[syzbot] [kernel?] BUG: using smp_processor_id() in preemptible code in pwq_release_workfn

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 61df575632d6 libbpf: Add new sec_def "sk_skb/verdict"
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17683185180000
kernel config: https://syzkaller.appspot.com/x/.config?x=6fb1be60a193d440
dashboard link: https://syzkaller.appspot.com/bug?extid=60f75ab7624f6e44392b
compiler: Debian clang version 15.0.6, 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/0d2d0f91bfad/disk-61df5756.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0b0f2fd80260/vmlinux-61df5756.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0450c835a85f/bzImage-61df5756.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+60f75a...@syzkaller.appspotmail.com

BUG: using smp_processor_id() in preemptible [00000000] code: pool_workqueue_/3
caller is pv_init_node kernel/locking/qspinlock_paravirt.h:284 [inline]
caller is __pv_queued_spin_lock_slowpath+0x192/0xc60 kernel/locking/qspinlock.c:439
CPU: 1 PID: 3 Comm: pool_workqueue_ Not tainted 6.8.0-syzkaller-05238-g61df575632d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
pv_init_node kernel/locking/qspinlock_paravirt.h:284 [inline]
__pv_queued_spin_lock_slowpath+0x192/0xc60 kernel/locking/qspinlock.c:439
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline]
queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
lockdep_lock+0x1b0/0x2b0 kernel/locking/lockdep.c:144
lockdep_unregister_key+0x20d/0x540 kernel/locking/lockdep.c:6456
wq_unregister_lockdep kernel/workqueue.c:4655 [inline]
pwq_release_workfn+0x6e0/0x840 kernel/workqueue.c:4958
kthread_worker_fn+0x4bf/0xab0 kernel/kthread.c:841
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
</TASK>
BUG: using __this_cpu_add() in preemptible [00000000] code: pool_workqueue_/3
caller is __pv_queued_spin_lock_slowpath+0x945/0xc60 kernel/locking/qspinlock.c:565
CPU: 1 PID: 3 Comm: pool_workqueue_ Not tainted 6.8.0-syzkaller-05238-g61df575632d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
__pv_queued_spin_lock_slowpath+0x945/0xc60 kernel/locking/qspinlock.c:565
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline]
queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
lockdep_lock+0x1b0/0x2b0 kernel/locking/lockdep.c:144
lockdep_unregister_key+0x20d/0x540 kernel/locking/lockdep.c:6456
wq_unregister_lockdep kernel/workqueue.c:4655 [inline]
pwq_release_workfn+0x6e0/0x840 kernel/workqueue.c:4958
kthread_worker_fn+0x4bf/0xab0 kernel/kthread.c:841
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
</TASK>
BUG: using __this_cpu_add() in preemptible [00000000] code: pool_workqueue_/3
caller is lockdep_unlock+0x16a/0x300 kernel/locking/lockdep.c:157
CPU: 1 PID: 3 Comm: pool_workqueue_ Not tainted 6.8.0-syzkaller-05238-g61df575632d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
lockdep_unlock+0x16a/0x300 kernel/locking/lockdep.c:157
lockdep_unregister_key+0x45c/0x540 kernel/locking/lockdep.c:6471
wq_unregister_lockdep kernel/workqueue.c:4655 [inline]
pwq_release_workfn+0x6e0/0x840 kernel/workqueue.c:4958
kthread_worker_fn+0x4bf/0xab0 kernel/kthread.c:841
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
</TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup