From: kernel test robot <oliver.sang@intel.com>
To: David Hildenbrand <david@kernel.org>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
Andrew Morton <akpm@linux-foundation.org>, <suschako@amazon.de>,
Laurence Oberman <loberman@redhat.com>, <aneesh.kumar@kernel.org>,
Arnd Bergmann <arnd@arndb.de>, Jann Horn <jannh@google.com>,
Liam Howlett <liam.howlett@oracle.com>,
Liu Shixin <liushixin2@huawei.com>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
Muchun Song <muchun.song@linux.dev>,
Nadav Amit <nadav.amit@gmail.com>,
Nicholas Piggin <npiggin@gmail.com>,
"Oscar Salvador" <osalvador@suse.de>,
Peter Zijlstra <peterz@infradead.org>,
"Prakash Sangappa" <prakash.sangappa@oracle.com>,
Rik van Riel <riel@surriel.com>, Vlastimil Babka <vbabka@suse.cz>,
Will Deacon <will@kernel.org>, Lance Yang <lance.yang@linux.dev>,
<linux-arch@vger.kernel.org>, <linux-mm@kvack.org>,
<oliver.sang@intel.com>
Subject: [linux-next:master] [mm/hugetlb] 0e1ad0324a: WARNING:at_mm/mmu_gather.c:#tlb_finish_mmu
Date: Wed, 10 Dec 2025 22:55:40 +0800 [thread overview]
Message-ID: <202512102246.ee3d6d07-lkp@intel.com> (raw)
Hello,
kernel test robot noticed "WARNING:at_mm/mmu_gather.c:#tlb_finish_mmu" on:
commit: 0e1ad0324aabb5aef3ef409de9a395cda7ee6098 ("mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: boot
config: x86_64-randconfig-004-20251209
compiler: gcc-14
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+--------------------------------------------+------------+------------+
| | ef8ae3fc3a | 0e1ad0324a |
+--------------------------------------------+------------+------------+
| WARNING:at_mm/mmu_gather.c:#tlb_finish_mmu | 0 | 12 |
| RIP:tlb_finish_mmu | 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 <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202512102246.ee3d6d07-lkp@intel.com
[ 5.210750][ T44] ------------[ cut here ]------------
[ 5.211469][ T44] WARNING: CPU: 0 PID: 44 at mm/mmu_gather.c:475 tlb_finish_mmu (mm/mmu_gather.c:475)
[ 5.212311][ T44] Modules linked in:
[ 5.212737][ T44] CPU: 0 UID: 0 PID: 44 Comm: modprobe Tainted: G T 6.18.0-rc5-00395-g0e1ad0324aab #1 PREEMPT
[ 5.214003][ T44] Tainted: [T]=RANDSTRUCT
[ 5.214515][ T44] RIP: 0010:tlb_finish_mmu (mm/mmu_gather.c:475)
[ 5.215083][ T44] Code: 66 89 47 20 e8 90 fb ff ff ff 86 dc 00 00 00 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 54 53 48 89 fb f6 47 21 10 74 04 90 <0f> 0b 90 48 8b 03 8b 80 dc 00 00 00 ff c8 7e 10 80 4b 20 01 48 89
All code
========
0: 66 89 47 20 mov %ax,0x20(%rdi)
4: e8 90 fb ff ff call 0xfffffffffffffb99
9: ff 86 dc 00 00 00 incl 0xdc(%rsi)
f: 5d pop %rbp
10: c3 ret
11: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
18: 00
19: 55 push %rbp
1a: 48 89 e5 mov %rsp,%rbp
1d: 41 54 push %r12
1f: 53 push %rbx
20: 48 89 fb mov %rdi,%rbx
23: f6 47 21 10 testb $0x10,0x21(%rdi)
27: 74 04 je 0x2d
29: 90 nop
2a:* 0f 0b ud2 <-- trapping instruction
2c: 90 nop
2d: 48 8b 03 mov (%rbx),%rax
30: 8b 80 dc 00 00 00 mov 0xdc(%rax),%eax
36: ff c8 dec %eax
38: 7e 10 jle 0x4a
3a: 80 4b 20 01 orb $0x1,0x20(%rbx)
3e: 48 rex.W
3f: 89 .byte 0x89
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 90 nop
3: 48 8b 03 mov (%rbx),%rax
6: 8b 80 dc 00 00 00 mov 0xdc(%rax),%eax
c: ff c8 dec %eax
e: 7e 10 jle 0x20
10: 80 4b 20 01 orb $0x1,0x20(%rbx)
14: 48 rex.W
15: 89 .byte 0x89
[ 5.217110][ T44] RSP: 0000:ffff888103fc7c28 EFLAGS: 00010202
[ 5.217747][ T44] RAX: 0000000000000000 RBX: ffff888103fc7cc8 RCX: ffff888103fc7c68
[ 5.218585][ T44] RDX: ffff888102b85000 RSI: ffff888103fc7cc8 RDI: ffff888103fc7cc8
[ 5.219466][ T44] RBP: ffff888103fc7c38 R08: 00007fffffffe000 R09: 00007ffffffff000
[ 5.220295][ T44] R10: 0000000094692512 R11: ffff888101b54948 R12: 00007ffeaa1ad000
[ 5.221108][ T44] R13: 0000000000000000 R14: ffff888103f70a00 R15: ffff888102b85000
[ 5.221923][ T44] FS: 0000000000000000(0000) GS:0000000000000000(0000) knlGS:0000000000000000
[ 5.222854][ T44] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5.223545][ T44] CR2: ffff88883ffff000 CR3: 000000010172b000 CR4: 00000000000406b0
[ 5.224429][ T44] Call Trace:
[ 5.224782][ T44] <TASK>
[ 5.225096][ T44] setup_arg_pages (fs/exec.c:674)
[ 5.225621][ T44] load_elf_binary (fs/binfmt_elf.c:1028 (discriminator 1))
[ 5.226127][ T44] ? exec_binprm (fs/exec.c:1670 fs/exec.c:1702)
[ 5.226612][ T44] ? __lock_release+0x4e/0x120
[ 5.227188][ T44] ? exec_binprm (fs/exec.c:1670 fs/exec.c:1702)
[ 5.227678][ T44] ? __this_cpu_preempt_check (lib/smp_processor_id.c:65)
[ 5.228270][ T44] exec_binprm (fs/exec.c:1672 fs/exec.c:1702)
[ 5.228746][ T44] bprm_execve (fs/exec.c:1754)
[ 5.229212][ T44] kernel_execve (fs/exec.c:1922)
[ 5.229754][ T44] call_usermodehelper_exec_async (kernel/umh.c:109)
[ 5.230368][ T44] ? umh_complete (kernel/umh.c:64)
[ 5.230867][ T44] ret_from_fork (arch/x86/kernel/process.c:164)
[ 5.231341][ T44] ? umh_complete (kernel/umh.c:64)
[ 5.231813][ T44] ret_from_fork_asm (arch/x86/entry/entry_64.S:258)
[ 5.232321][ T44] </TASK>
[ 5.232643][ T44] irq event stamp: 469
[ 5.233065][ T44] hardirqs last enabled at (477): __up_console_sem (arch/x86/include/asm/irqflags.h:26 arch/x86/include/asm/irqflags.h:109 arch/x86/include/asm/irqflags.h:151 kernel/printk/printk.c:345)
[ 5.234028][ T44] hardirqs last disabled at (484): __up_console_sem (kernel/printk/printk.c:343 (discriminator 3))
[ 5.235062][ T44] softirqs last enabled at (504): handle_softirqs (kernel/softirq.c:469 (discriminator 2) kernel/softirq.c:650 (discriminator 2))
[ 5.236041][ T44] softirqs last disabled at (493): __do_softirq (kernel/softirq.c:657)
[ 5.236959][ T44] ---[ end trace 0000000000000000 ]---
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20251210/202512102246.ee3d6d07-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2025-12-10 14:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-10 14:55 kernel test robot [this message]
2025-12-10 15:02 ` [linux-next:master] [mm/hugetlb] 0e1ad0324a: WARNING:at_mm/mmu_gather.c:#tlb_finish_mmu Lorenzo Stoakes
2025-12-11 0:55 ` David Hildenbrand (Red Hat)
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