[jlayton:rpc-shutdown] [sunrpc] 59a0395397: WARNING:at_net/sunrpc/sunrpc_syms.c:#sunrpc_pre_exit_net

[jlayton:rpc-shutdown] [sunrpc] 59a0395397: WARNING:at_net/sunrpc/sunrpc_syms.c:#sunrpc_pre_exit_net

[kernel test robot]

Hello,

kernel test robot noticed "WARNING:at_net/sunrpc/sunrpc_syms.c:#sunrpc_pre_exit_net" on:

commit: 59a0395397f8ccf9987755bb42929d3e6eb81c87 ("sunrpc: don't hold a struct net reference in rpc_xprt")
https://git.kernel.org/cgit/linux/kernel/git/jlayton/linux.git rpc-shutdown

in testcase: boot

config: x86_64-rhel-9.4-kselftests
compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+----------------------------------------------------------+------------+------------+
|                                                          | 00e89d2d41 | 59a0395397 |
+----------------------------------------------------------+------------+------------+
| WARNING:at_net/sunrpc/sunrpc_syms.c:#sunrpc_pre_exit_net | 0          | 12         |
| RIP:sunrpc_pre_exit_net                                  | 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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202503271441.962cfd7a-lkp@intel.com


[   42.506727][   T12] ------------[ cut here ]------------
[ 42.507690][ T12] WARNING: CPU: 0 PID: 12 at net/sunrpc/sunrpc_syms.c:84 sunrpc_pre_exit_net (net/sunrpc/sunrpc_syms.c:84 net/sunrpc/sunrpc_syms.c:104) 
[   42.509081][   T12] Modules linked in: i2c_piix4(+) parport_pc(+) i2c_smbus pcspkr drm_kms_helper(+) parport drm fuse ip_tables
[   42.510761][   T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.14.0-rc6-00006-g59a0395397f8 #1
[   42.512482][   T12] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[   42.512502][   T12] Workqueue: netns cleanup_net
[ 42.512522][ T12] RIP: 0010:sunrpc_pre_exit_net (net/sunrpc/sunrpc_syms.c:84 net/sunrpc/sunrpc_syms.c:104) 
[ 42.512537][ T12] Code: 8b 3c 24 4c 89 fe e8 f1 f7 65 fd e9 2b ff ff ff 49 8d bc 24 f0 00 00 00 be ff ff ff ff e8 ca da 1c 00 85 c0 0f 85 4e fe ff ff <0f> 0b e9 47 fe ff ff 48 89 eb e9 ac fe ff ff 48 c7 c7 b4 3a c8 b2
All code
========
   0:	8b 3c 24             	mov    (%rsp),%edi
   3:	4c 89 fe             	mov    %r15,%rsi
   6:	e8 f1 f7 65 fd       	call   0xfffffffffd65f7fc
   b:	e9 2b ff ff ff       	jmp    0xffffffffffffff3b
  10:	49 8d bc 24 f0 00 00 	lea    0xf0(%r12),%rdi
  17:	00 
  18:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1d:	e8 ca da 1c 00       	call   0x1cdaec
  22:	85 c0                	test   %eax,%eax
  24:	0f 85 4e fe ff ff    	jne    0xfffffffffffffe78
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	e9 47 fe ff ff       	jmp    0xfffffffffffffe78
  31:	48 89 eb             	mov    %rbp,%rbx
  34:	e9 ac fe ff ff       	jmp    0xfffffffffffffee5
  39:	48 c7 c7 b4 3a c8 b2 	mov    $0xffffffffb2c83ab4,%rdi

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	e9 47 fe ff ff       	jmp    0xfffffffffffffe4e
   7:	48 89 eb             	mov    %rbp,%rbx
   a:	e9 ac fe ff ff       	jmp    0xfffffffffffffebb
   f:	48 c7 c7 b4 3a c8 b2 	mov    $0xffffffffb2c83ab4,%rdi
[   42.512544][   T12] RSP: 0018:ffffc900000cfab0 EFLAGS: 00210246
[   42.512553][   T12] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
[   42.512558][   T12] RDX: 0000000000000000 RSI: ffff88810d7d48f0 RDI: ffff8881008c5a40
[   42.512563][   T12] RBP: dffffc0000000000 R08: 0000000000000001 R09: fffffbfff658fe24
[   42.512569][   T12] R10: ffffffffb2c7f127 R11: ffffffffb40c5810 R12: ffff88810d7d4800
[   42.512574][   T12] R13: ffffc900000cfbe0 R14: ffffffffb2ba8738 R15: ffff88810d761c00
[   42.512579][   T12] FS:  0000000000000000(0000) GS:ffff8883aee00000(0000) knlGS:0000000000000000
[   42.512589][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.512595][   T12] CR2: 00000000f652814c CR3: 000000017b800000 CR4: 00000000000406f0
[   42.512601][   T12] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.512605][   T12] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.512611][   T12] Call Trace:
[   42.512615][   T12]  <TASK>
[  OK  ] Started System Logging Service.
[ 42.512623][ T12] ? __warn (kernel/panic.c:748) 
[ 42.512633][ T12] ? sunrpc_pre_exit_net (net/sunrpc/sunrpc_syms.c:84 net/sunrpc/sunrpc_syms.c:104) 
[ 42.512648][ T12] ? report_bug (lib/bug.c:180 lib/bug.c:219) 
[ 42.512666][ T12] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 42.512678][ T12] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 42.512689][ T12] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:574) 
[ 42.512728][ T12] ? sunrpc_pre_exit_net (net/sunrpc/sunrpc_syms.c:84 net/sunrpc/sunrpc_syms.c:104) 
[ 42.512749][ T12] ? __pfx_sunrpc_pre_exit_net (net/sunrpc/sunrpc_syms.c:101) 
[ 42.512758][ T12] ? mark_lock (arch/x86/include/asm/bitops.h:227 (discriminator 3) arch/x86/include/asm/bitops.h:239 (discriminator 3) include/asm-generic/bitops/instrumented-non-atomic.h:142 (discriminator 3) kernel/locking/lockdep.c:230 (discriminator 3) kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 42.512777][ T12] ? mark_held_locks (kernel/locking/lockdep.c:4323) 
[ 42.512802][ T12] cleanup_net (net/core/net_namespace.c:161 net/core/net_namespace.c:632) 
[ 42.512811][ T12] ? __pfx_lock_acquire (kernel/locking/lockdep.c:5819) 
[ 42.512824][ T12] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 42.512831][ T12] ? do_raw_spin_lock (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 42.512840][ T12] ? lock_is_held_type (kernel/locking/lockdep.c:5592 kernel/locking/lockdep.c:5923) 
[ 42.512898][ T12] process_one_work (kernel/workqueue.c:3243) 
[ 42.512936][ T12] ? __pfx_lock_acquire (kernel/locking/lockdep.c:5819) 
[ 42.512949][ T12] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 42.512973][ T12] ? assign_work (kernel/workqueue.c:1200) 
[ 42.512980][ T12] ? lock_is_held_type (kernel/locking/lockdep.c:5592 kernel/locking/lockdep.c:5923) 
[ 42.512997][ T12] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 42.513029][ T12] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 42.513038][ T12] kthread (kernel/kthread.c:464) 
[ 42.513050][ T12] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.513069][ T12] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.513080][ T12] ret_from_fork (arch/x86/kernel/process.c:154) 
[ 42.513092][ T12] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.513103][ T12] ret_from_fork_asm (arch/x86/entry/entry_64.S:257) 
[   42.513148][   T12]  </TASK>
[   42.513154][   T12] irq event stamp: 12365
[ 42.513159][ T12] hardirqs last enabled at (12371): console_trylock_spinning (arch/x86/include/asm/irqflags.h:42 arch/x86/include/asm/irqflags.h:97 arch/x86/include/asm/irqflags.h:155 kernel/printk/printk.c:2043) 
[ 42.513170][ T12] hardirqs last disabled at (12376): console_trylock_spinning (kernel/printk/printk.c:2022 (discriminator 1)) 
[ 42.513178][ T12] softirqs last enabled at (12056): handle_softirqs (arch/x86/include/asm/preempt.h:26 kernel/softirq.c:408 kernel/softirq.c:589) 
[ 42.513188][ T12] softirqs last disabled at (12041): __irq_exit_rcu (kernel/softirq.c:596 kernel/softirq.c:435 kernel/softirq.c:662) 
[   42.513196][   T12] ---[ end trace 0000000000000000 ]---


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250327/202503271441.962cfd7a-lkp@intel.com


-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki