linux-kernel - [linux-next:master] [rcutorture] ddd062f753: WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture

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Message-ID: <202504211513.23f21a0-lkp@intel.com>
Date: Mon, 21 Apr 2025 15:39:41 +0800
From: kernel test robot <oliver.sang@...el.com>
To: "Paul E. McKenney" <paulmck@...nel.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, Joel Fernandes
	<joelagnelf@...dia.com>, <linux-kernel@...r.kernel.org>,
	<oliver.sang@...el.com>
Subject: [linux-next:master] [rcutorture]  ddd062f753:
 WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_updown[rcutorture]



Hello,

kernel test robot noticed "WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_updown[rcutorture]" on:

commit: ddd062f7536cc09fe7ff1a66816601984bc68af8 ("rcutorture: Complain if an ->up_read() is delayed more than 10 seconds")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

[test failed on linux-next/master f660850bc246fef15ba78c81f686860324396628]

in testcase: rcutorture
version: 
with following parameters:

	runtime: 300s
	test: cpuhotplug
	torture_type: srcud



config: x86_64-randconfig-123-20250415
compiler: clang-20
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

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


+-------------------------------------------------------------------------+------------+------------+
|                                                                         | 1b983c34d5 | ddd062f753 |
+-------------------------------------------------------------------------+------------+------------+
| WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_updown[rcutorture]      | 0          | 24         |
| RIP:rcu_torture_updown[rcutorture]                                      | 0          | 24         |
+-------------------------------------------------------------------------+------------+------------+


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/202504211513.23f21a0-lkp@intel.com


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250421/202504211513.23f21a0-lkp@intel.com


[  147.544571][  T727] ------------[ cut here ]------------
[  147.545372][  T727] WARNING: CPU: 0 PID: 727 at kernel/rcu/rcutorture.c:2549 rcu_torture_updown+0xe0/0x430 [rcutorture]
[  147.546643][  T727] Modules linked in: rcutorture torture
[  147.547462][  T727] CPU: 0 UID: 0 PID: 727 Comm: rcu_torture_upd Not tainted 6.15.0-rc1-00008-gddd062f7536c #1 NONE  0a926b04a3771ed2623ec5d12c96d338a637f034
[  147.549036][  T727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[  147.550241][  T727] RIP: 0010:rcu_torture_updown+0xe0/0x430 [rcutorture]
[  147.551128][  T727] Code: 00 00 48 01 c3 48 8b 44 24 10 42 80 3c 20 00 74 0c 48 c7 c7 00 12 41 87 e8 fd 1b 49 e1 48 3b 1d a6 58 e0 e6 0f 89 84 01 00 00 <0f> 0b e9 7d 01 00 00 4c 89 7c 24 08 4f 8d 3c 2e 49 83 c7 60 4b 8d
[  147.553366][  T727] RSP: 0000:ffff888150ebfe60 EFLAGS: 00210297
[  147.554154][  T727] RAX: 1ffffffff0e82240 RBX: 00000000ffffc39e RCX: 0000000000000000
[  147.555179][  T727] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888150eb3450
[  147.572489][  T727] RBP: ffff888150eb6bd8 R08: 0000000000000000 R09: 0000000000000000
[  147.573518][  T727] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[  147.574582][  T727] R13: ffff888150eb0000 R14: 0000000000003408 R15: ffff888150eb3448
[  147.577955][  T727] FS:  0000000000000000(0000) GS:ffff888424c90000(0000) knlGS:0000000000000000
[  147.579066][  T727] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  147.579850][  T727] CR2: 00000000f729a000 CR3: 000000014d67f000 CR4: 00000000000406f0
[  147.580851][  T727] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  147.581887][  T727] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  147.582799][  T727] Call Trace:
[  147.583264][  T727]  <TASK>
[  147.583703][  T727]  kthread+0x4b7/0x5e0
[  147.584257][  T727]  ? rcu_torture_updown_hrt+0x60/0x60 [rcutorture 02ecf78e8bf32d7a769b787a1e354f19e873c8f2]
[  147.591263][  T727]  ? kthread_unuse_mm+0x150/0x150
[  147.591978][  T727]  ret_from_fork+0x3c/0x70
[  147.592545][  T727]  ? kthread_unuse_mm+0x150/0x150
[  147.593167][  T727]  ret_from_fork_asm+0x11/0x20
[  147.593805][  T727]  </TASK>
[  147.594276][  T727] irq event stamp: 340637
[  147.597624][  T727] hardirqs last  enabled at (340653): [<ffffffff815a4e82>] __console_unlock+0x72/0x80
[  147.598763][  T727] hardirqs last disabled at (340662): [<ffffffff815a4e67>] __console_unlock+0x57/0x80
[  147.599920][  T727] softirqs last  enabled at (340578): [<ffffffff8148ecce>] handle_softirqs+0x5de/0x6e0
[  147.601075][  T727] softirqs last disabled at (340569): [<ffffffff8148ef41>] __irq_exit_rcu+0x61/0xc0
[  147.602178][  T727] ---[ end trace 0000000000000000 ]---


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