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Message-ID: <202408091019.8ed98238-lkp@intel.com>
Date: Fri, 9 Aug 2024 10:22:08 +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>, <linux-kernel@...r.kernel.org>,
<oliver.sang@...el.com>
Subject: [paulmckrcu:dev.2024.08.05a] [rcuscale] 0b85a3ea0a:
WARNING:at_lib/alloc_tag.c:#alloc_tag_module_unload
hi, Paul,
we noticed the issue for dev.2024.07.31a at first, but recently we cannot handle
the report fast enough so didn't report that to you.
we also noticed similar commit in dev.2024.08.06a, but didn't finish test so
far. in order to avoid further delay, just send out this FYI.
if it's a known issue and has already fixed in dev.2024.08.06a, please just
ignore. thanks
Hello,
kernel test robot noticed "WARNING:at_lib/alloc_tag.c:#alloc_tag_module_unload" on:
commit: 0b85a3ea0a8e4d8235e858a3aa1dadc3d0cec4e2 ("rcuscale: Dump stacks of stalled rcu_scale_writer() instances")
https://github.com/paulmckrcu/linux dev.2024.08.05a
in testcase: rcuscale
version:
with following parameters:
runtime: 300s
scale_type: rcu
compiler: clang-18
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+-----------------------------------------------------+------------+------------+
| | 532e4ab154 | 0b85a3ea0a |
+-----------------------------------------------------+------------+------------+
| WARNING:at_lib/alloc_tag.c:#alloc_tag_module_unload | 0 | 12 |
| RIP:alloc_tag_module_unload | 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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202408091019.8ed98238-lkp@intel.com
[ 465.251143][ T1160] ------------[ cut here ]------------
[ 465.252395][ T1160] kernel/rcu/rcuscale.c:1037 module rcuscale func:rcu_scale_init has 32 allocated at module unload
[ 465.252492][ T1160] WARNING: CPU: 0 PID: 1160 at lib/alloc_tag.c:170 alloc_tag_module_unload (lib/alloc_tag.c:168)
[ 465.256072][ T1160] Modules linked in: rcuscale(-) torture ipmi_devintf ppdev crct10dif_pclmul crc32_pclmul parport_pc aesni_intel parport serio_raw loop fuse [last unloaded: rcuscale]
[ 465.259112][ T1160] CPU: 0 UID: 0 PID: 1160 Comm: rmmod Not tainted 6.11.0-rc1-00092-g0b85a3ea0a8e #1 ec0c0d0dad6c67a7bbf1e37f55102072a1ba998f
[ 465.261458][ T1160] RIP: 0010:alloc_tag_module_unload (lib/alloc_tag.c:168)
[ 465.262400][ T1160] Code: 28 00 74 08 4c 89 ff e8 49 cf 44 ff 4d 8b 07 48 c7 c7 20 1a ca 83 48 8b 74 24 08 8b 54 24 04 48 89 e9 4d 89 e1 e8 6b 69 fd fe <0f> 0b 31 ed e9 54 ff ff ff 89 f9 80 e1 07 80 c1 03 38 c1 7c 90 e8
All code
========
0: 28 00 sub %al,(%rax)
2: 74 08 je 0xc
4: 4c 89 ff mov %r15,%rdi
7: e8 49 cf 44 ff call 0xffffffffff44cf55
c: 4d 8b 07 mov (%r15),%r8
f: 48 c7 c7 20 1a ca 83 mov $0xffffffff83ca1a20,%rdi
16: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
1b: 8b 54 24 04 mov 0x4(%rsp),%edx
1f: 48 89 e9 mov %rbp,%rcx
22: 4d 89 e1 mov %r12,%r9
25: e8 6b 69 fd fe call 0xfffffffffefd6995
2a:* 0f 0b ud2 <-- trapping instruction
2c: 31 ed xor %ebp,%ebp
2e: e9 54 ff ff ff jmp 0xffffffffffffff87
33: 89 f9 mov %edi,%ecx
35: 80 e1 07 and $0x7,%cl
38: 80 c1 03 add $0x3,%cl
3b: 38 c1 cmp %al,%cl
3d: 7c 90 jl 0xffffffffffffffcf
3f: e8 .byte 0xe8
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 31 ed xor %ebp,%ebp
4: e9 54 ff ff ff jmp 0xffffffffffffff5d
9: 89 f9 mov %edi,%ecx
b: 80 e1 07 and $0x7,%cl
e: 80 c1 03 add $0x3,%cl
11: 38 c1 cmp %al,%cl
13: 7c 90 jl 0xffffffffffffffa5
15: e8 .byte 0xe8
[ 465.265130][ T1160] RSP: 0018:ffffc900011afd68 EFLAGS: 00010246
[ 465.266022][ T1160] RAX: 51a3a0ce4fdfd600 RBX: ffff888172cb5500 RCX: 0000000000000027
[ 465.267255][ T1160] RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001
[ 465.268415][ T1160] RBP: ffffffffa00f0d40 R08: ffffffff844421b3 R09: 1ffffffff0888436
[ 465.269691][ T1160] R10: dffffc0000000000 R11: fffffbfff0888437 R12: 0000000000000020
[ 465.271189][ T1160] R13: dffffc0000000000 R14: ffffc900011afd78 R15: ffffffffa01020b0
[ 465.272696][ T1160] FS: 00007f203113f040(0000) GS:ffffffff8443f000(0000) knlGS:0000000000000000
[ 465.274153][ T1160] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 465.275111][ T1160] CR2: 0000000000403034 CR3: 00000001363f4000 CR4: 00000000000406b0
[ 465.276271][ T1160] Call Trace:
[ 465.276756][ T1160] <TASK>
[ 465.277245][ T1160] ? __warn (kernel/panic.c:735)
[ 465.277839][ T1160] ? alloc_tag_module_unload (lib/alloc_tag.c:168)
[ 465.278668][ T1160] ? alloc_tag_module_unload (lib/alloc_tag.c:168)
[ 465.279498][ T1160] ? report_bug (lib/bug.c:?)
[ 465.280184][ T1160] ? irq_work_queue (arch/x86/include/asm/atomic.h:23)
[ 465.280940][ T1160] ? handle_bug (arch/x86/kernel/traps.c:239)
[ 465.281831][ T1160] ? exc_invalid_op (arch/x86/kernel/traps.c:260)
[ 465.282745][ T1160] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621)
[ 465.283741][ T1160] ? alloc_tag_module_unload (lib/alloc_tag.c:168)
[ 465.284759][ T1160] ? alloc_tag_module_unload (lib/alloc_tag.c:168)
[ 465.285926][ T1160] codetag_unload_module (lib/codetag.c:?)
[ 465.286979][ T1160] free_module (kernel/module/main.c:1265)
[ 465.287832][ T1160] __se_sys_delete_module (kernel/module/main.c:?)
[ 465.288898][ T1160] do_syscall_64 (arch/x86/entry/common.c:?)
[ 465.289820][ T1160] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 465.290950][ T1160] RIP: 0033:0x7f2031249a67
[ 465.291843][ T1160] Code: 73 01 c3 48 8b 0d 99 83 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 69 83 0c 00 f7 d8 64 89 01 48
All code
========
0: 73 01 jae 0x3
2: c3 ret
3: 48 8b 0d 99 83 0c 00 mov 0xc8399(%rip),%rcx # 0xc83a3
a: f7 d8 neg %eax
c: 64 89 01 mov %eax,%fs:(%rcx)
f: 48 83 c8 ff or $0xffffffffffffffff,%rax
13: c3 ret
14: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
1b: 00 00 00
1e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
23: b8 b0 00 00 00 mov $0xb0,%eax
28: 0f 05 syscall
2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction
30: 73 01 jae 0x33
32: c3 ret
33: 48 8b 0d 69 83 0c 00 mov 0xc8369(%rip),%rcx # 0xc83a3
3a: f7 d8 neg %eax
3c: 64 89 01 mov %eax,%fs:(%rcx)
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 73 01 jae 0x9
8: c3 ret
9: 48 8b 0d 69 83 0c 00 mov 0xc8369(%rip),%rcx # 0xc8379
10: f7 d8 neg %eax
12: 64 89 01 mov %eax,%fs:(%rcx)
15: 48 rex.W
[ 465.295546][ T1160] RSP: 002b:00007ffee44793a8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[ 465.297112][ T1160] RAX: ffffffffffffffda RBX: 000055c7c8f1f9e0 RCX: 00007f2031249a67
[ 465.298754][ T1160] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055c7c8f1fa48
[ 465.300377][ T1160] RBP: 0000000000000000 R08: 1999999999999999 R09: 0000000000000000
[ 465.302001][ T1160] R10: 00007f20312bcac0 R11: 0000000000000206 R12: 00007ffee44795f0
[ 465.303607][ T1160] R13: 00007ffee4479cbb R14: 000055c7c8f1f2a0 R15: 00007ffee44795f8
[ 465.305204][ T1160] </TASK>
[ 465.305829][ T1160] irq event stamp: 9149
[ 465.306676][ T1160] hardirqs last enabled at (9159): console_unlock (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:341 kernel/printk/printk.c:2801 kernel/printk/printk.c:3120)
[ 465.308517][ T1160] hardirqs last disabled at (9168): console_unlock (kernel/printk/printk.c:339 kernel/printk/printk.c:2801 kernel/printk/printk.c:3120)
[ 465.310377][ T1160] softirqs last enabled at (8828): handle_softirqs (arch/x86/include/asm/preempt.h:26 kernel/softirq.c:401 kernel/softirq.c:582)
[ 465.312194][ T1160] softirqs last disabled at (8819): irq_exit_rcu (kernel/softirq.c:651)
[ 465.314128][ T1160] ---[ end trace 0000000000000000 ]---
[ 465.315325][ T1160] rcuscale: memory allocation(s) from the module still alive, cannot unload cleanly
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240809/202408091019.8ed98238-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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