Hi,
this triggers is on 5.11-rc3 + tip/x86/urgent (shouldn't matter tho),
32-bit kernel:
[ 10.019444] rtl8192ce: Chip Version ID: B_CHIP_88C
[ 10.042810] rtl8192ce: Using firmware rtlwifi/rtl8192cfw.bin
[ 10.044258] =============================
[ 10.044337] WARNING: suspicious RCU usage
[ 10.044417] 5.11.0-rc3+ #1 Not tainted
[ 10.044494] -----------------------------
[ 10.044572] net/wireless/reg.c:144 suspicious rcu_dereference_check() usage!
[ 10.044696]
other info that might help us debug this:
[ 10.044833]
rcu_scheduler_active = 2, debug_locks = 1
[ 10.044950] 1 lock held by udevd/301:
[ 10.045025] #0: c2ef8944 (&dev->mutex){....}-{3:3}, at: device_driver_attach+0x37/0xc0
[ 10.045230]
stack backtrace:
[ 10.045316] CPU: 0 PID: 301 Comm: udevd Not tainted 5.11.0-rc3+ #1
[ 10.045428] Hardware name: LENOVO 30515QG/30515QG, BIOS 8RET30WW (1.12 ) 09/15/2011
[ 10.045561] Call Trace:
[ 10.045619] dump_stack+0x6d/0x8b
[ 10.045694] lockdep_rcu_suspicious+0xbb/0xc4
[ 10.045787] get_wiphy_regdom+0x55/0x60 [cfg80211]
[ 10.045995] wiphy_apply_custom_regulatory+0xa4/0xe0 [cfg80211]
[ 10.046191] ? rtl_regd_init+0x180/0x180 [rtlwifi]
[ 10.046299] rtl_regd_init+0xd6/0x180 [rtlwifi]
[ 10.046399] rtl_init_core+0x1d7/0x910 [rtlwifi]
[ 10.046500] ? __const_udelay+0x35/0x40
[ 10.046583] rtl_pci_probe+0x776/0x1080 [rtl_pci]
[ 10.046675] ? _raw_spin_unlock_irqrestore+0x55/0x70
[ 10.046770] ? _raw_spin_unlock_irqrestore+0x38/0x70
[ 10.046863] ? __pm_runtime_resume+0x5a/0x90
[ 10.046950] ? trace_preempt_on+0x29/0xc0
[ 10.047033] ? __pm_runtime_resume+0x5a/0x90
[ 10.047118] ? preempt_count_sub+0xb9/0x110
[ 10.047204] ? _raw_spin_unlock_irqrestore+0x7/0x70
[ 10.047297] ? __pm_runtime_resume+0x5a/0x90
[ 10.047383] pci_device_probe+0xa4/0x110
[ 10.047465] ? sysfs_create_link+0x22/0x40
[ 10.047551] really_probe+0xd3/0x450
[ 10.047625] ? _raw_spin_unlock_irq+0x2d/0x50
[ 10.047711] driver_probe_device+0x5a/0x1b0
[ 10.047793] ? pci_match_device+0xbe/0xf0
[ 10.047873] ? preempt_count_sub+0xb9/0x110
[ 10.047960] device_driver_attach+0xb1/0xc0
[ 10.048044] __driver_attach+0x99/0x150
[ 10.048122] ? klist_next+0x93/0x140
[ 10.048199] ? device_driver_attach+0xc0/0xc0
[ 10.048283] bus_for_each_dev+0x5d/0xa0
[ 10.048364] driver_attach+0x1e/0x20
[ 10.048437] ? device_driver_attach+0xc0/0xc0
[ 10.048521] bus_add_driver+0x11f/0x1f0
[ 10.048602] driver_register+0x7f/0xd0
[ 10.048681] ? 0xf7f04000
[ 10.048741] __pci_register_driver+0x5c/0x70
[ 10.048826] rtl92ce_driver_init+0x1c/0x1000 [rtl8192ce]
[ 10.048933] do_one_initcall+0x5c/0x2f0
[ 10.049012] ? rcu_read_lock_sched_held+0x41/0x80
[ 10.049105] ? trace_kmalloc+0x53/0xf0
[ 10.049184] ? kmem_cache_alloc_trace+0xdf/0x1b0
[ 10.049273] ? do_init_module+0x24/0x260
[ 10.049354] do_init_module+0x53/0x260
[ 10.049433] load_module+0x2525/0x2b10
[ 10.049517] ? kernel_read+0x3e/0x50
[ 10.049600] __ia32_sys_finit_module+0xbd/0x120
[ 10.049698] __do_fast_syscall_32+0x54/0x80
[ 10.049781] do_fast_syscall_32+0x30/0x70
[ 10.049861] do_SYSENTER_32+0x15/0x20
[ 10.049936] entry_SYSENTER_32+0x9f/0xf2
[ 10.050016] EIP: 0xb7f46549
[ 10.050079] Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
[ 10.050376] EAX: ffffffda EBX: 0000000f ECX: b7ce5e63 EDX: 00000000
[ 10.050486] ESI: 00bf8ed0 EDI: 00beb080 EBP: 00bf7f50 ESP: bfef492c
[ 10.050596] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246
[ 10.060833] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 10.066096] rtlwifi: rtlwifi: wireless switch is on
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
