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Message-ID: <202501221104.9fe82ac4-lkp@intel.com>
Date: Wed, 22 Jan 2025 12:47:20 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Russell King <rmk+kernel@...linux.org.uk>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, Jakub Kicinski
<kuba@...nel.org>, Jacob Keller <jacob.e.keller@...el.com>,
<netdev@...r.kernel.org>, <oliver.sang@...el.com>
Subject: [linux-next:master] [net] 03abf2a7c6: WARNING:suspicious_RCU_usage
Hello,
kernel test robot noticed "WARNING:suspicious_RCU_usage" on:
commit: 03abf2a7c65451e663b078b0ed1bfa648cd9380f ("net: phylink: add EEE management")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
[test failed on linux-next/master f066b5a6c7a06adfb666b7652cc99b4ff264f4ed]
in testcase: boot
config: i386-randconfig-141-20250120
compiler: clang-19
test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+---------------------------------------------------------------------------+------------+------------+
| | a17ceec62f | 03abf2a7c6 |
+---------------------------------------------------------------------------+------------+------------+
| WARNING:suspicious_RCU_usage | 0 | 12 |
| drivers/net/phy/phy_device.c:#suspicious_rcu_dereference_protected()usage | 0 | 12 |
+---------------------------------------------------------------------------+------------+------------+
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 <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202501221104.9fe82ac4-lkp@intel.com
[ 9.233895][ T7] WARNING: suspicious RCU usage
[ 9.234510][ T7] 6.13.0-rc7-01139-g03abf2a7c654 #1 Tainted: G T
[ 9.235566][ T7] -----------------------------
[ 9.236305][ T7] drivers/net/phy/phy_device.c:2004 suspicious rcu_dereference_protected() usage!
[ 9.237605][ T7]
[ 9.237605][ T7] other info that might help us debug this:
[ 9.237605][ T7]
[ 9.239057][ T7]
[ 9.239057][ T7] rcu_scheduler_active = 2, debug_locks = 1
[ 9.240153][ T7] 4 locks held by kworker/u4:0/7:
[ 9.240882][ T7] #0: c5111cc0 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3211)
[ 9.242349][ T7] #1: c951bef0 (deferred_probe_work){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:?)
[ 9.243712][ T7] #2: c75e6c80 (&dev->mutex){....}-{4:4}, at: __device_attach (drivers/base/dd.c:1006)
[ 9.244868][ T7] #3: c3f31254 (dsa2_mutex){+.+.}-{4:4}, at: dsa_register_switch (net/dsa/dsa.c:1499)
[ 9.246218][ T7]
[ 9.246218][ T7] stack backtrace:
[ 9.247150][ T7] CPU: 0 UID: 0 PID: 7 Comm: kworker/u4:0 Tainted: G T 6.13.0-rc7-01139-g03abf2a7c654 #1
[ 9.248636][ T7] Tainted: [T]=RANDSTRUCT
[ 9.249165][ T7] Workqueue: events_unbound deferred_probe_work_func
[ 9.250080][ T7] Call Trace:
[ 9.250503][ T7] dump_stack_lvl (lib/dump_stack.c:? lib/dump_stack.c:120)
[ 9.251092][ T7] dump_stack (lib/dump_stack.c:129)
[ 9.251610][ T7] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6846)
[ 9.252284][ T7] phy_detach (drivers/net/phy/phy_device.c:2004)
[ 9.252804][ T7] phylink_connect_phy (drivers/net/phy/phylink.c:?)
[ 9.253421][ T7] dsa_user_create (net/dsa/user.c:2657)
[ 9.254067][ T7] dsa_port_setup (net/dsa/dsa.c:523)
[ 9.254648][ T7] dsa_register_switch (net/dsa/dsa.c:759 net/dsa/dsa.c:888 net/dsa/dsa.c:1525 net/dsa/dsa.c:1539)
[ 9.255298][ T7] dsa_loop_drv_probe (drivers/net/dsa/dsa_loop.c:343)
[ 9.255927][ T7] mdio_probe (drivers/net/phy/mdio_device.c:166)
[ 9.256445][ T7] really_probe (drivers/base/dd.c:581)
[ 9.257004][ T7] __driver_probe_device (drivers/base/dd.c:800)
[ 9.257624][ T7] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:? kernel/locking/lockdep.c:4406)
[ 9.258384][ T7] ? trace_hardirqs_on (kernel/trace/trace_preemptirq.c:80)
[ 9.259006][ T7] driver_probe_device (drivers/base/dd.c:830)
[ 9.259624][ T7] __device_attach_driver (drivers/base/dd.c:959)
[ 9.260257][ T7] ? coredump_store (drivers/base/dd.c:922)
[ 9.260846][ T7] bus_for_each_drv (drivers/base/bus.c:459)
[ 9.261459][ T7] __device_attach (drivers/base/dd.c:1030)
[ 9.274224][ T7] ? coredump_store (drivers/base/dd.c:922)
[ 9.274849][ T7] device_initial_probe (drivers/base/dd.c:1080)
[ 9.275481][ T7] bus_probe_device (drivers/base/bus.c:536)
[ 9.276057][ T7] deferred_probe_work_func (drivers/base/dd.c:124)
[ 9.276734][ T7] process_one_work (kernel/workqueue.c:3241)
[ 9.277401][ T7] worker_thread (kernel/workqueue.c:3311 kernel/workqueue.c:3398)
[ 9.278006][ T7] kthread (kernel/kthread.c:391)
[ 9.278532][ T7] ? worker_attach_to_pool (kernel/workqueue.c:3344)
[ 9.279213][ T7] ? kthread_blkcg (kernel/kthread.c:342)
[ 9.279803][ T7] ? kthread_blkcg (kernel/kthread.c:342)
[ 9.280398][ T7] ret_from_fork (arch/x86/kernel/process.c:153)
[ 9.280951][ T7] ret_from_fork_asm (arch/x86/entry/entry_32.S:737)
[ 9.281536][ T7] entry_INT80_32 (arch/x86/entry/entry_32.S:945)
[ 9.282546][ T7] dsa-loop fixed-0:1f lan1 (uninitialized): failed to connect to PHY: -EPERM
[ 9.283900][ T7] dsa-loop fixed-0:1f lan1 (uninitialized): error -1 setting up PHY for tree 0, switch 0, port 0
[ 9.285629][ T7] dsa-loop fixed-0:1f lan2 (uninitialized): PHY [dsa-0.0:01] driver [Generic PHY] (irq=POLL)
[ 9.287170][ T7] dsa-loop fixed-0:1f lan2 (uninitialized): failed to connect to PHY: -EPERM
[ 9.288436][ T7] dsa-loop fixed-0:1f lan2 (uninitialized): error -1 setting up PHY for tree 0, switch 0, port 1
[ 9.290098][ T7] dsa-loop fixed-0:1f lan3 (uninitialized): PHY [dsa-0.0:02] driver [Generic PHY] (irq=POLL)
[ 9.291626][ T7] dsa-loop fixed-0:1f lan3 (uninitialized): failed to connect to PHY: -EPERM
[ 9.292898][ T7] dsa-loop fixed-0:1f lan3 (uninitialized): error -1 setting up PHY for tree 0, switch 0, port 2
[ 9.294593][ T7] dsa-loop fixed-0:1f lan4 (uninitialized): PHY [dsa-0.0:03] driver [Generic PHY] (irq=POLL)
[ 9.296110][ T7] dsa-loop fixed-0:1f lan4 (uninitialized): failed to connect to PHY: -EPERM
[ 9.297398][ T7] dsa-loop fixed-0:1f lan4 (uninitialized): error -1 setting up PHY for tree 0, switch 0, port 3
[ 9.299343][ T7] DSA: tree 0 setup
[ 9.299993][ T7] dsa-loop fixed-0:1f: DSA mockup driver: 0x1f
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250122/202501221104.9fe82ac4-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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