Bug 211575

Summary: [rtl8139] inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
Product: Process Management Reporter: Erhard F. (erhard_f)
Component: OtherAssignee: process_other
Status: RESOLVED OBSOLETE    
Severity: normal CC: davem, kuba, kubakici
Priority: P1    
Hardware: i386   
OS: Linux   
See Also: https://bugzilla.kernel.org/show_bug.cgi?id=212509
https://bugzilla.kernel.org/show_bug.cgi?id=214027
Kernel Version: 5.11-rc5 Subsystem:
Regression: No Bisected commit-id:
Attachments: dmesg (kernel 5.11-rc6, Shuttle XPC FS51, Pentium 4)
kernel .config (kernel 5.11-rc6, Shuttle XPC FS51, Pentium 4)
dmesg (kernel 5.12-rc1, Shuttle XPC FS51, Pentium 4)
dmesg (kernel 5.12.1, Shuttle XPC FS51, Pentium 4)
kernel .config (kernel 5.12.1, Shuttle XPC FS51, Pentium 4)
dmesg (kernel 5.14-rc2, Shuttle XPC FS51, Pentium 4)
kernel .config (kernel 5.14-rc2, Shuttle XPC FS51, Pentium 4)
dmesg (kernel 5.15-rc6, Shuttle XPC FS51, Pentium 4)
kernel .config (kernel 5.15-rc6, Shuttle XPC FS51, Pentium 4)
dmesg (kernel 5.17-rc3, Shuttle XPC FS51, Pentium 4)
kernel .config (kernel 5.17-rc3, Shuttle XPC FS51, Pentium 4)

Description Erhard F. 2021-02-05 09:20:23 UTC 
Created attachment 295071 [details]
dmesg (kernel 5.11-rc6, Shuttle XPC FS51, Pentium 4)

Happens every time at booting since I got netconsole enabled.

[...]
netpoll: netconsole: local port 6666
netpoll: netconsole: local IPv4 address 192.168.2.7
netpoll: netconsole: interface 'eth0'
netpoll: netconsole: remote port 6666
netpoll: netconsole: remote IPv4 address 192.168.2.3
netpoll: netconsole: remote ethernet address xx:xx:xx:xx:xx:xx
netpoll: netconsole: device eth0 not up yet, forcing it
8139too 0000:00:0f.0 eth0: link up, 100Mbps, full-duplex, lpa 0xC5E1
netpoll: netconsole: carrier detect appears untrustworthy, waiting 4 seconds

================================
WARNING: inconsistent lock state
5.11.0-rc6-Pentium4 #4 Not tainted
--------------------------------
inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
c1081800 (&syncp->seq#2){?.-.}-{0:0}, at: rtl8139_poll+0x24b/0x34a
{IN-HARDIRQ-W} state was registered at:
  lock_acquire+0x236/0x2b4
  do_write_seqcount_begin_nested.constprop.0+0x1a/0x1f
  rtl8139_interrupt+0x346/0x3cb
  __handle_irq_event_percpu+0xe5/0x20c
  handle_irq_event_percpu+0x17/0x3d
  handle_irq_event+0x29/0x42
  handle_fasteoi_irq+0x67/0xd7
  __handle_irq+0x7d/0x9c
  common_interrupt+0x7b/0xe5
  asm_common_interrupt+0x106/0x180
  _raw_spin_unlock_irqrestore+0x28/0x33
  __mod_timer+0x1cd/0x1d8
  mod_timer+0xa/0xc
  mld_ifc_start_timer+0x24/0x37
  mld_ifc_timer_expire+0x1b0/0x1c0
  call_timer_fn+0xfe/0x201
  __run_timers+0x134/0x159
  run_timer_softirq+0x14/0x27
  __do_softirq+0x15f/0x307
  call_on_stack+0x40/0x46
  do_softirq_own_stack+0x1c/0x1e
  __irq_exit_rcu+0x4f/0x85
  irq_exit_rcu+0x8/0x11
  sysvec_apic_timer_interrupt+0x3e/0x4b
  handle_exception_return+0x0/0xaf
  default_idle+0xa/0xc
  arch_cpu_idle+0xd/0xf
  default_idle_call+0x48/0x74
  do_idle+0xb7/0x1c3
  cpu_startup_entry+0x19/0x1b
  rest_init+0x11d/0x120
  arch_call_rest_init+0x8/0xb
  start_kernel+0x412/0x420
  i386_start_kernel+0x43/0x45
  startup_32_smp+0x164/0x168
irq event stamp: 8782
hardirqs last  enabled at (8782): [<dd8929e2>] net_rx_action+0x75/0x250
hardirqs last disabled at (8781): [<dd8929bf>] net_rx_action+0x52/0x250
softirqs last  enabled at (8772): [<dd99221f>] __do_softirq+0x2d7/0x307
softirqs last disabled at (8779): [<dd40fc2e>] call_on_stack+0x40/0x46

other info that might help us debug this:
 Possible unsafe locking scenario:
       CPU0
       ----
  lock(&syncp->seq#2);
  <Interrupt>
    lock(&syncp->seq#2);

 *** DEADLOCK ***
1 lock held by swapper/0/0:
 #0: c10818a0 (&tp->rx_lock){+.-.}-{2:2}, at: rtl8139_poll+0x31/0x34a

stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.11.0-rc6-Pentium4 #4
Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Call Trace:
 <SOFTIRQ>
 dump_stack+0x6b/0x89
 print_usage_bug+0x17d/0x188
 mark_lock.part.0+0xf8/0x272
 ? check_chain_key+0xea/0x142
 __lock_acquire+0x459/0x147f
 ? rcu_read_lock_sched_held+0x23/0x4a
 ? trace_kmalloc+0x8c/0xb9
 ? __kmalloc_track_caller+0x113/0x126
 lock_acquire+0x236/0x2b4
 ? rtl8139_poll+0x24b/0x34a
 ? ksize+0xd/0x12
 ? __alloc_skb+0x84/0x133
 do_write_seqcount_begin_nested.constprop.0+0x1a/0x1f
 ? rtl8139_poll+0x24b/0x34a
 rtl8139_poll+0x24b/0x34a
 net_rx_action+0xd2/0x250
 __do_softirq+0x15f/0x307
 ? __entry_text_end+0x5/0x5
 call_on_stack+0x40/0x46
 </SOFTIRQ>
 ? __irq_exit_rcu+0x4f/0x85
 ? irq_exit_rcu+0x8/0x11
 ? common_interrupt+0xd3/0xe5
 ? asm_common_interrupt+0x106/0x180
 ? ldsem_down_write+0x1f/0x1f
 ? default_idle+0xa/0xc
 ? schedule_timeout+0x41/0x97
 ? default_idle+0xa/0xc
 ? arch_cpu_idle+0xd/0xf
 ? default_idle_call+0x48/0x74
 ? do_idle+0xb7/0x1c3
 ? cpu_startup_entry+0x19/0x1b
 ? rest_init+0x11d/0x120
 ? arch_call_rest_init+0x8/0xb
 ? start_kernel+0x412/0x420
 ? i386_start_kernel+0x43/0x45
 ? startup_32_smp+0x164/0x168
random: fast init done
printk: console [netcon0] enabled
netconsole: network logging started
[...]

 # lspci 
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 651 Host (rev 02)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS962 [MuTIOL Media IO] LPC Controller (rev 14)
00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2/3 SMBus controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 IDE Controller
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 AC'97 Sound Controller (rev a0)
00:03.0 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.1 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.2 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.3 USB controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:0a.0 Network controller: Ralink corp. RT2500 Wireless 802.11bg (rev 01)
00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter (rev 10)
00:10.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev 46)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350 [Radeon 9550/9600/X1050 Series]
01:00.1 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350 [Radeon 9550/9600/X1050 Series] (Secondary)

 # LC_ALL=C lscpu 
Architecture:                    i686
CPU op-mode(s):                  32-bit
Byte Order:                      Little Endian
Address sizes:                   36 bits physical, 32 bits virtual
CPU(s):                          1
On-line CPU(s) list:             0
Thread(s) per core:              1
Core(s) per socket:              1
Socket(s):                       1
Vendor ID:                       GenuineIntel
CPU family:                      15
Model:                           2
Model name:                      Intel(R) Pentium(R) 4 CPU 3.06GHz
Stepping:                        7
CPU MHz:                         3062.724
BogoMIPS:                        6127.67
Vulnerability Itlb multihit:     Processor vulnerable
Vulnerability L1tf:              Vulnerable
Vulnerability Mds:               Vulnerable: Clear CPU buffers attempted, no microcode; SMT disabled
Vulnerability Meltdown:          Vulnerable
Vulnerability Spec store bypass: Vulnerable
Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:        Mitigation; Full generic retpoline, STIBP disabled, RSB filling
Vulnerability Srbds:             Not affected
Vulnerability Tsx async abort:   Not affected
Flags:                           fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cpuid cid xtpr
Comment 1 Erhard F. 2021-02-05 09:22:24 UTC 
Created attachment 295073 [details]
kernel .config (kernel 5.11-rc6, Shuttle XPC FS51, Pentium 4)
Comment 2 Erhard F. 2021-03-02 13:32:16 UTC 
Created attachment 295579 [details]
dmesg (kernel 5.12-rc1, Shuttle XPC FS51, Pentium 4)

Same for 5.12-rc1.

================================
WARNING: inconsistent lock state
5.12.0-rc1-Pentium4 #2 Not tainted
--------------------------------
inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
c113c804 (&syncp->seq#2){?.-.}-{0:0}, at: rtl8139_poll+0x251/0x350
{IN-HARDIRQ-W} state was registered at:
  lock_acquire+0x239/0x2c5
  do_write_seqcount_begin_nested.constprop.0+0x1a/0x1f
  rtl8139_interrupt+0x346/0x3cb
  __handle_irq_event_percpu+0xe5/0x20c
  handle_irq_event_percpu+0x17/0x3d
  handle_irq_event+0x29/0x42
  handle_fasteoi_irq+0x67/0xd7
  __handle_irq+0x7d/0x9c
  __common_interrupt+0x68/0xc3
  common_interrupt+0x22/0x35
  asm_common_interrupt+0x106/0x180
  _raw_spin_unlock_irqrestore+0x41/0x45
  __mod_timer+0x1cd/0x1d8
  mod_timer+0xa/0xc
  mld_ifc_start_timer+0x24/0x37
  mld_ifc_timer_expire+0x1b0/0x1c0
  call_timer_fn+0xfe/0x201
  __run_timers+0x134/0x159
  run_timer_softirq+0x14/0x27
  __do_softirq+0x15f/0x307
  call_on_stack+0x40/0x46
  do_softirq_own_stack+0x1c/0x1e
  __irq_exit_rcu+0x4f/0x85
  irq_exit_rcu+0x8/0x11
  sysvec_apic_timer_interrupt+0x20/0x2e
  handle_exception_return+0x0/0xaf
  default_idle+0xa/0xc
  arch_cpu_idle+0xd/0xf
  default_idle_call+0x48/0x74
  do_idle+0xb7/0x1c3
  cpu_startup_entry+0x19/0x1b
  rest_init+0x11d/0x120
  arch_call_rest_init+0x8/0xb
  start_kernel+0x417/0x425
  i386_start_kernel+0x43/0x45
  startup_32_smp+0x164/0x168
irq event stamp: 26328
hardirqs last  enabled at (26328): [<c4362e64>] __slab_alloc.constprop.0+0x3e/0x59
hardirqs last disabled at (26327): [<c4362e47>] __slab_alloc.constprop.0+0x21/0x59
softirqs last  enabled at (26314): [<c4789f1f>] __do_softirq+0x2d7/0x307
softirqs last disabled at (26321): [<c420fecb>] call_on_stack+0x40/0x46

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&syncp->seq#2);
  <Interrupt>
    lock(&syncp->seq#2);

 *** DEADLOCK ***

1 lock held by swapper/0/0:
 #0: c113c8a4 (&tp->rx_lock){+.-.}-{2:2}, at: rtl8139_poll+0x31/0x350

stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.12.0-rc1-Pentium4 #2
Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Call Trace:
 <SOFTIRQ>
 dump_stack+0x78/0xa5
 print_usage_bug+0x17d/0x188
 mark_lock.part.0+0xfd/0x27a
 ? hlock_class+0x18/0x58
 ? mark_lock.part.0+0x33/0x27a
 ? ___slab_alloc.constprop.0+0x2b7/0x2d1
 __lock_acquire+0x458/0x1488
 ? rcu_read_lock_sched_held+0x23/0x4a
 ? trace_kmalloc+0x8c/0xb9
 ? __kmalloc_track_caller+0x130/0x143
 lock_acquire+0x239/0x2c5
 ? rtl8139_poll+0x251/0x350
 ? __alloc_skb+0xb7/0x102
 do_write_seqcount_begin_nested.constprop.0+0x1a/0x1f
 ? rtl8139_poll+0x251/0x350
 rtl8139_poll+0x251/0x350
 __napi_poll+0x24/0xf1
 net_rx_action+0xbb/0x177
 __do_softirq+0x15f/0x307
 ? __entry_text_end+0x5/0x5
 call_on_stack+0x40/0x46
 </SOFTIRQ>
 ? __irq_exit_rcu+0x4f/0x85
 ? irq_exit_rcu+0x8/0x11
 ? common_interrupt+0x27/0x35
 ? asm_common_interrupt+0x106/0x180
 ? ldsem_down_write+0x1f/0x1f
 ? newidle_balance+0x1d0/0x3ab
 ? default_idle+0xa/0xc
 ? __pci_setup_bridge+0x4e/0x64
 ? default_idle+0xa/0xc
 ? arch_cpu_idle+0xd/0xf
 ? default_idle_call+0x48/0x74
 ? do_idle+0xb7/0x1c3
 ? cpu_startup_entry+0x19/0x1b
 ? rest_init+0x11d/0x120
 ? arch_call_rest_init+0x8/0xb
 ? start_kernel+0x417/0x425
 ? i386_start_kernel+0x43/0x45
 ? startup_32_smp+0x164/0x168
Comment 3 Jakub Kicinski 2021-03-02 23:52:26 UTC 
Thank you for the report!

Are you able to apply patches and build the kernel to test?

I think this would be the fix:

diff --git a/drivers/net/ethernet/realtek/8139too.c b/drivers/net/ethernet/realtek/8139too.c
index 1e5a453dea14..e5c333eacc11 100644
--- a/drivers/net/ethernet/realtek/8139too.c
+++ b/drivers/net/ethernet/realtek/8139too.c
@@ -2222,9 +2222,12 @@ static void rtl8139_poll_controller(struct net_device *dev)
 {
        struct rtl8139_private *tp = netdev_priv(dev);
        const int irq = tp->pci_dev->irq;
+       unsigned long flags;
 
        disable_irq_nosync(irq);
+       local_irq_save(flags);
        rtl8139_interrupt(irq, dev);
+       local_irq_restore(flags);
        enable_irq(irq);
 }
 #endif
Comment 4 Erhard F. 2021-03-03 19:17:11 UTC 
With the patch applied I still get almost the same backtrace:

[...]
================================
WARNING: inconsistent lock state
5.12.0-rc1-Pentium4+ #3 Not tainted
--------------------------------
inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
c113c804 (&syncp->seq#2){?.-.}-{0:0}, at: rtl8139_poll+0x251/0x350
{IN-HARDIRQ-W} state was registered at:
  lock_acquire+0x239/0x2c5
  do_write_seqcount_begin_nested.constprop.0+0x1a/0x1f
  rtl8139_interrupt+0x346/0x3cb
  __handle_irq_event_percpu+0xe5/0x20c
  handle_irq_event_percpu+0x17/0x3d
  handle_irq_event+0x29/0x42
  handle_fasteoi_irq+0x67/0xd7
  __handle_irq+0x7d/0x9c
  __common_interrupt+0x68/0xc3
  common_interrupt+0x22/0x35
  asm_common_interrupt+0x106/0x180
  _raw_spin_unlock_irqrestore+0x41/0x45
  __mod_timer+0x1cd/0x1d8
  mod_timer+0xa/0xc
  mld_ifc_start_timer+0x24/0x37
  mld_ifc_timer_expire+0x1b0/0x1c0
  call_timer_fn+0xfe/0x201
  __run_timers+0x134/0x159
  run_timer_softirq+0x14/0x27
  __do_softirq+0x15f/0x307
  call_on_stack+0x40/0x46
  do_softirq_own_stack+0x1c/0x1e
  __irq_exit_rcu+0x4f/0x85
  irq_exit_rcu+0x8/0x11
  sysvec_apic_timer_interrupt+0x20/0x2e
  handle_exception_return+0x0/0xaf
  default_idle+0xa/0xc
  arch_cpu_idle+0xd/0xf
  default_idle_call+0x48/0x74
  do_idle+0xb7/0x1c3
  cpu_startup_entry+0x19/0x1b
  rest_init+0x11d/0x120
  arch_call_rest_init+0x8/0xb
  start_kernel+0x417/0x425
  i386_start_kernel+0x43/0x45
  startup_32_smp+0x164/0x168
irq event stamp: 23566
hardirqs last  enabled at (23566): [<dad62e64>] __slab_alloc.constprop.0+0x3e/0x59
hardirqs last disabled at (23565): [<dad62e47>] __slab_alloc.constprop.0+0x21/0x59
softirqs last  enabled at (23552): [<db189f1f>] __do_softirq+0x2d7/0x307
softirqs last disabled at (23559): [<dac0fecb>] call_on_stack+0x40/0x46

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&syncp->seq#2);
  <Interrupt>
    lock(&syncp->seq#2);

 *** DEADLOCK ***

1 lock held by swapper/0/0:
 #0: c113c8a4 (&tp->rx_lock){+.-.}-{2:2}, at: rtl8139_poll+0x31/0x350

stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.12.0-rc1-Pentium4+ #3
Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Call Trace:
 <SOFTIRQ>
 dump_stack+0x78/0xa5
 print_usage_bug+0x17d/0x188
 mark_lock.part.0+0xfd/0x27a
 ? hlock_class+0x18/0x58
 ? mark_lock.part.0+0x33/0x27a
 ? ___slab_alloc.constprop.0+0x2b7/0x2d1
 __lock_acquire+0x458/0x1488
 ? rcu_read_lock_sched_held+0x23/0x4a
 ? trace_kmalloc+0x8c/0xb9
 ? __kmalloc_track_caller+0x130/0x143
 lock_acquire+0x239/0x2c5
 ? rtl8139_poll+0x251/0x350
 ? __alloc_skb+0xb7/0x102
 do_write_seqcount_begin_nested.constprop.0+0x1a/0x1f
 ? rtl8139_poll+0x251/0x350
 rtl8139_poll+0x251/0x350
 __napi_poll+0x24/0xf1
 net_rx_action+0xbb/0x177
 __do_softirq+0x15f/0x307
 ? __entry_text_end+0x5/0x5
 call_on_stack+0x40/0x46
 </SOFTIRQ>
 ? __irq_exit_rcu+0x4f/0x85
 ? irq_exit_rcu+0x8/0x11
 ? common_interrupt+0x27/0x35
 ? asm_common_interrupt+0x106/0x180
 ? ldsem_down_write+0x1f/0x1f
 ? pci_subsys_init+0x41/0x5c
 ? default_idle+0xa/0xc
 ? __pci_setup_bridge+0x25/0x64
 ? default_idle+0xa/0xc
 ? arch_cpu_idle+0xd/0xf
 ? default_idle_call+0x48/0x74
 ? do_idle+0xb7/0x1c3
 ? cpu_startup_entry+0x19/0x1b
 ? rest_init+0x11d/0x120
 ? arch_call_rest_init+0x8/0xb
 ? start_kernel+0x417/0x425
 ? i386_start_kernel+0x43/0x45
 ? startup_32_smp+0x164/0x168
Comment 5 Jakub Kicinski 2021-03-03 23:16:55 UTC 
Strange, I don't see the same syncp being taken both in RX and TX paths.

Would you be able to translate the offsets into lines of code?

For common builds you'd need to do something like:

./scripts/decode_stacktrace.sh vmlinux ./ ./

And then paste in the stack trace. The script will respond with line numbers.

In particular I wonder what's at:

 rtl8139_poll+0x251/0x350

and:

 rtl8139_interrupt+0x346/0x3cb
Comment 6 Erhard F. 2021-03-04 00:17:46 UTC 
Pasted the stuff after "{IN-HARDIRQ-W} state was registered at:" from v5.12-rc1 + patch and got:

lock_acquire (/usr/src/linux-stable/kernel/locking/lockdep.c:437)
  startup_32_smp+0x164/0x168lock_acquire (/usr/src/linux-stable/kernel/locking/lockdep.c:437) 
do_write_seqcount_begin_nested.constprop.0 (/usr/src/linux-stable/./include/linux/seqlock.h:520) 
rtl8139_interrupt (/usr/src/linux-stable/drivers/net/ethernet/realtek/8139too.c:1806) 
__handle_irq_event_percpu (/usr/src/linux-stable/kernel/irq/handle.c:156) 
handle_irq_event_percpu (/usr/src/linux-stable/kernel/irq/handle.c:196) 
handle_irq_event (/usr/src/linux-stable/kernel/irq/handle.c:213) 
handle_fasteoi_irq (/usr/src/linux-stable/kernel/irq/chip.c:662) 
__handle_irq (/usr/src/linux-stable/arch/x86/kernel/irq_32.c:100) 
__common_interrupt (/usr/src/linux-stable/arch/x86/kernel/irq.c:234) 
common_interrupt (/usr/src/linux-stable/arch/x86/kernel/irq.c:240) 
asm_common_interrupt (/usr/src/linux-stable/./arch/x86/include/asm/idtentry.h:623) 
_raw_spin_unlock_irqrestore (/usr/src/linux-stable/kernel/locking/spinlock.c:192) 
__mod_timer (/usr/src/linux-stable/kernel/time/timer.c:1066) 
mod_timer (/usr/src/linux-stable/kernel/time/timer.c:1107) 
mld_ifc_start_timer (/usr/src/linux-stable/net/ipv6/mcast.c:1050) 
mld_ifc_timer_expire (/usr/src/linux-stable/net/ipv6/mcast.c:2481) 
call_timer_fn (/usr/src/linux-stable/./arch/x86/include/asm/jump_label.h:25) 
__run_timers (/usr/src/linux-stable/kernel/time/timer.c:1477) 
run_timer_softirq (/usr/src/linux-stable/kernel/time/timer.c:1760) 
__do_softirq (/usr/src/linux-stable/./arch/x86/include/asm/jump_label.h:25) 
call_on_stack (/usr/src/linux-stable/arch/x86/kernel/irq_32.c:60) 
do_softirq_own_stack (/usr/src/linux-stable/arch/x86/kernel/irq_32.c:150) 
__irq_exit_rcu (/usr/src/linux-stable/kernel/softirq.c:228) 
irq_exit_rcu (/usr/src/linux-stable/kernel/softirq.c:436) 
sysvec_apic_timer_interrupt (/usr/src/linux-stable/arch/x86/kernel/apic/apic.c:1100) 
handle_exception_return (/usr/src/linux-stable/arch/x86/entry/entry_32.S:1179) 
default_idle (/usr/src/linux-stable/arch/x86/kernel/process.c:689) 
arch_cpu_idle (/usr/src/linux-stable/arch/x86/kernel/process.c:681) 
default_idle_call (/usr/src/linux-stable/./arch/x86/include/asm/irqflags.h:40) 
do_idle (/usr/src/linux-stable/kernel/sched/idle.c:195) 
cpu_startup_entry (/usr/src/linux-stable/kernel/sched/idle.c:396 (discriminator 1)) 
rest_init (/usr/src/linux-stable/init/main.c:722) 
arch_call_rest_init+0x8/0xb 
start_kernel (/usr/src/linux-stable/init/main.c:1066) 
i386_start_kernel (/usr/src/linux-stable/arch/x86/kernel/head32.c:57)

Pasted the stuff after "Call Trace: <SOFTIRQ>" from v5.12-rc1 + patch and got:

dump_stack (/usr/src/linux-stable/lib/dump_stack.c:122) 
print_usage_bug (/usr/src/linux-stable/kernel/locking/lockdep.c:3806) 
mark_lock.part.0 (/usr/src/linux-stable/kernel/locking/lockdep.c:3818) 
? hlock_class (/usr/src/linux-stable/kernel/locking/lockdep.c:198) 
? mark_lock.part.0 (/usr/src/linux-stable/kernel/locking/lockdep.c:4456) 
? ___slab_alloc.constprop.0 (/usr/src/linux-stable/mm/slub.c:2767) 
__lock_acquire (/usr/src/linux-stable/kernel/locking/lockdep.c:4387) 
? rcu_read_lock_sched_held (/usr/src/linux-stable/./include/linux/lockdep.h:278) 
? trace_kmalloc (/usr/src/linux-stable/./include/trace/events/kmem.h:46) 
? __kmalloc_track_caller (/usr/src/linux-stable/mm/slub.c:4566) 
lock_acquire (/usr/src/linux-stable/kernel/locking/lockdep.c:437) 
? rtl8139_poll (/usr/src/linux-stable/drivers/net/ethernet/realtek/8139too.c:2051) 
? __alloc_skb (/usr/src/linux-stable/net/core/skbuff.c:441) 
do_write_seqcount_begin_nested.constprop.0 (/usr/src/linux-stable/./include/linux/seqlock.h:520) 
? rtl8139_poll (/usr/src/linux-stable/drivers/net/ethernet/realtek/8139too.c:2051) 
rtl8139_poll (/usr/src/linux-stable/drivers/net/ethernet/realtek/8139too.c:2051) 
__napi_poll (/usr/src/linux-stable/net/core/dev.c:6892) 
net_rx_action (/usr/src/linux-stable/net/core/dev.c:6959) 
__do_softirq (/usr/src/linux-stable/./arch/x86/include/asm/jump_label.h:25) 
? __entry_text_end (/usr/src/linux-stable/kernel/softirq.c:303) 
call_on_stack (/usr/src/linux-stable/arch/x86/kernel/irq_32.c:60) 
</SOFTIRQ>
? __irq_exit_rcu (/usr/src/linux-stable/kernel/softirq.c:228) 
? irq_exit_rcu (/usr/src/linux-stable/kernel/softirq.c:436) 
? common_interrupt (/usr/src/linux-stable/arch/x86/kernel/irq.c:240) 
? asm_common_interrupt (/usr/src/linux-stable/./arch/x86/include/asm/idtentry.h:623) 
? ldsem_down_write (/usr/src/linux-stable/arch/x86/kernel/process.c:687) 
? pci_subsys_init (/usr/src/linux-stable/arch/x86/pci/legacy.c:23) 
? default_idle (/usr/src/linux-stable/arch/x86/kernel/process.c:689) 
? __pci_setup_bridge (/usr/src/linux-stable/drivers/pci/setup-bus.c:672) 
? default_idle (/usr/src/linux-stable/arch/x86/kernel/process.c:689) 
? arch_cpu_idle (/usr/src/linux-stable/arch/x86/kernel/process.c:681) 
? default_idle_call (/usr/src/linux-stable/./arch/x86/include/asm/irqflags.h:40) 
? do_idle (/usr/src/linux-stable/kernel/sched/idle.c:195) 
? cpu_startup_entry (/usr/src/linux-stable/kernel/sched/idle.c:396 (discriminator 1)) 
? rest_init (/usr/src/linux-stable/init/main.c:722) 
? arch_call_rest_init+0x8/0xb 
? start_kernel (/usr/src/linux-stable/init/main.c:1066) 
? i386_start_kernel (/usr/src/linux-stable/arch/x86/kernel/head32.c:57)
Comment 7 Erhard F. 2021-03-04 00:20:15 UTC 
Probably bug #208097 is relevant too? Same machine, also IRQ related problems.
Comment 8 Jakub Kicinski 2021-03-04 00:37:05 UTC 
Makes no sense, these are separate locks, let me ask Ahmed on the mailing list.
Comment 9 Erhard F. 2021-05-05 14:52:20 UTC 
Created attachment 296653 [details]
dmesg (kernel 5.12.1, Shuttle XPC FS51, Pentium 4)

Looks like 5.12.x is still affected. Though the trace looks a bit different compared to 5.11-rc6 and 5.12-rc1:

[...]
printk: console [netcon0] enabled

================================
WARNING: inconsistent lock state
5.12.1-gentoo-Pentium4 #2 Not tainted
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
c108c8a4 (&tp->rx_lock){?.-.}-{2:2}, at: rtl8139_poll+0x31/0x350
{HARDIRQ-ON-W} state was registered at:
  lock_acquire+0x239/0x2c5
  _raw_spin_lock+0x22/0x31
  rtl8139_poll+0x31/0x350
  __napi_poll+0x24/0xf1
  net_rx_action+0xbb/0x177
  __do_softirq+0x15f/0x307
  call_on_stack+0x40/0x46
  do_softirq_own_stack+0x1c/0x1e
  __irq_exit_rcu+0x4f/0x85
  irq_exit_rcu+0x8/0x11
  common_interrupt+0x27/0x35
  asm_common_interrupt+0x106/0x180
  default_idle+0xa/0xc
  arch_cpu_idle+0xd/0xf
  default_idle_call+0x48/0x74
  do_idle+0xb7/0x1c3
  cpu_startup_entry+0x19/0x1b
  rest_init+0x11d/0x120
  arch_call_rest_init+0x8/0xb
  start_kernel+0x417/0x425
  i386_start_kernel+0x43/0x45
  startup_32_smp+0x164/0x168
irq event stamp: 23068
hardirqs last  enabled at (23067): [<ced8c8c8>] default_idle_call+0x39/0x74
hardirqs last disabled at (23068): [<ced86781>] common_interrupt+0xf/0x35
softirqs last  enabled at (22798): [<ced8e59f>] __do_softirq+0x2d7/0x307
softirqs last disabled at (22785): [<ce80fee0>] call_on_stack+0x40/0x46

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&tp->rx_lock);
  <Interrupt>
    lock(&tp->rx_lock);

 *** DEADLOCK ***

3 locks held by swapper/0/0:
 #0: cf038eb4 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x192/0x1cc
 #1: cf006dc4 (console_owner){-...}-{0:0}, at: console_unlock+0x260/0x475
 #2: cf09b6f0 (target_list_lock){-...}-{2:2}, at: write_msg+0x37/0xa5

stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.12.1-gentoo-Pentium4 #2
Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Call Trace:
 <IRQ>
 dump_stack+0x78/0xa5
 print_usage_bug+0x17d/0x188
 mark_lock.part.0+0xfd/0x27a
 ? mark_lock.part.0+0x33/0x27a
 ? check_chain_key+0xea/0x142
 __lock_acquire+0x3fb/0x1488
 ? __lock_acquire+0x9f6/0x1488
 ? __lock_acquire+0x9f6/0x1488
 lock_acquire+0x239/0x2c5
 ? rtl8139_poll+0x31/0x350
 ? check_chain_key+0xea/0x142
 _raw_spin_lock+0x22/0x31
 ? rtl8139_poll+0x31/0x350
 rtl8139_poll+0x31/0x350
 ? enable_irq+0x45/0x53
 netpoll_poll_dev+0xd7/0x1c1
 netpoll_send_skb+0x12d/0x256
 netpoll_send_udp+0x384/0x38c
 write_msg+0x87/0xa5
 ? netconsole_netdev_event+0x13f/0x13f
 console_unlock+0x38a/0x475
 vprintk_emit+0x1b6/0x1cc
 vprintk_default+0x10/0x12
 vprintk_func+0x96/0xa1
 printk+0xe/0x10
 crng_fast_load+0xdf/0xea
 add_interrupt_randomness+0xec/0x14a
 handle_irq_event_percpu+0x24/0x3d
 handle_irq_event+0x29/0x42
 handle_fasteoi_irq+0x67/0xd7
 ? handle_level_irq+0x83/0x83
 __handle_irq+0x7d/0x9c
 </IRQ>
 __common_interrupt+0x68/0xc3
 common_interrupt+0x22/0x35
 asm_common_interrupt+0x106/0x180
EIP: default_idle+0xa/0xc
Code: 51 89 c3 89 55 f8 e8 60 de ff ff 8b 4d f8 31 d2 89 d8 e8 e2 a1 e7 ff 5b 5b 5d c3 cc cc cc cc cc 55 89 e5 e8 cc 7e a8 ff fb f4 <5d> c3 55 89 e5 64 a1 d4 97 14 cf f0 80 48 02 20 8b 10 80 e2 08 75
EAX: ced8c720 EBX: 00000000 ECX: 00000000 EDX: ffffffff
ESI: ceff2800 EDI: 00000000 EBP: cefebf2c ESP: cefebf2c
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00200202
 ? __sched_text_end+0x5/0x5
 ? print_irq_lock_scenario.isra.0+0x7a/0x10c
 ? default_idle+0xa/0xc
 arch_cpu_idle+0xd/0xf
 default_idle_call+0x48/0x74
 do_idle+0xb7/0x1c3
 cpu_startup_entry+0x19/0x1b
 rest_init+0x11d/0x120
 arch_call_rest_init+0x8/0xb
 start_kernel+0x417/0x425
 i386_start_kernel+0x43/0x45
 startup_32_smp+0x164/0x168
netconsole: network logging started
[...]
Comment 10 Erhard F. 2021-05-05 14:57:40 UTC 
Created attachment 296655 [details]
kernel .config (kernel 5.12.1, Shuttle XPC FS51, Pentium 4)
Comment 11 Erhard F. 2021-07-19 17:50:14 UTC 
Created attachment 297931 [details]
dmesg (kernel 5.14-rc2, Shuttle XPC FS51, Pentium 4)

Looks like it's still in... kernel v5.14-rc2:

[...]
printk: console [netcon0] enabled

================================
WARNING: inconsistent lock state
5.14.0-rc2-Pentium4 #5 Not tainted
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
c10ac8a4 (&tp->rx_lock){?.-.}-{2:2}, at: rtl8139_poll+0x31/0x350
{HARDIRQ-ON-W} state was registered at:
  lock_acquire+0x1f2/0x22a
  _raw_spin_lock+0x22/0x31
  rtl8139_poll+0x31/0x350
  __napi_poll+0x24/0xf1
  net_rx_action+0x118/0x28a
  __do_softirq+0x155/0x2f3
  call_on_stack+0x40/0x46
  do_softirq_own_stack+0x1c/0x1e
  __irq_exit_rcu+0x59/0x8f
  irq_exit_rcu+0x8/0x11
  common_interrupt+0x27/0x35
  asm_common_interrupt+0xff/0x180
  default_idle+0xa/0xc
  arch_cpu_idle+0xd/0xf
  default_idle_call+0x48/0x74
  do_idle+0xbe/0x1ca
  cpu_startup_entry+0x19/0x1b
  rest_init+0x121/0x124
  arch_call_rest_init+0x11/0x45
  start_kernel+0x6b3/0x6d1
  i386_start_kernel+0x5d/0x73
  startup_32_smp+0x161/0x164
irq event stamp: 14738
hardirqs last  enabled at (14737): [<de353855>] default_idle_call+0x39/0x74
hardirqs last disabled at (14738): [<de34c6ea>] common_interrupt+0xf/0x35
softirqs last  enabled at (13838): [<de3554e3>] __do_softirq+0x2c3/0x2f3
softirqs last disabled at (13827): [<dde10de7>] call_on_stack+0x40/0x46

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&tp->rx_lock);
  <Interrupt>
    lock(&tp->rx_lock);

 *** DEADLOCK ***

3 locks held by swapper/0/0:
 #0: de5f17d4 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x192/0x1cc
 #1: de5bf6a4 (console_owner){-...}-{0:0}, at: console_unlock+0x251/0x441
 #2: de644850 (target_list_lock){-...}-{2:2}, at: write_msg+0x37/0xa5

stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.14.0-rc2-Pentium4 #5
Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Call Trace:
 <IRQ>
 dump_stack_lvl+0x53/0x76
 dump_stack+0xd/0x10
 print_usage_bug+0x17d/0x188
 mark_lock.part.0+0xfd/0x27a
 ? mark_lock.part.0+0x33/0x27a
 ? check_chain_key+0xea/0x142
 __lock_acquire+0x404/0x14a6
 ? __lock_acquire+0xa03/0x14a6
 ? __lock_acquire+0xa03/0x14a6
 ? rtl8139_poll+0x31/0x350
 lock_acquire+0x1f2/0x22a
 ? rtl8139_poll+0x31/0x350
 ? check_chain_key+0xea/0x142
 _raw_spin_lock+0x22/0x31
 ? rtl8139_poll+0x31/0x350
 rtl8139_poll+0x31/0x350
 ? enable_irq+0x45/0x53
 netpoll_poll_dev+0xd7/0x1c1
 netpoll_send_skb+0x12d/0x256
 netpoll_send_udp+0x384/0x38c
 write_msg+0x87/0xa5
 ? netconsole_netdev_event+0x13f/0x13f
 console_unlock+0x37b/0x441
 vprintk_emit+0x1b6/0x1cc
 vprintk_default+0x10/0x12
 vprintk+0xbf/0xcb
 printk+0xf/0x11
 crng_fast_load+0xdf/0xea
 add_interrupt_randomness+0x157/0x20a
 handle_irq_event_percpu+0x24/0x3a
 handle_irq_event+0x29/0x42
 handle_fasteoi_irq+0x67/0xd7
 ? handle_level_irq+0x83/0x83
 __handle_irq+0x7d/0x9c
 </IRQ>
 __common_interrupt+0x68/0xc3
 common_interrupt+0x22/0x35
 asm_common_interrupt+0xff/0x180
EIP: default_idle+0xa/0xc
Code: e5 53 51 89 c3 89 55 f8 e8 31 d2 ff ff 8b 4d f8 31 d2 89 d8 e8 b5 b9 e6 ff 5b 5b 5d c3 cc cc cc 55 89 e5 e8 60 1f ac ff fb f4 <5d> c3 55 89 e5 64 a1 d8 c7 70 de f0 80 48 02 20 8b 10 80 e2 08 75
EAX: de3536b0 EBX: 00000000 ECX: 00000000 EDX: ffffffff
ESI: de5aa800 EDI: 00000000 EBP: de5a3f1c ESP: de5a3f1c
DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00200202
 ? __sched_text_end+0x3/0x3
 ? __schedule+0x390/0xb0e
 ? default_idle+0xa/0xc
 arch_cpu_idle+0xd/0xf
 default_idle_call+0x48/0x74
 do_idle+0xbe/0x1ca
 cpu_startup_entry+0x19/0x1b
 rest_init+0x121/0x124
 arch_call_rest_init+0x11/0x45
 start_kernel+0x6b3/0x6d1
 i386_start_kernel+0x5d/0x73
 startup_32_smp+0x161/0x164
netconsole: network logging started
Comment 12 Erhard F. 2021-07-19 17:57:21 UTC 
Created attachment 297933 [details]
kernel .config (kernel 5.14-rc2, Shuttle XPC FS51, Pentium 4)
Comment 13 Erhard F. 2021-10-18 15:47:48 UTC 
Created attachment 299247 [details]
dmesg (kernel 5.15-rc6, Shuttle XPC FS51, Pentium 4)

[...]
printk: console [netcon0] enabled

================================
WARNING: inconsistent lock state
5.15.0-rc6-Pentium4 #2 Not tainted
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
c12298a4 (&tp->rx_lock){?.-.}-{2:2}, at: rtl8139_poll+0x31/0x34e
{HARDIRQ-ON-W} state was registered at:
  lock_acquire+0x1f2/0x230
  _raw_spin_lock+0x22/0x37
  rtl8139_poll+0x31/0x34e
  __napi_poll.constprop.0+0x24/0xf5
  net_rx_action+0x118/0x28c
  __do_softirq+0x155/0x2f9
  call_on_stack+0x40/0x4c
  do_softirq_own_stack+0x1c/0x22
  __irq_exit_rcu+0x57/0x8f
  irq_exit_rcu+0x8/0x11
  common_interrupt+0x27/0x39
  asm_common_interrupt+0xff/0x180
  default_idle+0xa/0xc
  arch_cpu_idle+0xd/0x11
  default_idle_call+0x48/0x78
  do_idle+0xbe/0x1d0
  cpu_startup_entry+0x19/0x1b
  rest_init+0x121/0x12a
  arch_call_rest_init+0x11/0x4b
  start_kernel+0x6a2/0x6c6
  i386_start_kernel+0x5d/0x75
  startup_32_smp+0x161/0x164
irq event stamp: 35934
hardirqs last  enabled at (35933): [<d59e1054>] default_idle_call+0x39/0x78
hardirqs last disabled at (35934): [<d59d9bad>] common_interrupt+0xf/0x39
softirqs last  enabled at (35832): [<d59e2d63>] __do_softirq+0x2c3/0x2f9
softirqs last disabled at (35821): [<d5411715>] call_on_stack+0x40/0x4c

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&tp->rx_lock);
  <Interrupt>
    lock(&tp->rx_lock);

 *** DEADLOCK ***

3 locks held by swapper/0/0:
 #0: d5ca38dc (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x15e/0x19c
 #1: d5c71784 (console_owner){-...}-{0:0}, at: console_unlock+0x1c5/0x400
 #2: d5d07530 (target_list_lock){-...}-{2:2}, at: write_msg+0x37/0xa7

stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.0-rc6-Pentium4 #2
Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Call Trace:
 <IRQ>
 dump_stack_lvl+0x53/0x7c
 dump_stack+0xd/0x12
 print_usage_bug+0x17d/0x18e
 mark_lock.part.0+0xfb/0x27c
 ? mark_lock.part.0+0x33/0x27c
 ? check_chain_key+0xea/0x148
 __lock_acquire+0x400/0x1472
 ? __lock_acquire+0x9ee/0x1472
 ? __lock_acquire+0x9ee/0x1472
 ? rtl8139_poll+0x31/0x34e
 lock_acquire+0x1f2/0x230
 ? rtl8139_poll+0x31/0x34e
 ? check_chain_key+0xea/0x148
 _raw_spin_lock+0x22/0x37
 ? rtl8139_poll+0x31/0x34e
 rtl8139_poll+0x31/0x34e
 ? enable_irq+0x45/0x59
 netpoll_poll_dev+0xd7/0x1c7
 netpoll_send_skb+0x12d/0x25a
 netpoll_send_udp+0x386/0x394
 write_msg+0x83/0xa7
 ? netconsole_netdev_event+0x14d/0x14d
 console_unlock+0x333/0x400
 vprintk_emit+0x182/0x19c
 vprintk_default+0x10/0x14
 vprintk+0x46/0x4c
 _printk+0xf/0x11
 crng_fast_load+0xdf/0xee
 add_interrupt_randomness+0x159/0x221
 handle_irq_event_percpu+0x24/0x3e
 handle_irq_event+0x29/0x42
 handle_fasteoi_irq+0x69/0xdf
 ? handle_level_irq+0x89/0x89
 __handle_irq+0x7d/0xa2
 </IRQ>
 __common_interrupt+0x68/0xc9
 common_interrupt+0x22/0x39
 asm_common_interrupt+0xff/0x180
EIP: default_idle+0xa/0xc
Code: 89 c3 89 55 f8 e8 fb cf ff ff 8b 4d f8 31 d2 89 d8 e8 b7 d3 e5 ff 5b 5b 5d 31 d2 89 d1 c3 cc cc 55 89 e5 e8 14 53 a3 ff fb f4 <5d> c3 55 89 e5 64 a1 f8 77 dd d5 f0 80 48 02 20 8b 10 80 e2 08 75
EAX: d59e0ea0 EBX: 00000000 ECX: 00000000 EDX: 00000000
ESI: d5c5c800 EDI: 00000000 EBP: d5c55f1c ESP: d5c55f1c
DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00200246
 ? __sched_text_end+0x2/0x2
 ? task_blocks_on_rt_mutex.constprop.0.isra.0+0x254/0x283
 ? default_idle+0xa/0xc
 arch_cpu_idle+0xd/0x11
 default_idle_call+0x48/0x78
 do_idle+0xbe/0x1d0
 cpu_startup_entry+0x19/0x1b
 rest_init+0x121/0x12a
 arch_call_rest_init+0x11/0x4b
 start_kernel+0x6a2/0x6c6
 i386_start_kernel+0x5d/0x75
 startup_32_smp+0x161/0x164
netconsole: network logging started
Comment 14 Erhard F. 2021-10-18 15:48:21 UTC 
Created attachment 299249 [details]
kernel .config (kernel 5.15-rc6, Shuttle XPC FS51, Pentium 4)
Comment 15 Erhard F. 2022-02-08 22:53:01 UTC 
Created attachment 300418 [details]
dmesg (kernel 5.17-rc3, Shuttle XPC FS51, Pentium 4)

Still in 5.17-rc3.

[...]
printk: console [netcon0] enabled

================================
WARNING: inconsistent lock state
5.17.0-rc3-P4 #2 Not tainted
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
c12d98a4 (&tp->rx_lock){?.-.}-{2:2}, at: rtl8139_poll+0x2b/0x404
{HARDIRQ-ON-W} state was registered at:
  lock_acquire+0xa7/0x165
  _raw_spin_lock+0x23/0x31
  rtl8139_poll+0x2b/0x404
  __napi_poll+0x26/0x13d
  net_rx_action+0xf0/0x213
  __do_softirq+0x136/0x27f
  do_softirq_own_stack+0x50/0x56
  irq_exit_rcu+0x96/0xa9
  common_interrupt+0x29/0x3c
  asm_common_interrupt+0xff/0x180
  default_idle+0xe/0x10
  arch_cpu_idle+0xd/0xf
  default_idle_call+0x48/0x7c
  do_idle+0xc7/0x1f2
  cpu_startup_entry+0x17/0x19
  rest_init+0x1af/0x1b2
  arch_call_rest_init+0x8/0xa
  start_kernel+0x2c6/0x33e
  i386_start_kernel+0x94/0x97
  startup_32_smp+0x161/0x164
irq event stamp: 23324
hardirqs last  enabled at (23323): [<d8555e47>] default_idle_call+0x39/0x7c
hardirqs last disabled at (23324): [<d854dbed>] common_interrupt+0x10/0x3c
softirqs last  enabled at (23194): [<d8557d00>] __do_softirq+0x250/0x27f
softirqs last disabled at (23189): [<d7e170f1>] do_softirq_own_stack+0x50/0x56

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&tp->rx_lock);
  <Interrupt>
    lock(&tp->rx_lock);

 *** DEADLOCK ***
[...]
Comment 16 Erhard F. 2022-02-08 22:53:31 UTC 
Created attachment 300419 [details]
kernel .config (kernel 5.17-rc3, Shuttle XPC FS51, Pentium 4)
Comment 17 Erhard F. 2022-08-26 09:01:14 UTC 
Have not seen this on 5.18.x, 5.19.x nor on 6.0-rc. I think it's safe to close here.