From: syzbot <syzbot+a74a028d848147bc5931@syzkaller.appspotmail.com>
To: akpm@linux-foundation.org, cgroups@vger.kernel.org,
hannes@cmpxchg.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, mhocko@kernel.org, muchun.song@linux.dev,
roman.gushchin@linux.dev, shakeel.butt@linux.dev,
syzkaller-bugs@googlegroups.com
Subject: [syzbot] [cgroups?] [mm?] WARNING in folio_lruvec_lock
Date: Thu, 19 Jun 2025 05:02:31 -0700 [thread overview]
Message-ID: <6853fc57.a00a0220.137b3.0009.GAE@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: bc6e0ba6c9ba Add linux-next specific files for 20250613
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1126090c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=2f7a2e4d17ed458f
dashboard link: https://syzkaller.appspot.com/bug?extid=a74a028d848147bc5931
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2430bb0465cc/disk-bc6e0ba6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/436a39deef0a/vmlinux-bc6e0ba6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e314ca5b1eb3/bzImage-bc6e0ba6.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a74a028d848147bc5931@syzkaller.appspotmail.com
handle_mm_fault+0x740/0x8e0 mm/memory.c:6397
faultin_page mm/gup.c:1186 [inline]
__get_user_pages+0x1aef/0x30b0 mm/gup.c:1488
populate_vma_page_range+0x29f/0x3a0 mm/gup.c:1922
__mm_populate+0x24c/0x380 mm/gup.c:2025
mm_populate include/linux/mm.h:3354 [inline]
vm_mmap_pgoff+0x3f0/0x4c0 mm/util.c:584
ksys_mmap_pgoff+0x587/0x760 mm/mmap.c:607
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page_owner free stack trace missing
------------[ cut here ]------------
WARNING: CPU: 0 PID: 38 at ./include/linux/memcontrol.h:732 folio_lruvec include/linux/memcontrol.h:732 [inline]
WARNING: CPU: 0 PID: 38 at ./include/linux/memcontrol.h:732 folio_lruvec_lock+0x150/0x1a0 mm/memcontrol.c:1211
Modules linked in:
CPU: 0 UID: 0 PID: 38 Comm: ksmd Not tainted 6.16.0-rc1-next-20250613-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:folio_lruvec include/linux/memcontrol.h:732 [inline]
RIP: 0010:folio_lruvec_lock+0x150/0x1a0 mm/memcontrol.c:1211
Code: 7c 25 00 00 74 08 4c 89 ff e8 7c 66 f8 ff 4d 89 2f eb c4 48 89 df 48 c7 c6 60 4f 98 8b e8 58 9b dc ff c6 05 01 85 5f 0d 01 90 <0f> 0b 90 e9 d5 fe ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 4d
RSP: 0018:ffffc90000ae7660 EFLAGS: 00010046
RAX: b21d845e3554e000 RBX: ffffea0002108000 RCX: b21d845e3554e000
RDX: 0000000000000002 RSI: ffffffff8db792e4 RDI: ffff88801de83c00
RBP: ffffea0002108000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa14 R12: ffffea0002108000
R13: ffffea0002108008 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125c41000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f475c15ef98 CR3: 000000005f95a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__split_unmapped_folio+0x42e/0x2cb0 mm/huge_memory.c:3487
__folio_split+0xf78/0x1300 mm/huge_memory.c:3891
cmp_and_merge_page mm/ksm.c:2358 [inline]
ksm_do_scan+0x499b/0x6530 mm/ksm.c:2665
ksm_scan_thread+0x10b/0x4b0 mm/ksm.c:2687
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
---
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next reply other threads:[~2025-06-19 12:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-19 12:02 syzbot [this message]
2025-06-20 11:50 ` [syzbot] [cgroups?] [mm?] WARNING in folio_lruvec_lock Lorenzo Stoakes
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