linux-kernel - [syzbot] [cgroups?] [mm?] WARNING in mem_cgroup

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Message-ID: <000000000000da806a060804d749@google.com>
Date:   Wed, 18 Oct 2023 15:05:54 -0700
From:   syzbot <syzbot+038716e59282db4b4608@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, cgroups@...r.kernel.org,
        hannes@...xchg.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, mhocko@...nel.org, muchun.song@...ux.dev,
        roman.gushchin@...ux.dev, shakeelb@...gle.com,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] [cgroups?] [mm?] WARNING in mem_cgroup_migrate (2)

Hello,

syzbot found the following issue on:

HEAD commit:    7d730f1bf6f3 Add linux-next specific files for 20231005
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=14dc4ee5680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f532286be4fff4b5
dashboard link: https://syzkaller.appspot.com/bug?extid=038716e59282db4b4608
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1d7f28a4398f/disk-7d730f1b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d454d124268e/vmlinux-7d730f1b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/dbca966175cb/bzImage-7d730f1b.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+038716e59282db4b4608@...kaller.appspotmail.com

 __kernel_write fs/read_write.c:537 [inline]
 kernel_write fs/read_write.c:558 [inline]
 kernel_write+0x1f8/0x6c0 fs/read_write.c:548
 process_sysctl_arg+0x22c/0x5f0 fs/proc/proc_sysctl.c:1668
 parse_one kernel/params.c:154 [inline]
 parse_args+0x587/0x8b0 kernel/params.c:189
 do_sysctl_args+0xc8/0x150 fs/proc/proc_sysctl.c:1700
 kernel_init+0x75/0x2a0 init/main.c:1460
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
page_owner free stack trace missing
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5210 at mm/memcontrol.c:7552 mem_cgroup_migrate+0x2fa/0x390 mm/memcontrol.c:7552
Modules linked in:
CPU: 0 PID: 5210 Comm: syz-executor.0 Not tainted 6.6.0-rc4-next-20231005-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:mem_cgroup_migrate+0x2fa/0x390 mm/memcontrol.c:7552
Code: f7 ff e9 36 ff ff ff 80 3d 84 b2 d1 0c 00 0f 85 54 ff ff ff 48 c7 c6 a0 9e 9b 8a 48 89 ef e8 0d 5c df ff c6 05 68 b2 d1 0c 01 <0f> 0b e9 37 ff ff ff 48 c7 c6 e0 9a 9b 8a 48 89 df e8 f0 5b df ff
RSP: 0018:ffffc9000497fa18 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffea0005338000 RCX: ffffc90004f11000
RDX: 0000000000040000 RSI: ffffffff81e76463 RDI: ffffffff8ae96da0
RBP: ffffea00004a8000 R08: 0000000000000000 R09: fffffbfff1d9db9a
R10: ffffffff8ecedcd7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000200 R14: 0000000000000000 R15: ffffea00004a8018
FS:  00007f2fd9cb96c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8bc6f77978 CR3: 00000000206cc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hugetlbfs_migrate_folio fs/hugetlbfs/inode.c:1066 [inline]
 hugetlbfs_migrate_folio+0xd0/0x120 fs/hugetlbfs/inode.c:1049
 move_to_new_folio+0x183/0x690 mm/migrate.c:966
 unmap_and_move_huge_page mm/migrate.c:1428 [inline]
 migrate_hugetlbs mm/migrate.c:1546 [inline]
 migrate_pages+0x16ac/0x27c0 mm/migrate.c:1900
 do_move_pages_to_node mm/migrate.c:2039 [inline]
 move_pages_and_store_status+0xf4/0x230 mm/migrate.c:2129
 do_pages_move mm/migrate.c:2244 [inline]
 kernel_move_pages+0xc47/0x18e0 mm/migrate.c:2424
 __do_sys_move_pages mm/migrate.c:2438 [inline]
 __se_sys_move_pages mm/migrate.c:2433 [inline]
 __x64_sys_move_pages+0xe0/0x1b0 mm/migrate.c:2433
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2fd8e7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2fd9cb90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000117
RAX: ffffffffffffffda RBX: 00007f2fd8f9bf80 RCX: 00007f2fd8e7cae9
RDX: 0000000020000040 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 00007f2fd8ec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f2fd8f9bf80 R15: 00007fffc11f8338
 </TASK>


---
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If the bug is already fixed, let syzbot know by replying with:
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If you want to overwrite bug's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)

If the bug is a duplicate of another bug, reply with:
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#syz undup