linux-kernel - [syzbot] WARNING in cpuset

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Message-ID: <0000000000009ebf5605e6ff48d5@google.com>
Date:   Wed, 24 Aug 2022 09:36:32 -0700
From:   syzbot <syzbot+29d3a3b4d86c8136ad9e@...kaller.appspotmail.com>
To:     Jason@...c4.com, frederic@...nel.org, linux-kernel@...r.kernel.org,
        mark.rutland@....com, peterz@...radead.org,
        sathyanarayanan.kuppuswamy@...ux.intel.com, steven.price@....com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: [syzbot] WARNING in cpuset_attach

Hello,

syzbot found the following issue on:

HEAD commit:    c40e8341e3b3 Merge tag 'cgroup-for-6.0-rc2-fixes' of git:/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=167bc60b080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=911efaff115942bb
dashboard link: https://syzkaller.appspot.com/bug?extid=29d3a3b4d86c8136ad9e
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

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

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+29d3a3b4d86c8136ad9e@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 3684 at kernel/cpu.c:347 lockdep_assert_cpus_held kernel/cpu.c:347 [inline]
WARNING: CPU: 0 PID: 3684 at kernel/cpu.c:347 lockdep_assert_cpus_held+0xbd/0xe0 kernel/cpu.c:336
Modules linked in:
CPU: 0 PID: 3684 Comm: kvm-nx-lpage-re Not tainted 6.0.0-rc2-syzkaller-00054-gc40e8341e3b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:lockdep_assert_cpus_held kernel/cpu.c:347 [inline]
RIP: 0010:lockdep_assert_cpus_held+0xbd/0xe0 kernel/cpu.c:336
Code: e8 38 0c 34 00 be ff ff ff ff 48 c7 c7 70 64 e3 8b e8 37 71 37 08 31 ff 89 c3 89 c6 e8 dc 08 34 00 85 db 75 d5 e8 13 0c 34 00 <0f> 0b eb cc 48 c7 c7 44 66 de 8d e8 d3 73 80 00 e9 62 ff ff ff 48
RSP: 0018:ffffc90004777c28 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801f243b00 RSI: ffffffff8147ff0d RDI: 0000000000000005
RBP: ffff88814b0a4800 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90004777de0
R13: ffffffff8bfdc2a0 R14: 1ffff920008eef8c R15: ffffc90004777e04
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020833000 CR3: 000000001bddc000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 cpuset_attach+0x92/0x520 kernel/cgroup/cpuset.c:2292
 cgroup_migrate_execute+0xbc7/0x1220 kernel/cgroup/cgroup.c:2584
 cgroup_attach_task+0x416/0x7c0 kernel/cgroup/cgroup.c:2875
 cgroup_attach_task_all+0xde/0x140 kernel/cgroup/cgroup-v1.c:70
 kvm_vm_worker_thread+0xdd/0x5a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:5979
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>


---
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