From: kernel test robot <oliver.sang@intel.com>
To: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
<apparmor@lists.ubuntu.com>, <linux-kernel@vger.kernel.org>,
<john.johansen@canonical.com>, <paul@paul-moore.com>,
<jmorris@namei.org>, <serge@hallyn.com>,
<linux-security-module@vger.kernel.org>, <gautham.shenoy@amd.com>,
<Santosh.Shukla@amd.com>, <Ananth.Narayan@amd.com>,
<Raghavendra.KodsaraThimmappa@amd.com>, <paulmck@kernel.org>,
<boqun.feng@gmail.com>, <vinicius.gomes@intel.com>,
<mjguzik@gmail.com>, <dennis@kernel.org>, <tj@kernel.org>,
<cl@linux.com>, <linux-mm@kvack.org>, <rcu@vger.kernel.org>,
<oliver.sang@intel.com>
Subject: Re: [RFC 6/6] apparmor: Switch labels to percpu ref managed mode
Date: Wed, 18 Sep 2024 13:44:21 +0800 [thread overview]
Message-ID: <202409181358.c07681be-oliver.sang@intel.com> (raw)
In-Reply-To: <20240916050811.473556-7-Neeraj.Upadhyay@amd.com>
Hello,
kernel test robot noticed "WARNING:at_lib/percpu-refcount.c:#__percpu_ref_switch_to_managed" on:
commit: 59b177cbdc4908a728329b8eec742969a2285979 ("[RFC 6/6] apparmor: Switch labels to percpu ref managed mode")
url: https://github.com/intel-lab-lkp/linux/commits/Neeraj-Upadhyay/percpu-refcount-Add-managed-mode-for-RCU-released-objects/20240916-131210
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-nonmm-unstable
patch link: https://lore.kernel.org/all/20240916050811.473556-7-Neeraj.Upadhyay@amd.com/
patch subject: [RFC 6/6] apparmor: Switch labels to percpu ref managed mode
in testcase: boot
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)
+------------------------------------------------------------------+------------+------------+
| | 124f137c55 | 59b177cbdc |
+------------------------------------------------------------------+------------+------------+
| WARNING:at_lib/percpu-refcount.c:#__percpu_ref_switch_to_managed | 0 | 13 |
| RIP:__percpu_ref_switch_to_managed | 0 | 13 |
+------------------------------------------------------------------+------------+------------+
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/202409181358.c07681be-oliver.sang@intel.com
[ 13.041399][ T0] ------------[ cut here ]------------
[ 13.042302][ T0] Percpu ref is already managed
[ 13.042302][ T0] WARNING: CPU: 0 PID: 0 at lib/percpu-refcount.c:151 __percpu_ref_switch_to_managed (lib/percpu-refcount.c:151 (discriminator 3))
[ 13.042302][ T0] Modules linked in:
[ 13.042302][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-rc6-00143-g59b177cbdc49 #12
[ 13.042302][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 13.042302][ T0] RIP: 0010:__percpu_ref_switch_to_managed (lib/percpu-refcount.c:151 (discriminator 3))
[ 13.042302][ T0] Code: 03 75 58 65 48 ff 08 e8 c1 7c ee fe eb b1 80 3d 5d a2 ca 03 00 75 c5 48 c7 c7 c0 61 8f 91 c6 05 4d a2 ca 03 01 e8 03 af ce fe <0f> 0b eb ae 31 f6 48 89 df e8 05 f7 ff ff e9 54 fe ff ff e8 4b aa
All code
========
0: 03 75 58 add 0x58(%rbp),%esi
3: 65 48 ff 08 decq %gs:(%rax)
7: e8 c1 7c ee fe callq 0xfffffffffeee7ccd
c: eb b1 jmp 0xffffffffffffffbf
e: 80 3d 5d a2 ca 03 00 cmpb $0x0,0x3caa25d(%rip) # 0x3caa272
15: 75 c5 jne 0xffffffffffffffdc
17: 48 c7 c7 c0 61 8f 91 mov $0xffffffff918f61c0,%rdi
1e: c6 05 4d a2 ca 03 01 movb $0x1,0x3caa24d(%rip) # 0x3caa272
25: e8 03 af ce fe callq 0xfffffffffeceaf2d
2a:* 0f 0b ud2 <-- trapping instruction
2c: eb ae jmp 0xffffffffffffffdc
2e: 31 f6 xor %esi,%esi
30: 48 89 df mov %rbx,%rdi
33: e8 05 f7 ff ff callq 0xfffffffffffff73d
38: e9 54 fe ff ff jmpq 0xfffffffffffffe91
3d: e8 .byte 0xe8
3e: 4b aa rex.WXB stos %al,%es:(%rdi)
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: eb ae jmp 0xffffffffffffffb2
4: 31 f6 xor %esi,%esi
6: 48 89 df mov %rbx,%rdi
9: e8 05 f7 ff ff callq 0xfffffffffffff713
e: e9 54 fe ff ff jmpq 0xfffffffffffffe67
13: e8 .byte 0xe8
14: 4b aa rex.WXB stos %al,%es:(%rdi)
[ 13.042302][ T0] RSP: 0000:ffffffff92407e00 EFLAGS: 00010082
[ 13.042302][ T0] RAX: 0000000000000000 RBX: ffff8881008a6500 RCX: 1ffffffff24a3780
[ 13.042302][ T0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[ 13.042302][ T0] RBP: ffff8881008a6508 R08: 0000000000000000 R09: fffffbfff24a3780
[ 13.042302][ T0] R10: ffffffff9251bc03 R11: 0000000000000001 R12: ffff8881001f3500
[ 13.042302][ T0] R13: ffff8881001f3500 R14: 0000000000000005 R15: 00000000000147b0
[ 13.042302][ T0] FS: 0000000000000000(0000) GS:ffff8883a8400000(0000) knlGS:0000000000000000
[ 13.042302][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 13.042302][ T0] CR2: ffff88843ffff000 CR3: 00000003b6e62000 CR4: 00000000000006f0
[ 13.042302][ T0] Call Trace:
[ 13.042302][ T0] <TASK>
[ 13.042302][ T0] ? __warn (kernel/panic.c:741)
[ 13.042302][ T0] ? __percpu_ref_switch_to_managed (lib/percpu-refcount.c:151 (discriminator 3))
[ 13.042302][ T0] ? report_bug (lib/bug.c:180 lib/bug.c:219)
[ 13.042302][ T0] ? handle_bug (arch/x86/kernel/traps.c:239)
[ 13.042302][ T0] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))
[ 13.042302][ T0] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621)
[ 13.042302][ T0] ? __percpu_ref_switch_to_managed (lib/percpu-refcount.c:151 (discriminator 3))
[ 13.042302][ T0] percpu_ref_switch_to_managed (include/linux/spinlock.h:406 lib/percpu-refcount.c:182)
[ 13.042302][ T0] aa_alloc_root_ns (security/apparmor/policy_ns.c:383)
[ 13.042302][ T0] ? aa_setup_dfa_engine (security/apparmor/lsm.c:2194)
[ 13.042302][ T0] apparmor_init (security/apparmor/lsm.c:2235)
[ 13.042302][ T0] initialize_lsm (security/security.c:263 (discriminator 3))
[ 13.042302][ T0] ordered_lsm_init (security/security.c:422 (discriminator 3))
[ 13.042302][ T0] security_init (security/security.c:475)
[ 13.042302][ T0] start_kernel (init/main.c:1085)
[ 13.042302][ T0] x86_64_start_reservations (arch/x86/kernel/head64.c:495)
[ 13.042302][ T0] x86_64_start_kernel (arch/x86/kernel/head64.c:437 (discriminator 17))
[ 13.042302][ T0] common_startup_64 (arch/x86/kernel/head_64.S:421)
[ 13.042302][ T0] </TASK>
[ 13.042302][ T0] ---[ end trace 0000000000000000 ]---
[ 13.044823][ T0] AppArmor: AppArmor initialized
[ 13.062176][ T0] Mount-cache hash table entries: 32768 (order: 6, 262144 bytes, linear)
[ 13.065846][ T0] Mountpoint-cache hash table entries: 32768 (order: 6, 262144 bytes, linear)
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240918/202409181358.c07681be-oliver.sang@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
prev parent reply other threads:[~2024-09-18 5:44 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-16 5:08 [RFC 0/6] Managed Percpu Refcount Neeraj Upadhyay
2024-09-16 5:08 ` [RFC 1/6] percpu-refcount: Add managed mode for RCU released objects Neeraj Upadhyay
2024-09-16 5:08 ` [RFC 2/6] percpu-refcount: Add torture test for percpu refcount Neeraj Upadhyay
2024-09-19 0:47 ` kernel test robot
2024-09-16 5:08 ` [RFC 3/6] percpu-refcount: Extend managed mode to allow runtime switching Neeraj Upadhyay
2024-09-16 12:04 ` kernel test robot
2024-09-16 19:07 ` kernel test robot
2024-09-16 5:08 ` [RFC 4/6] percpu-refcount-torture: Extend test with runtime mode switches Neeraj Upadhyay
2024-09-19 2:11 ` kernel test robot
2024-09-16 5:08 ` [RFC 5/6] apparmor: Switch labels to percpu refcount in atomic mode Neeraj Upadhyay
2024-09-16 5:08 ` [RFC 6/6] apparmor: Switch labels to percpu ref managed mode Neeraj Upadhyay
2024-09-18 5:44 ` kernel test robot [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202409181358.c07681be-oliver.sang@intel.com \
--to=oliver.sang@intel.com \
--cc=Ananth.Narayan@amd.com \
--cc=Neeraj.Upadhyay@amd.com \
--cc=Raghavendra.KodsaraThimmappa@amd.com \
--cc=Santosh.Shukla@amd.com \
--cc=apparmor@lists.ubuntu.com \
--cc=boqun.feng@gmail.com \
--cc=cl@linux.com \
--cc=dennis@kernel.org \
--cc=gautham.shenoy@amd.com \
--cc=jmorris@namei.org \
--cc=john.johansen@canonical.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-security-module@vger.kernel.org \
--cc=lkp@intel.com \
--cc=mjguzik@gmail.com \
--cc=oe-lkp@lists.linux.dev \
--cc=paul@paul-moore.com \
--cc=paulmck@kernel.org \
--cc=rcu@vger.kernel.org \
--cc=serge@hallyn.com \
--cc=tj@kernel.org \
--cc=vinicius.gomes@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.