Greeting,
FYI, we noticed the following commit (built with clang-14):
commit: 98ccce23287c6bc2abd5e40992146fbd795a27d6 ("[wpan-next v2 1/9] net: ieee802154: hwsim: Ensure proper channel selection at probe time")
url: https://github.com/0day-ci/linux/commits/Miquel-Raynal/ieee802154-A-bunch-of-fixes/20220120-192335
base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 1d1df41c5a33359a00e919d54eaebfb789711fdc
patch link: https://lore.kernel.org/linux-wpan/[email protected]
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------------------------------------------------+------------+------------+
| | 1d1df41c5a | 98ccce2328 |
+---------------------------------------------------------------------------------------+------------+------------+
| boot_successes | 11 | 0 |
| WARNING:suspicious_RCU_usage | 0 | 14 |
| drivers/net/ieee802154/mac802154_hwsim.c:#suspicious_rcu_dereference_protected()usage | 0 | 14 |
+---------------------------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <[email protected]>
[ 125.631089][ T1] WARNING: suspicious RCU usage
[ 125.632380][ T1] 5.16.0-11201-g98ccce23287c #1 Not tainted
[ 125.633728][ T1] -----------------------------
[ 125.634782][ T1] drivers/net/ieee802154/mac802154_hwsim.c:103 suspicious rcu_dereference_protected() usage!
[ 125.637107][ T1]
[ 125.637107][ T1] other info that might help us debug this:
[ 125.637107][ T1]
[ 125.639290][ T1]
[ 125.639290][ T1] rcu_scheduler_active = 2, debug_locks = 1
[ 125.641218][ T1] 1 lock held by swapper/0/1:
[ 125.642313][ T1] #0: ffff8881709ac188 (&dev->mutex){....}-{3:3}, at: __driver_attach (drivers/base/dd.c:1141)
[ 125.644487][ T1]
[ 125.644487][ T1] stack backtrace:
[ 125.646112][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.16.0-11201-g98ccce23287c #1 2e4e82a5ad58a18340e5b3bf7e4ce54853ca765f
[ 125.648776][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 125.649379][ T1] Call Trace:
[ 125.649379][ T1] <TASK>
[ 125.649379][ T1] dump_stack_lvl (lib/dump_stack.c:107)
[ 125.649379][ T1] hwsim_hw_channel (drivers/net/ieee802154/mac802154_hwsim.c:103)
[ 125.649379][ T1] hwsim_add_one (drivers/net/ieee802154/mac802154_hwsim.c:?)
[ 125.649379][ T1] hwsim_probe (drivers/net/ieee802154/mac802154_hwsim.c:846)
[ 125.649379][ T1] platform_probe (drivers/base/platform.c:1417)
[ 125.649379][ T1] really_probe (drivers/base/dd.c:? drivers/base/dd.c:596)
[ 125.649379][ T1] __driver_probe_device (drivers/base/dd.c:752)
[ 125.649379][ T1] driver_probe_device (drivers/base/dd.c:782)
[ 125.649379][ T1] __driver_attach (drivers/base/dd.c:1142)
[ 125.649379][ T1] ? driver_attach (drivers/base/dd.c:1094)
[ 125.649379][ T1] bus_for_each_dev (drivers/base/bus.c:300)
[ 125.649379][ T1] bus_add_driver (drivers/base/bus.c:618)
[ 125.649379][ T1] driver_register (drivers/base/driver.c:171)
[ 125.649379][ T1] hwsim_init_module (drivers/net/ieee802154/mac802154_hwsim.c:897)
[ 125.649379][ T1] do_one_initcall (include/linux/instrumented.h:71 include/linux/atomic/atomic-instrumented.h:27 include/linux/jump_label.h:266 include/linux/jump_label.h:276 include/trace/events/initcall.h:48 init/main.c:1298)
[ 125.649379][ T1] ? mcr20a_driver_init (drivers/net/ieee802154/mac802154_hwsim.c:882)
[ 125.649379][ T1] ? rcu_read_lock_sched_held (include/linux/lockdep.h:? kernel/rcu/update.c:125)
[ 125.649379][ T1] do_initcall_level (init/main.c:1369)
[ 125.649379][ T1] do_initcalls (init/main.c:1383)
[ 125.649379][ T1] kernel_init_freeable (init/main.c:1612)
[ 125.649379][ T1] ? rest_init (init/main.c:1491)
[ 125.649379][ T1] kernel_init (init/main.c:1501)
[ 125.649379][ T1] ? rest_init (init/main.c:1491)
[ 125.649379][ T1] ret_from_fork (??:?)
[ 125.649379][ T1] </TASK>
[ 125.687993][ T1] mac802154_hwsim mac802154_hwsim: Added 2 mac802154 hwsim hardware radios
[ 125.690601][ T1] VMware vmxnet3 virtual NIC driver - version 1.6.0.0-k-NAPI
[ 125.692817][ T1] usbcore: registered new interface driver catc
[ 125.694198][ T1] pegasus: Pegasus/Pegasus II USB Ethernet driver
[ 125.696020][ T1] usbcore: registered new interface driver pegasus
[ 125.699113][ T1] usbcore: registered new interface driver rtl8150
[ 125.700638][ T1] hso: drivers/net/usb/hso.c: Option Wireless
[ 125.702431][ T1] usbcore: registered new interface driver hso
[ 125.703921][ T1] usbcore: registered new interface driver lan78xx
[ 125.705783][ T1] usbcore: registered new interface driver asix
[ 125.707474][ T1] usbcore: registered new interface driver ax88179_178a
[ 125.709348][ T1] usbcore: registered new interface driver cdc_ether
[ 125.710834][ T1] usbcore: registered new interface driver sr9700
[ 125.712638][ T1] usbcore: registered new interface driver smsc75xx
[ 125.714478][ T1] usbcore: registered new interface driver smsc95xx
[ 125.716294][ T1] usbcore: registered new interface driver gl620a
[ 125.717997][ T1] usbcore: registered new interface driver plusb
[ 125.719663][ T1] usbcore: registered new interface driver rndis_host
[ 125.721363][ T1] usbcore: registered new interface driver zaurus
[ 125.723177][ T1] usbcore: registered new interface driver int51x1
[ 125.724871][ T1] usbcore: registered new interface driver cdc_phonet
[ 125.726603][ T1] usbcore: registered new interface driver ipheth
[ 125.728344][ T1] usbcore: registered new interface driver sierra_net
[ 125.730163][ T1] usbcore: registered new interface driver cx82310_eth
[ 125.731980][ T1] usbcore: registered new interface driver cdc_ncm
[ 125.733751][ T1] usbcore: registered new interface driver huawei_cdc_ncm
[ 125.735587][ T1] usbcore: registered new interface driver lg-vl600
[ 125.737320][ T1] usbcore: registered new interface driver cdc_mbim
[ 125.739070][ T1] usbcore: registered new interface driver ch9200
[ 125.741018][ T1] Fusion MPT base driver 3.04.20
[ 125.742335][ T1] Copyright (c) 1999-2008 LSI Corporation
[ 125.743734][ T1] Fusion MPT SPI Host driver 3.04.20
[ 125.745365][ T1] Fusion MPT SAS Host driver 3.04.20
[ 125.746920][ T1] Fusion MPT misc device (ioctl) driver 3.04.20
[ 125.748844][ T1] mptctl: Registered with Fusion MPT base driver
[ 125.750192][ T1] mptctl: /dev/mptctl @ (major,minor=10,220)
[ 125.761147][ T1] uhci_hcd: USB Universal Host Controller Interface driver
[ 125.764406][ T1] driver u132_hcd
[ 125.766705][ T1] fotg210_hcd: FOTG210 Host Controller (EHCI) Driver
[ 125.768277][ T1] Warning! fotg210_hcd should always be loaded before uhci_hcd and ohci_hcd, not after
[ 125.771294][ T1] usbcore: registered new interface driver cdc_acm
[ 125.772933][ T1] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 125.777124][ T1] usbcore: registered new interface driver cdc_wdm
[ 125.778822][ T1] usbcore: registered new interface driver usbtmc
[ 125.781162][ T1] usbcore: registered new interface driver uas
[ 125.783087][ T1] usbcore: registered new interface driver usb-storage
[ 125.784949][ T1] usbcore: registered new interface driver ums-datafab
[ 125.786607][ T1] usbcore: registered new interface driver ums-freecom
[ 125.788273][ T1] usbcore: registered new interface driver ums-jumpshot
[ 125.790014][ T1] usbcore: registered new interface driver ums-karma
[ 125.791755][ T1] usbcore: registered new interface driver ums-onetouch
[ 125.793556][ T1] usbcore: registered new interface driver ums-sddr09
[ 125.795264][ T1] usbcore: registered new interface driver ums-sddr55
[ 125.796911][ T1] usbcore: registered new interface driver microtekX6
[ 125.798914][ T1] usbcore: registered new interface driver usbserial_generic
[ 125.800876][ T1] usbserial: USB Serial support registered for generic
[ 125.802814][ T1] usbcore: registered new interface driver aircable
[ 125.804535][ T1] usbserial: USB Serial support registered for aircable
[ 125.806275][ T1] usbcore: registered new interface driver ark3116
To reproduce:
# build kernel
cd linux
cp config-5.16.0-11201-g98ccce23287c .config
make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/[email protected] Intel Corporation
Thanks,
Oliver Sang