linux-kernel - Re: [RFC PATCH v2 4/4] sched+mm: Use hazard pointers to track lazy active mm existence

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Message-ID: <202410072229.18756716-oliver.sang@intel.com>
Date: Mon, 7 Oct 2024 22:50:23 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, Nicholas Piggin
	<npiggin@...il.com>, Michael Ellerman <mpe@...erman.id.au>, "Greg
 Kroah-Hartman" <gregkh@...uxfoundation.org>, Sebastian Andrzej Siewior
	<bigeasy@...utronix.de>, "Paul E. McKenney" <paulmck@...nel.org>, Will Deacon
	<will@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Boqun Feng
	<boqun.feng@...il.com>, Alan Stern <stern@...land.harvard.edu>, John Stultz
	<jstultz@...gle.com>, Neeraj Upadhyay <Neeraj.Upadhyay@....com>, "Linus
 Torvalds" <torvalds@...ux-foundation.org>, Andrew Morton
	<akpm@...ux-foundation.org>, Frederic Weisbecker <frederic@...nel.org>, "Joel
 Fernandes" <joel@...lfernandes.org>, Josh Triplett <josh@...htriplett.org>,
	Uladzislau Rezki <urezki@...il.com>, Steven Rostedt <rostedt@...dmis.org>,
	Lai Jiangshan <jiangshanlai@...il.com>, Zqiang <qiang.zhang1211@...il.com>,
	Ingo Molnar <mingo@...hat.com>, Waiman Long <longman@...hat.com>, "Mark
 Rutland" <mark.rutland@....com>, Thomas Gleixner <tglx@...utronix.de>,
	Vlastimil Babka <vbabka@...e.cz>, Mateusz Guzik <mjguzik@...il.com>, "Jonas
 Oberhauser" <jonas.oberhauser@...weicloud.com>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-mm@...ck.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	<maged.michael@...il.com>, <rcu@...r.kernel.org>, <lkmm@...ts.linux.dev>,
	<oliver.sang@...el.com>
Subject: Re: [RFC PATCH v2 4/4] sched+mm: Use hazard pointers to track lazy
 active mm existence



Hello,

kernel test robot noticed "BUG:using_smp_processor_id()in_preemptible" on:

commit: efef4da3b19cadf4beb45079a05643a77821de79 ("[RFC PATCH v2 4/4] sched+mm: Use hazard pointers to track lazy active mm existence")
url: https://github.com/intel-lab-lkp/linux/commits/Mathieu-Desnoyers/compiler-h-Introduce-ptr_eq-to-preserve-address-dependency/20241005-023027
base: https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git next
patch link: https://lore.kernel.org/all/20241004182734.1761555-5-mathieu.desnoyers@efficios.com/
patch subject: [RFC PATCH v2 4/4] sched+mm: Use hazard pointers to track lazy active mm existence

in testcase: boot

compiler: gcc-12
test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G

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


+--------------------------------------------+------------+------------+
|                                            | 75b478bf10 | efef4da3b1 |
+--------------------------------------------+------------+------------+
| BUG:using_smp_processor_id()in_preemptible | 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/202410072229.18756716-oliver.sang@intel.com


[    6.336856][   T48] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u10:1/48
[ 6.338102][ T48] caller is debug_smp_processor_id (lib/smp_processor_id.c:61) 
[    6.338809][   T48] CPU: 0 UID: 0 PID: 48 Comm: kworker/u10:1 Not tainted 6.12.0-rc1-00004-gefef4da3b19c #5
[    6.339929][   T48] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[    6.341119][   T48] Call Trace:
[ 6.341504][ T48] dump_stack_lvl (lib/dump_stack.c:123) 
[ 6.342057][ T48] dump_stack (lib/dump_stack.c:130) 
[ 6.342065][ T48] check_preemption_disabled (arch/x86/include/asm/preempt.h:84 lib/smp_processor_id.c:53) 
[ 6.342065][ T48] debug_smp_processor_id (lib/smp_processor_id.c:61) 
[ 6.342065][ T48] exec_mmap (include/linux/sched/mm.h:91 fs/exec.c:1017) 
[ 6.342065][ T48] ? would_dump (fs/exec.c:1409) 
[ 6.342065][ T48] begin_new_exec (fs/exec.c:1280) 
[ 6.342065][ T48] ? load_elf_phdrs (fs/binfmt_elf.c:534) 
[ 6.342065][ T48] load_elf_binary (fs/binfmt_elf.c:996) 
[ 6.342065][ T48] ? get_lock_stats (kernel/locking/lockdep.c:339) 
[ 6.342065][ T48] ? search_binary_handler (fs/exec.c:1752) 
[ 6.342065][ T48] search_binary_handler (fs/exec.c:1752) 
[ 6.342065][ T48] exec_binprm (fs/exec.c:1795) 
[ 6.342065][ T48] bprm_execve (fs/exec.c:1846 fs/exec.c:1821) 
[ 6.342065][ T48] kernel_execve (fs/exec.c:2012) 
[ 6.342065][ T48] call_usermodehelper_exec_async (kernel/umh.c:110) 
[ 6.342065][ T48] ? umh_complete (kernel/umh.c:65) 
[ 6.342065][ T48] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 6.342065][ T48] ? umh_complete (kernel/umh.c:65) 
[ 6.342065][ T48] ret_from_fork_asm (arch/x86/entry/entry_32.S:737) 
[ 6.342065][ T48] entry_INT80_32 (arch/x86/entry/entry_32.S:944) 
[    6.352140][    T1] ppdev: user-space parallel port driver
[    6.353841][    T1] HSI/SSI char device loaded
[    6.354238][    T1] e1000: Intel(R) PRO/1000 Network Driver
[    6.354673][    T1] e1000: Copyright (c) 1999-2006 Intel Corporation.
[    6.650009][    T1] ACPI: _SB_.LNKC: Enabled at IRQ 11
[    6.968868][    T1] e1000 0000:00:03.0 eth0: (PCI:33MHz:32-bit) 52:54:00:12:34:56
[    6.969500][    T1] e1000 0000:00:03.0 eth0: Intel(R) PRO/1000 Network Connection
[    6.970506][   T49] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u10:1/49
[ 6.971191][ T49] caller is debug_smp_processor_id (lib/smp_processor_id.c:61) 
[    6.971650][   T49] CPU: 0 UID: 0 PID: 49 Comm: kworker/u10:1 Not tainted 6.12.0-rc1-00004-gefef4da3b19c #5
[    6.972365][   T49] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[    6.973115][   T49] Call Trace:
[ 6.973356][ T49] dump_stack_lvl (lib/dump_stack.c:123) 
[ 6.973686][ T49] dump_stack (lib/dump_stack.c:130) 
[ 6.973983][ T49] check_preemption_disabled (arch/x86/include/asm/preempt.h:84 lib/smp_processor_id.c:53) 
[ 6.974328][ T49] debug_smp_processor_id (lib/smp_processor_id.c:61) 
[ 6.974328][ T49] exec_mmap (include/linux/sched/mm.h:91 fs/exec.c:1017) 
[ 6.974328][ T49] ? would_dump (fs/exec.c:1409) 
[ 6.974328][ T49] begin_new_exec (fs/exec.c:1280) 
[ 6.974328][ T49] ? load_elf_phdrs (fs/binfmt_elf.c:534) 
[ 6.974328][ T49] load_elf_binary (fs/binfmt_elf.c:996) 
[ 6.974328][ T49] ? get_lock_stats (kernel/locking/lockdep.c:339) 
[ 6.974328][ T49] ? search_binary_handler (fs/exec.c:1752) 
[ 6.974328][ T49] search_binary_handler (fs/exec.c:1752) 
[ 6.974328][ T49] exec_binprm (fs/exec.c:1795) 
[ 6.974328][ T49] bprm_execve (fs/exec.c:1846 fs/exec.c:1821) 
[ 6.974328][ T49] kernel_execve (fs/exec.c:2012) 
[ 6.974328][ T49] call_usermodehelper_exec_async (kernel/umh.c:110) 
[ 6.974328][ T49] ? umh_complete (kernel/umh.c:65) 
[ 6.974328][ T49] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 6.974328][ T49] ? umh_complete (kernel/umh.c:65) 
[ 6.974328][ T49] ret_from_fork_asm (arch/x86/entry/entry_32.S:737) 
[ 6.974328][ T49] entry_INT80_32 (arch/x86/entry/entry_32.S:944) 



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20241007/202410072229.18756716-oliver.sang@intel.com



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