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From: kernel test robot <oliver.sang@intel.com>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
	<linux-kernel@vger.kernel.org>, <ltp@lists.linux.it>,
	<oliver.sang@intel.com>
Subject: [paulmckrcu:dev.2026.05.07a] [rcutorture]  c2e6a63ac1: RIP:rcu_torture_irq[rcutorture]
Date: Thu, 21 May 2026 15:54:05 +0800	[thread overview]
Message-ID: <202605211529.6ba1b4ff-lkp@intel.com> (raw)


hi, Paul,

below report is just FYI. if the issue is soloved on newer branched, please just
ignore. thanks


Hello,


kernel test robot noticed "RIP:rcu_torture_irq[rcutorture]" on:

commit: c2e6a63ac168107454d5fe595c1213e5760d642f ("rcutorture: Test RCU readers from hardware interrupt handlers")
https://github.com/paulmckrcu/linux dev.2026.05.07a

in testcase: ltp
version: 
with following parameters:

	test: kernel_misc



config: x86_64-rhel-9.4-ltp
compiler: gcc-14
test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4790T CPU @ 2.70GHz (Haswell) with 16G memory

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



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/202605211529.6ba1b4ff-lkp@intel.com



kern  :warn  : [  434.509085] [   T5907] ------------[ cut here ]------------
kern  :warn  : [  434.509089] [   T5907] WARNING: kernel/rcu/rcutorture.c:2653 at rcu_torture_irq+0x119/0x170 [rcutorture], CPU#2: rcu_torture_rea/5907
kern  :warn  : [  434.509137] [   T5907] Modules linked in: rcutorture(+) torture netconsole binfmt_misc snd_hda_codec_intelhdmi snd_hda_codec_hdmi btrfs libblake2b zstd_compress raid6_pq intel_rapl_msr intel_rapl_common xor snd_hda_codec_alc882 x86_pkg_temp_thermal snd_hda_codec_realtek_lib i915 snd_hda_codec_generic intel_powerclamp sd_mod coretemp snd_hda_intel intel_gtt drm_buddy sg snd_hda_codec ttm kvm_intel snd_soc_rt5640 drm_display_helper snd_soc_rl6231 snd_hda_core regmap_i2c kvm snd_intel_dspcfg cec snd_soc_core snd_intel_sdw_acpi drm_client_lib snd_hwdep snd_compress irqbypass drm_kms_helper rapl mxm_wmi ahci snd_pcm libahci alx video intel_cstate intel_uncore pcspkr mei_me i2c_i801 libata mdio snd_timer mei i2c_smbus lpc_ich snd wmi soundcore acpi_pad joydev drm fuse nfnetlink [last unloaded: ltp_uaccess(OE)]
kern  :warn  : [  434.509249] [   T5907] CPU: 2 UID: 0 PID: 5907 Comm: rcu_torture_rea Tainted: G S      W  OE       7.1.0-rc1+ #1 PREEMPT(lazy)
kern  :warn  : [  434.509265] [   T5907] Tainted: [S]=CPU_OUT_OF_SPEC, [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
kern  :warn  : [  434.509267] [   T5907] Hardware name: Gigabyte Technology Co., Ltd. Z97X-UD5H/Z97X-UD5H, BIOS F9 04/21/2015
kern  :warn  : [  434.509270] [   T5907] RIP: 0010:rcu_torture_irq (rcu/rcutorture.c:2654 (discriminator 1)) rcutorture
kern  :warn  : [  434.509287] [   T5907] Code: 93 20 01 00 00 48 83 c4 08 48 c7 c6 10 bb 19 c1 48 89 c7 5b e9 68 14 f7 c2 48 83 c4 08 5b c3 cc cc cc cc 0f 0b e9 0e ff ff ff <0f> 0b e9 fc fe ff ff e8 5b 00 da c0 e9 5a ff ff ff 48 89 04 24 e8
All code
========
   0:	93                   	xchg   %eax,%ebx
   1:	20 01                	and    %al,(%rcx)
   3:	00 00                	add    %al,(%rax)
   5:	48 83 c4 08          	add    $0x8,%rsp
   9:	48 c7 c6 10 bb 19 c1 	mov    $0xffffffffc119bb10,%rsi
  10:	48 89 c7             	mov    %rax,%rdi
  13:	5b                   	pop    %rbx
  14:	e9 68 14 f7 c2       	jmp    0xffffffffc2f71481
  19:	48 83 c4 08          	add    $0x8,%rsp
  1d:	5b                   	pop    %rbx
  1e:	c3                   	ret
  1f:	cc                   	int3
  20:	cc                   	int3
  21:	cc                   	int3
  22:	cc                   	int3
  23:	0f 0b                	ud2
  25:	e9 0e ff ff ff       	jmp    0xffffffffffffff38
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	e9 fc fe ff ff       	jmp    0xffffffffffffff2d
  31:	e8 5b 00 da c0       	call   0xffffffffc0da0091
  36:	e9 5a ff ff ff       	jmp    0xffffffffffffff95
  3b:	48 89 04 24          	mov    %rax,(%rsp)
  3f:	e8                   	.byte 0xe8

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	e9 fc fe ff ff       	jmp    0xffffffffffffff03
   7:	e8 5b 00 da c0       	call   0xffffffffc0da0067
   c:	e9 5a ff ff ff       	jmp    0xffffffffffffff6b
  11:	48 89 04 24          	mov    %rax,(%rsp)
  15:	e8                   	.byte 0xe8
kern  :warn  : [  434.509290] [   T5907] RSP: 0018:ffffc9000261fc10 EFLAGS: 00010046
kern  :warn  : [  434.509294] [   T5907] RAX: 0000000080000002 RBX: ffff888396343248 RCX: ffffffff81828b23
kern  :warn  : [  434.509297] [   T5907] RDX: 0000000000000000 RSI: ffff888396343240 RDI: 0000000000000000
kern  :warn  : [  434.509299] [   T5907] RBP: 0000000000000246 R08: 0000000000000000 R09: fffffbfff0c72894
kern  :warn  : [  434.509301] [   T5907] R10: ffffffff863944a7 R11: 0000000000000000 R12: ffffffffc11a3f10
kern  :warn  : [  434.509303] [   T5907] R13: 0000000000000000 R14: ffffffffc11a3f10 R15: 0000000000000000
kern  :warn  : [  434.509316] [   T5907] FS:  0000000000000000(0000) GS:ffff88840ef63000(0000) knlGS:0000000000000000
kern  :warn  : [  434.509318] [   T5907] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kern  :warn  : [  434.509320] [   T5907] CR2: 000056053f590492 CR3: 000000041c870005 CR4: 00000000001726f0
kern  :warn  : [  434.509323] [   T5907] Call Trace:
kern  :warn  : [  434.509325] [   T5907]  <TASK>
kern  :warn  : [  434.509327] [   T5907]  generic_exec_single (smp.c:136 smp.c:453)
kern  :warn  : [  434.509332] [   T5907]  ? __pfx_rcu_torture_irq (rcu/rcutorture.c:2607) rcutorture
kern  :warn  : [  434.509360] [   T5907]  smp_call_function_single (smp.c:699)
kern  :warn  : [  434.509364] [   T5907]  ? __pfx_smp_call_function_single (smp.c:375 (discriminator 4))
kern  :warn  : [  434.509367] [   T5907]  ? local_clock_noinstr (sched/clock.c:307)
kern  :warn  : [  434.509371] [   T5907] rcu_torture_reader (rcu/rcutorture.c:2700) rcutorture
kern  :warn  : [  434.509398] [   T5907]  ? __pfx_rcu_torture_reader (rcu/rcutorture.c:4041) rcutorture
kern  :warn  : [  434.509412] [   T5907]  ? _raw_spin_lock_irqsave (linux/instrumented.h:55 linux/atomic/atomic-instrumented.h:1301 asm-generic/qspinlock.h:111 linux/spinlock.h:187 linux/spinlock_api_smp.h:133 locking/spinlock.c:166)
kern  :warn  : [  434.509417] [   T5907]  ? __pfx_rcu_torture_timer (linux/slab.h:950) rcutorture
kern  :warn  : [  434.509443] [   T5907]  ? __kthread_parkme (linux/instrumented.h:82 asm-generic/bitops/instrumented-non-atomic.h:141 kthread.c:272)
kern  :warn  : [  434.509448] [   T5907]  ? __pfx_rcu_torture_reader (rcu/rcutorture.c:4041) rcutorture
kern  :warn  : [  434.509465] [   T5907]  ? __pfx_rcu_torture_reader (rcu/rcutorture.c:4041) rcutorture
kern  :warn  : [  434.509490] [   T5907]  kthread (kthread.c:436)
kern  :warn  : [  434.509493] [   T5907]  ? recalc_sigpending (linux/instrumented.h:97 asm-generic/bitops/instrumented-atomic.h:41 linux/thread_info.h:109 signal.c:181)
kern  :warn  : [  434.509495] [   T5907]  ? __pfx_kthread (linux/list.h:381 (discriminator 2))
kern  :warn  : [  434.509498] [   T5907]  ret_from_fork (x86/kernel/process.c:158)
kern  :warn  : [  434.509502] [   T5907]  ? __pfx_ret_from_fork (x86/include/asm/entry-common.h:54)
kern  :warn  : [  434.509504] [   T5907]  ? switch_fpu (linux/instrumented.h:82 asm-generic/bitops/instrumented-non-atomic.h:141 linux/thread_info.h:133 linux/sched.h:2067 x86/include/asm/fpu/sched.h:34)
kern  :warn  : [  434.509508] [   T5907]  ? __switch_to (x86/kernel/process_64.c:403 x86/kernel/process_64.c:663)
kern  :warn  : [  434.509511] [   T5907]  ? __switch_to_asm (x86/entry/entry_64.S:206)
kern  :warn  : [  434.509515] [   T5907]  ? __pfx_kthread (linux/list.h:381 (discriminator 2))
kern  :warn  : [  434.509517] [   T5907]  ret_from_fork_asm (x86/entry/entry_64.S:245)
kern  :warn  : [  434.509522] [   T5907]  </TASK>
kern  :warn  : [  434.509523] [   T5907] ---[ end trace 0000000000000000 ]---


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260521/202605211529.6ba1b4ff-lkp@intel.com



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


WARNING: multiple messages have this Message-ID (diff)
From: kernel test robot <oliver.sang@intel.com>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: oe-lkp@lists.linux.dev, oliver.sang@intel.com, lkp@intel.com,
	ltp@lists.linux.it, linux-kernel@vger.kernel.org
Subject: [LTP] [paulmckrcu:dev.2026.05.07a] [rcutorture] c2e6a63ac1: RIP:rcu_torture_irq[rcutorture]
Date: Thu, 21 May 2026 15:54:05 +0800	[thread overview]
Message-ID: <202605211529.6ba1b4ff-lkp@intel.com> (raw)


hi, Paul,

below report is just FYI. if the issue is soloved on newer branched, please just
ignore. thanks


Hello,


kernel test robot noticed "RIP:rcu_torture_irq[rcutorture]" on:

commit: c2e6a63ac168107454d5fe595c1213e5760d642f ("rcutorture: Test RCU readers from hardware interrupt handlers")
https://github.com/paulmckrcu/linux dev.2026.05.07a

in testcase: ltp
version: 
with following parameters:

	test: kernel_misc



config: x86_64-rhel-9.4-ltp
compiler: gcc-14
test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4790T CPU @ 2.70GHz (Haswell) with 16G memory

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



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/202605211529.6ba1b4ff-lkp@intel.com



kern  :warn  : [  434.509085] [   T5907] ------------[ cut here ]------------
kern  :warn  : [  434.509089] [   T5907] WARNING: kernel/rcu/rcutorture.c:2653 at rcu_torture_irq+0x119/0x170 [rcutorture], CPU#2: rcu_torture_rea/5907
kern  :warn  : [  434.509137] [   T5907] Modules linked in: rcutorture(+) torture netconsole binfmt_misc snd_hda_codec_intelhdmi snd_hda_codec_hdmi btrfs libblake2b zstd_compress raid6_pq intel_rapl_msr intel_rapl_common xor snd_hda_codec_alc882 x86_pkg_temp_thermal snd_hda_codec_realtek_lib i915 snd_hda_codec_generic intel_powerclamp sd_mod coretemp snd_hda_intel intel_gtt drm_buddy sg snd_hda_codec ttm kvm_intel snd_soc_rt5640 drm_display_helper snd_soc_rl6231 snd_hda_core regmap_i2c kvm snd_intel_dspcfg cec snd_soc_core snd_intel_sdw_acpi drm_client_lib snd_hwdep snd_compress irqbypass drm_kms_helper rapl mxm_wmi ahci snd_pcm libahci alx video intel_cstate intel_uncore pcspkr mei_me i2c_i801 libata mdio snd_timer mei i2c_smbus lpc_ich snd wmi soundcore acpi_pad joydev drm fuse nfnetlink [last unloaded: ltp_uaccess(OE)]
kern  :warn  : [  434.509249] [   T5907] CPU: 2 UID: 0 PID: 5907 Comm: rcu_torture_rea Tainted: G S      W  OE       7.1.0-rc1+ #1 PREEMPT(lazy)
kern  :warn  : [  434.509265] [   T5907] Tainted: [S]=CPU_OUT_OF_SPEC, [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
kern  :warn  : [  434.509267] [   T5907] Hardware name: Gigabyte Technology Co., Ltd. Z97X-UD5H/Z97X-UD5H, BIOS F9 04/21/2015
kern  :warn  : [  434.509270] [   T5907] RIP: 0010:rcu_torture_irq (rcu/rcutorture.c:2654 (discriminator 1)) rcutorture
kern  :warn  : [  434.509287] [   T5907] Code: 93 20 01 00 00 48 83 c4 08 48 c7 c6 10 bb 19 c1 48 89 c7 5b e9 68 14 f7 c2 48 83 c4 08 5b c3 cc cc cc cc 0f 0b e9 0e ff ff ff <0f> 0b e9 fc fe ff ff e8 5b 00 da c0 e9 5a ff ff ff 48 89 04 24 e8
All code
========
   0:	93                   	xchg   %eax,%ebx
   1:	20 01                	and    %al,(%rcx)
   3:	00 00                	add    %al,(%rax)
   5:	48 83 c4 08          	add    $0x8,%rsp
   9:	48 c7 c6 10 bb 19 c1 	mov    $0xffffffffc119bb10,%rsi
  10:	48 89 c7             	mov    %rax,%rdi
  13:	5b                   	pop    %rbx
  14:	e9 68 14 f7 c2       	jmp    0xffffffffc2f71481
  19:	48 83 c4 08          	add    $0x8,%rsp
  1d:	5b                   	pop    %rbx
  1e:	c3                   	ret
  1f:	cc                   	int3
  20:	cc                   	int3
  21:	cc                   	int3
  22:	cc                   	int3
  23:	0f 0b                	ud2
  25:	e9 0e ff ff ff       	jmp    0xffffffffffffff38
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	e9 fc fe ff ff       	jmp    0xffffffffffffff2d
  31:	e8 5b 00 da c0       	call   0xffffffffc0da0091
  36:	e9 5a ff ff ff       	jmp    0xffffffffffffff95
  3b:	48 89 04 24          	mov    %rax,(%rsp)
  3f:	e8                   	.byte 0xe8

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	e9 fc fe ff ff       	jmp    0xffffffffffffff03
   7:	e8 5b 00 da c0       	call   0xffffffffc0da0067
   c:	e9 5a ff ff ff       	jmp    0xffffffffffffff6b
  11:	48 89 04 24          	mov    %rax,(%rsp)
  15:	e8                   	.byte 0xe8
kern  :warn  : [  434.509290] [   T5907] RSP: 0018:ffffc9000261fc10 EFLAGS: 00010046
kern  :warn  : [  434.509294] [   T5907] RAX: 0000000080000002 RBX: ffff888396343248 RCX: ffffffff81828b23
kern  :warn  : [  434.509297] [   T5907] RDX: 0000000000000000 RSI: ffff888396343240 RDI: 0000000000000000
kern  :warn  : [  434.509299] [   T5907] RBP: 0000000000000246 R08: 0000000000000000 R09: fffffbfff0c72894
kern  :warn  : [  434.509301] [   T5907] R10: ffffffff863944a7 R11: 0000000000000000 R12: ffffffffc11a3f10
kern  :warn  : [  434.509303] [   T5907] R13: 0000000000000000 R14: ffffffffc11a3f10 R15: 0000000000000000
kern  :warn  : [  434.509316] [   T5907] FS:  0000000000000000(0000) GS:ffff88840ef63000(0000) knlGS:0000000000000000
kern  :warn  : [  434.509318] [   T5907] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kern  :warn  : [  434.509320] [   T5907] CR2: 000056053f590492 CR3: 000000041c870005 CR4: 00000000001726f0
kern  :warn  : [  434.509323] [   T5907] Call Trace:
kern  :warn  : [  434.509325] [   T5907]  <TASK>
kern  :warn  : [  434.509327] [   T5907]  generic_exec_single (smp.c:136 smp.c:453)
kern  :warn  : [  434.509332] [   T5907]  ? __pfx_rcu_torture_irq (rcu/rcutorture.c:2607) rcutorture
kern  :warn  : [  434.509360] [   T5907]  smp_call_function_single (smp.c:699)
kern  :warn  : [  434.509364] [   T5907]  ? __pfx_smp_call_function_single (smp.c:375 (discriminator 4))
kern  :warn  : [  434.509367] [   T5907]  ? local_clock_noinstr (sched/clock.c:307)
kern  :warn  : [  434.509371] [   T5907] rcu_torture_reader (rcu/rcutorture.c:2700) rcutorture
kern  :warn  : [  434.509398] [   T5907]  ? __pfx_rcu_torture_reader (rcu/rcutorture.c:4041) rcutorture
kern  :warn  : [  434.509412] [   T5907]  ? _raw_spin_lock_irqsave (linux/instrumented.h:55 linux/atomic/atomic-instrumented.h:1301 asm-generic/qspinlock.h:111 linux/spinlock.h:187 linux/spinlock_api_smp.h:133 locking/spinlock.c:166)
kern  :warn  : [  434.509417] [   T5907]  ? __pfx_rcu_torture_timer (linux/slab.h:950) rcutorture
kern  :warn  : [  434.509443] [   T5907]  ? __kthread_parkme (linux/instrumented.h:82 asm-generic/bitops/instrumented-non-atomic.h:141 kthread.c:272)
kern  :warn  : [  434.509448] [   T5907]  ? __pfx_rcu_torture_reader (rcu/rcutorture.c:4041) rcutorture
kern  :warn  : [  434.509465] [   T5907]  ? __pfx_rcu_torture_reader (rcu/rcutorture.c:4041) rcutorture
kern  :warn  : [  434.509490] [   T5907]  kthread (kthread.c:436)
kern  :warn  : [  434.509493] [   T5907]  ? recalc_sigpending (linux/instrumented.h:97 asm-generic/bitops/instrumented-atomic.h:41 linux/thread_info.h:109 signal.c:181)
kern  :warn  : [  434.509495] [   T5907]  ? __pfx_kthread (linux/list.h:381 (discriminator 2))
kern  :warn  : [  434.509498] [   T5907]  ret_from_fork (x86/kernel/process.c:158)
kern  :warn  : [  434.509502] [   T5907]  ? __pfx_ret_from_fork (x86/include/asm/entry-common.h:54)
kern  :warn  : [  434.509504] [   T5907]  ? switch_fpu (linux/instrumented.h:82 asm-generic/bitops/instrumented-non-atomic.h:141 linux/thread_info.h:133 linux/sched.h:2067 x86/include/asm/fpu/sched.h:34)
kern  :warn  : [  434.509508] [   T5907]  ? __switch_to (x86/kernel/process_64.c:403 x86/kernel/process_64.c:663)
kern  :warn  : [  434.509511] [   T5907]  ? __switch_to_asm (x86/entry/entry_64.S:206)
kern  :warn  : [  434.509515] [   T5907]  ? __pfx_kthread (linux/list.h:381 (discriminator 2))
kern  :warn  : [  434.509517] [   T5907]  ret_from_fork_asm (x86/entry/entry_64.S:245)
kern  :warn  : [  434.509522] [   T5907]  </TASK>
kern  :warn  : [  434.509523] [   T5907] ---[ end trace 0000000000000000 ]---


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260521/202605211529.6ba1b4ff-lkp@intel.com



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


-- 
Mailing list info: https://lists.linux.it/listinfo/ltp

             reply	other threads:[~2026-05-21  7:54 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-21  7:54 kernel test robot [this message]
2026-05-21  7:54 ` [LTP] [paulmckrcu:dev.2026.05.07a] [rcutorture] c2e6a63ac1: RIP:rcu_torture_irq[rcutorture] kernel test robot
2026-05-21 15:55 ` Paul E. McKenney
2026-05-21 15:55   ` [LTP] " Paul E. McKenney via ltp
2026-05-22  1:54   ` Oliver Sang
2026-05-22  1:54     ` [LTP] " Oliver Sang

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