linux-kernel - [syzbot] upstream boot error: WARNING in kvm

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Date:   Fri, 05 Mar 2021 12:56:18 -0800
From:   syzbot <syzbot+a4c8bc1d1dc7b620630d@...kaller.appspotmail.com>
To:     bp@...en8.de, hpa@...or.com, jmattson@...gle.com, joro@...tes.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, pbonzini@...hat.com, seanjc@...gle.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        vkuznets@...hat.com, wanpengli@...cent.com, x86@...nel.org
Subject: [syzbot] upstream boot error: WARNING in kvm_wait

Hello,

syzbot found the following issue on:

HEAD commit:    280d542f Merge tag 'drm-fixes-2021-03-05' of git://anongit..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=138c7a92d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=dc4003509ab3fc78
dashboard link: https://syzkaller.appspot.com/bug?extid=a4c8bc1d1dc7b620630d

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a4c8bc1d1dc7b620630d@...kaller.appspotmail.com

------------[ cut here ]------------
raw_local_irq_restore() called with IRQs enabled
WARNING: CPU: 2 PID: 213 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:10
Modules linked in:
CPU: 2 PID: 213 Comm: kworker/u17:4 Not tainted 5.12.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: events_unbound call_usermodehelper_exec_work

RIP: 0010:warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:10
Code: be ff cc cc cc cc cc cc cc cc cc cc cc 80 3d e4 38 af 04 00 74 01 c3 48 c7 c7 a0 8f 6b 89 c6 05 d3 38 af 04 01 e8 e7 b9 be ff <0f> 0b c3 48 39 77 10 0f 84 97 00 00 00 66 f7 47 22 f0 ff 74 4b 48
RSP: 0000:ffffc90000fe7770 EFLAGS: 00010286

RAX: 0000000000000000 RBX: ffffffff8c0e9c68 RCX: 0000000000000000
RDX: ffff8880116bc3c0 RSI: ffffffff815c0cf5 RDI: fffff520001fcee0
RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff815b9a5e R11: 0000000000000000 R12: 0000000000000003
R13: fffffbfff181d38d R14: 0000000000000001 R15: ffff88802cc36000
FS:  0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000bc8e000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kvm_wait arch/x86/kernel/kvm.c:860 [inline]
 kvm_wait+0xc9/0xe0 arch/x86/kernel/kvm.c:837
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x8b8/0xb40 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113
 spin_lock include/linux/spinlock.h:354 [inline]
 copy_fs_struct+0x1c8/0x340 fs/fs_struct.c:123
 copy_fs kernel/fork.c:1443 [inline]
 copy_process+0x4dc2/0x6fd0 kernel/fork.c:2088
 kernel_clone+0xe7/0xab0 kernel/fork.c:2462
 kernel_thread+0xb5/0xf0 kernel/fork.c:2514
 call_usermodehelper_exec_work kernel/umh.c:172 [inline]
 call_usermodehelper_exec_work+0xcc/0x180 kernel/umh.c:158
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294


---
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