2016-05-14 6539 if (info->snd_portid != data2->wmediumd)
f21e4d8ed16bb9c drivers/net/wireless/mac80211_hwsim.c Martin Willi 2016-05-14 6540 goto out;
5d44fe7c9808c56 drivers/net/wireless/mac80211_hwsim.c Erel Geron 2020-03-05 6541 }
f21e4d8ed16bb9c drivers/net/wireless/mac80211_hwsim.c Martin Willi 2016-05-14 6542
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6543 /*
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6544 * Serialise against mac80211_hwsim_stop() - mac80211 doesn't allow
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6545 * frames reported while the HW is down, hence the ->started check
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6546 * must be under mutex.
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6547 */
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6548 mutex_lock(&data2->mutex);
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6549
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6550 /* check if radio is configured properly */
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6551
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6552 if ((data2->idle && !data2->tmp_chan) || !data2->started)
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6553 goto out_unlock;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6554
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6555 /* A frame is received from user space */
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6556 memset(&rx_status, 0, sizeof(rx_status));
641cf2a5ba0345c drivers/net/wireless/mac80211_hwsim.c Adam Welle 2015-12-01 6557 if (info->attrs[HWSIM_ATTR_FREQ]) {
4f4b0f4eed556c9 drivers/net/wireless/virtual/mac80211_hwsim_main.c Benjamin Berg 2026-05-06 6558 struct tx_iter_data iter_data = {
4f4b0f4eed556c9 drivers/net/wireless/virtual/mac80211_hwsim_main.c Benjamin Berg 2026-05-06 6559 .hw = data2->hw,
4f4b0f4eed556c9 drivers/net/wireless/virtual/mac80211_hwsim_main.c Benjamin Berg 2026-05-06 6560 .rx_status = &rx_status,
4f4b0f4eed556c9 drivers/net/wireless/virtual/mac80211_hwsim_main.c Benjamin Berg 2026-05-06 6561 };
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6562
641cf2a5ba0345c drivers/net/wireless/mac80211_hwsim.c Adam Welle 2015-12-01 6563 /* throw away off-channel packets, but allow both the temporary
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6564 * ("hw" scan/remain-on-channel), regular channels and links,
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6565 * since the internal datapath also allows this
4f86ed8f87c07b3 drivers/net/wireless/mac80211_hwsim.c Ben Greear 2014-10-27 6566 */
641cf2a5ba0345c drivers/net/wireless/mac80211_hwsim.c Adam Welle 2015-12-01 6567 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
641cf2a5ba0345c drivers/net/wireless/mac80211_hwsim.c Adam Welle 2015-12-01 6568
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6569 iter_data.channel = ieee80211_get_channel(data2->hw->wiphy,
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6570 rx_status.freq);
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6571 if (!iter_data.channel)
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6572 goto out_unlock;
c087f9fcd0fb534 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-09-02 6573 rx_status.band = iter_data.channel->band;
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6574
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6575 if (!hwsim_chans_compat(iter_data.channel, channel)) {
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6576 ieee80211_iterate_active_interfaces_atomic(
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6577 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
c204d9df02020e2 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-07-20 6578 mac80211_hwsim_tx_iter, &iter_data);
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6579 if (!iter_data.receive)
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6580 goto out_unlock;
641cf2a5ba0345c drivers/net/wireless/mac80211_hwsim.c Adam Welle 2015-12-01 6581 }
c087f9fcd0fb534 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-09-02 6582 } else if (!channel) {
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6583 goto out_unlock;
641cf2a5ba0345c drivers/net/wireless/mac80211_hwsim.c Adam Welle 2015-12-01 6584 } else {
626c30f9e773543 drivers/net/wireless/mac80211_hwsim.c Weilun Du 2021-05-06 6585 rx_status.freq = channel->center_freq;
c087f9fcd0fb534 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-09-02 6586 rx_status.band = channel->band;
641cf2a5ba0345c drivers/net/wireless/mac80211_hwsim.c Adam Welle 2015-12-01 6587 }
641cf2a5ba0345c drivers/net/wireless/mac80211_hwsim.c Adam Welle 2015-12-01 6588
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6589 rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
1833b6f46d7e283 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-10-05 6590 if (rx_status.rate_idx >= data2->hw->wiphy->bands[rx_status.band]->n_bitrates)
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6591 goto out_unlock;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6592 rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6593
05d610af3e71a78 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2019-07-29 6594 hdr = (void *)skb->data;
05d610af3e71a78 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2019-07-29 6595
05d610af3e71a78 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2019-07-29 6596 if (ieee80211_is_beacon(hdr->frame_control) ||
05d610af3e71a78 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2019-07-29 6597 ieee80211_is_probe_resp(hdr->frame_control))
05d610af3e71a78 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2019-07-29 6598 rx_status.boottime_ns = ktime_get_boottime_ns();
05d610af3e71a78 drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2019-07-29 6599
b1622adaa55541f drivers/net/wireless/mac80211_hwsim.c Johannes Berg 2022-09-02 6600 mac80211_hwsim_rx(data2, &rx_status, skb);
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6601 mutex_unlock(&data2->mutex);
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6602
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6603 return 0;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6604 err:
62b093b375e3c10 drivers/net/wireless/mac80211_hwsim.c Lubomir Rintel 2017-09-18 6605 pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6606 out_unlock:
a3658dbd0b37b9d drivers/net/wireless/virtual/mac80211_hwsim_main.c Johannes Berg 2026-09-04 6607 mutex_unlock(&data2->mutex);
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6608 out:
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6609 dev_kfree_skb(skb);
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6610 return -EINVAL;
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6611 }
7882513bacb176a drivers/net/wireless/mac80211_hwsim.c Javier Lopez 2011-06-01 6612
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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