[paulmck-rcu:dev.2024.07.17a] [EXP rcuscale] 9e146da3f3: WARNING:at_lib/alloc_tag.c:#alloc_tag_module_unload
From: kernel test robot
Date: Thu Jul 25 2024 - 02:49:52 EST
hi, Paul E. McKenney,
we noticed in commit message "Not for mainline in its current form".
we saw below commits in the branch:
cdd5ddaa17fe fixup! EXP rcuscale: Dump debug info
4f60b8b679fd squash! EXP rcuscale: Dump debug info
but we still observed same issue on the branch tip:
fe09f037acf7 (dev.2024.07.17a) rcuscale: Make rcu_scale_writer() tolerate repeated GFP_KERNEL failure
at the same time, we noticed there is no same title commit in newer branch:
dev.2024.07.18a
just still made below formal report to you since we are not sure if it could
supply any useful information. if not, please just ignore. Thanks!
Hello,
kernel test robot noticed "WARNING:at_lib/alloc_tag.c:#alloc_tag_module_unload" on:
commit: 9e146da3f351c0eaf66756cc3a6c6a5845b81187 ("EXP rcuscale: Dump debug info")
https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev.2024.07.17a
in testcase: rcuscale
version:
with following parameters:
runtime: 300s
scale_type: tasks-tracing
compiler: gcc-13
test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+-----------------------------------------------------+------------+------------+
| | e136892a8e | 9e146da3f3 |
+-----------------------------------------------------+------------+------------+
| WARNING:at_lib/alloc_tag.c:#alloc_tag_module_unload | 0 | 12 |
| EIP: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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202407251351.f65c33a0-lkp@xxxxxxxxx
[ 439.356638][ T1799] ------------[ cut here ]------------
[ 439.357183][ T1799] kernel/rcu/rcuscale.c:1037 module rcuscale func:rcu_scale_init has 8 allocated at module unload
[ 439.357225][ T1799] WARNING: CPU: 0 PID: 1799 at lib/alloc_tag.c:168 alloc_tag_module_unload (lib/alloc_tag.c:168 (discriminator 1))
[ 439.358903][ T1799] Modules linked in: rcuscale(-) torture [last unloaded: rcuscale]
[ 439.359632][ T1799] CPU: 0 PID: 1799 Comm: rmmod Not tainted 6.10.0-rc5-00110-g9e146da3f351 #1 308a8ed8688556473cf6c28b678fa76bc00dc1d7
[ 439.360679][ T1799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 439.361546][ T1799] EIP: alloc_tag_module_unload (lib/alloc_tag.c:168 (discriminator 1))
[ 439.361993][ T1799] Code: 92 ff ff ff 8b 55 e8 8b 45 e4 85 d2 75 04 85 c0 74 21 52 50 ff 73 0c ff 73 08 ff 73 04 ff 73 10 68 d8 2f cb c2 e8 ec 39 9f ff <0f> 0b c6 45 d3 00 83 c4 1c 8d 45 d4 e8 2e fc ff ff 89 c3 eb b2 8a
All code
========
0: 92 xchg %eax,%edx
1: ff (bad)
2: ff (bad)
3: ff 8b 55 e8 8b 45 decl 0x458be855(%rbx)
9: e4 85 in $0x85,%al
b: d2 75 04 shlb %cl,0x4(%rbp)
e: 85 c0 test %eax,%eax
10: 74 21 je 0x33
12: 52 push %rdx
13: 50 push %rax
14: ff 73 0c push 0xc(%rbx)
17: ff 73 08 push 0x8(%rbx)
1a: ff 73 04 push 0x4(%rbx)
1d: ff 73 10 push 0x10(%rbx)
20: 68 d8 2f cb c2 push $0xffffffffc2cb2fd8
25: e8 ec 39 9f ff call 0xffffffffff9f3a16
2a:* 0f 0b ud2 <-- trapping instruction
2c: c6 45 d3 00 movb $0x0,-0x2d(%rbp)
30: 83 c4 1c add $0x1c,%esp
33: 8d 45 d4 lea -0x2c(%rbp),%eax
36: e8 2e fc ff ff call 0xfffffffffffffc69
3b: 89 c3 mov %eax,%ebx
3d: eb b2 jmp 0xfffffffffffffff1
3f: 8a .byte 0x8a
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: c6 45 d3 00 movb $0x0,-0x2d(%rbp)
6: 83 c4 1c add $0x1c,%esp
9: 8d 45 d4 lea -0x2c(%rbp),%eax
c: e8 2e fc ff ff call 0xfffffffffffffc3f
11: 89 c3 mov %eax,%ebx
13: eb b2 jmp 0xffffffffffffffc7
15: 8a .byte 0x8a
[ 439.363599][ T1799] EAX: 00000000 EBX: efbf9040 ECX: 00000000 EDX: 00000000
[ 439.364218][ T1799] ESI: c4215290 EDI: ebdfdedc EBP: ebdfdee8 ESP: ebdfde9c
[ 439.364818][ T1799] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00210246
[ 439.365471][ T1799] CR0: 80050033 CR2: b71fd210 CR3: 04026300 CR4: 000406b0
[ 439.366083][ T1799] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 439.366676][ T1799] DR6: fffe0ff0 DR7: 00000400
[ 439.367170][ T1799] Call Trace:
[ 439.367451][ T1799] ? show_regs (arch/x86/kernel/dumpstack.c:479 arch/x86/kernel/dumpstack.c:465)
[ 439.367803][ T1799] ? alloc_tag_module_unload (lib/alloc_tag.c:168 (discriminator 1))
[ 439.368264][ T1799] ? __warn (kernel/panic.c:693)
[ 439.368604][ T1799] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[ 439.368992][ T1799] ? alloc_tag_module_unload (lib/alloc_tag.c:168 (discriminator 1))
[ 439.369435][ T1799] ? exc_overflow (arch/x86/kernel/traps.c:252)
[ 439.369807][ T1799] ? handle_bug (arch/x86/kernel/traps.c:239)
[ 439.370162][ T1799] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))
[ 439.370549][ T1799] ? handle_exception (arch/x86/entry/entry_32.S:1047)
[ 439.371024][ T1799] ? exc_overflow (arch/x86/kernel/traps.c:252)
[ 439.371397][ T1799] ? alloc_tag_module_unload (lib/alloc_tag.c:168 (discriminator 1))
[ 439.371843][ T1799] ? exc_overflow (arch/x86/kernel/traps.c:252)
[ 439.372238][ T1799] ? alloc_tag_module_unload (lib/alloc_tag.c:168 (discriminator 1))
[ 439.372693][ T1799] codetag_unload_module (lib/codetag.c:238 (discriminator 1))
[ 439.373112][ T1799] free_module (kernel/module/main.c:1266)
[ 439.373470][ T1799] __do_sys_delete_module+0x1b9/0x206
[ 439.373968][ T1799] __ia32_sys_delete_module (kernel/module/main.c:700)
[ 439.374397][ T1799] ia32_sys_call (kbuild/obj/consumer/i386-randconfig-061-20240719/./arch/x86/include/generated/asm/syscalls_32.h:130)
[ 439.374780][ T1799] do_int80_syscall_32 (arch/x86/entry/common.c:165 (discriminator 1) arch/x86/entry/common.c:339 (discriminator 1))
[ 439.375225][ T1799] entry_INT80_32 (arch/x86/entry/entry_32.S:944)
[ 439.375611][ T1799] EIP: 0xb7f79092
[ 439.375910][ T1799] Code: 00 00 00 e9 90 ff ff ff ff a3 24 00 00 00 68 30 00 00 00 e9 80 ff ff ff ff a3 f8 ff ff ff 66 90 00 00 00 00 00 00 00 00 cd 80 <c3> 8d b4 26 00 00 00 00 8d b6 00 00 00 00 8b 1c 24 c3 8d b4 26 00
All code
========
0: 00 00 add %al,(%rax)
2: 00 e9 add %ch,%cl
4: 90 nop
5: ff (bad)
6: ff (bad)
7: ff (bad)
8: ff a3 24 00 00 00 jmp *0x24(%rbx)
e: 68 30 00 00 00 push $0x30
13: e9 80 ff ff ff jmp 0xffffffffffffff98
18: ff a3 f8 ff ff ff jmp *-0x8(%rbx)
1e: 66 90 xchg %ax,%ax
...
28: cd 80 int $0x80
2a:* c3 ret <-- trapping instruction
2b: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
32: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi
38: 8b 1c 24 mov (%rsp),%ebx
3b: c3 ret
3c: 8d .byte 0x8d
3d: b4 26 mov $0x26,%ah
...
Code starting with the faulting instruction
===========================================
0: c3 ret
1: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
8: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi
e: 8b 1c 24 mov (%rsp),%ebx
11: c3 ret
12: 8d .byte 0x8d
13: b4 26 mov $0x26,%ah
...
[ 439.377475][ T1799] EAX: ffffffda EBX: 00e4333c ECX: 00000800 EDX: 00484939
[ 439.378043][ T1799] ESI: 00e43300 EDI: 00e43300 EBP: bfbcdc46 ESP: bfbcccc4
[ 439.378610][ T1799] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00200202
[ 439.379237][ T1799] irq event stamp: 5473
[ 439.379574][ T1799] hardirqs last enabled at (5483): console_unlock (arch/x86/include/asm/irqflags.h:42 arch/x86/include/asm/irqflags.h:77 arch/x86/include/asm/irqflags.h:135 kernel/printk/printk.c:341 kernel/printk/printk.c:2746 kernel/printk/printk.c:3065)
[ 439.380336][ T1799] hardirqs last disabled at (5494): console_unlock (kernel/printk/printk.c:339 (discriminator 3) kernel/printk/printk.c:2746 (discriminator 3) kernel/printk/printk.c:3065 (discriminator 3))
[ 439.381023][ T1799] softirqs last enabled at (5142): handle_softirqs (kernel/softirq.c:401 (discriminator 2) kernel/softirq.c:582 (discriminator 2))
[ 439.381726][ T1799] softirqs last disabled at (5133): __do_softirq (kernel/softirq.c:589)
[ 439.382384][ T1799] ---[ end trace 0000000000000000 ]---
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240725/202407251351.f65c33a0-lkp@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki